Today's Message Index:
----------------------
1. 06:14 AM - Re: Re: Yak 52 maneuver speed (Jim Burke)
2. 06:20 AM - Re: Re: Yak 52 maneuver speed (bill wade)
3. 07:34 AM - Re: Re: Yak 52 maneuver speed (Todd McCutchan)
4. 07:47 AM - Re: Re: Yak 52 maneuver speed (Richard Hess)
5. 08:18 AM - Re: Re: Yak 52 maneuver speed (Todd McCutchan)
6. 08:26 AM - Re: Re: Yak 52 maneuver speed (Todd McCutchan)
7. 08:27 AM - Re: Re: Yak 52 maneuver speed (Richard Hess)
8. 08:37 AM - Re: Re: Yak 52 maneuver speed (Todd McCutchan)
9. 09:11 AM - Aw: Re: Re: Yak 52 maneuver speed (Markus Feyerabend)
10. 09:30 AM - Back Up Scuba Bottle (Robin Hou)
11. 10:11 AM - Re: Back Up Scuba Bottle (DaBear)
12. 01:35 PM - Re: Back Up Scuba Bottle (Jon Blake)
13. 05:40 PM - Re: Re: Yak 52 maneuver speed (Jim Burke)
14. 10:55 PM - Re: Re: Yak 52 maneuver speed (Mike Beresford)
Message 1
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| Subject: | Re: Yak 52 maneuver speed |
Thanks Todd, good information.
Jim
Sent from my iPad
> On Jan 10, 2014, at 22:05, "Todd McCutchan" <todd@fastaircraft.com> wrote:
>
> Please also keep in mind that stall speed (at least in USA aircraft) is ca
lculated based on MTOW and farthest allowable aft CG. If you are flying at w
eights below MTOW the Va will also be lower as it decreases as weight decrea
ses (rule of thumb is 1 knot per 100 lbs).
>
> Again you can calculate this using the same formula if you know the lower V
s or if Vs is unknown for the reduced weight you can calculate using <image0
03.png>
> Va would be the maneuvering speed you previously calculated based on MTOW.
W2 is the current weight and W1 is the MTOW.
>
> Cheers!
>
> Todd McCutchan
> Fast Aircraft
> T-34A & Yak-50
>
> Cell - 260.402.1740
>
> Email: todd@fastaircraft.com
> Skype: tmccutchan
> Web: www.fastaircraft.com & www.toddmccutchanairshows.com
>
> From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@ma
tronics.com] On Behalf Of Todd McCutchan
> Sent: Friday, January 10, 2014 7:52 PM
> To: yak-list@matronics.com
> Subject: RE: Yak-List: Re: Yak 52 maneuver speed
>
> Maneuvering speed can be found mathematically. The formula is Vs (stall sp
eed clean) multiplied by the square root of the g (7). If you put it into an
excel formula it would be Vs*=88=9An where n = acceleration. You can t
hen use this to build a Vn diagram if you so choose.
>
> Good luck!
> Todd McCutchan
> Fast Aircraft
> T-34A & Yak-50
>
> Cell - 260.402.1740
>
> Email: todd@fastaircraft.com
> Skype: tmccutchan
> Web: www.fastaircraft.com & www.toddmccutchanairshows.com
>
> -----Original Message-----
> From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@ma
tronics.com] On Behalf Of Jim Burke
> Sent: Friday, January 10, 2014 5:37 PM
> To: yak-list@matronics.com
> Subject: Re: Yak-List: Re: Yak 52 maneuver speed
>
>
> Thanks but I'm looking for Va, the lowest speed at which you can generate t
he max allowable (7) g.
>
> Sent from my iPad
>
> > On Jan 10, 2014, at 14:32, "Etienne Verhellen" <janie@yak52.fr> wrote:
> >
> >
> > YAKOVLEVS Maximum Manoeuvring speeds ...
> >
> >
> > # Maximum Manoeuvring Speed YAK-52 : 360 KPH - 194 KTS
> > if uou're brave enough [Exclamation] [Wink]
> >
> > # Maximum Manoeuvring Speed YAK-50 : 300 KPH.
> >
> >
> > Cheers,
> >
> > Etienne.
> >
> > --------
> > http://forums.matronics.com/files/corsair_oe_eas_and_yak_52_g_cbss_212
> > .jpg
> > http://ukga.com/content/view?contentId=29581
> > http://ukga.com/images/content/image29581.jpg
> > http://www.flyredstar.org/gallery2/Yak/Etienne%20landing%20in%20YVR.jp
> > g
> >
> >
> >
> >
> > Read this topic online here:
> >
> > http://forums.matronics.com/viewtopic.php?p=416753#416753
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
>
>
>
>
> www.aeroelectric.comwww.buildersbooks.comwww.homebuilthelp.comwww.mypilots
tore.comwww.mrrace.comhref="http://www.matronics.com/contribution">http://
www.matronics.com/contribution
>
>
>
> http://www.matronics.com/Navigator?Yak-List
>
>
>
> http://forums.matronics.com
>
>
>
>
>
>
>
> www.aeroelectric.comwww.buildersbooks.comwww.homebuilthelp.comwww.mypilots
tore.comwww.mrrace.com
> http://www.matronics.com/contribution
> http://www.matronics.com/Navigator?Yak-List
> http://forums.matronics.com
Message 2
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| Subject: | Re: Yak 52 maneuver speed |
Found on Mark Jefferies website=0ABasic Data=0AAirspeeds =0ANever exceed sp
eed VNE 450 KPH 243 Kts =0AManeuvering speed 360 KPH 194 Kts =0AGear extens
ion speed 200 KPH 108 Kts =0AFlap extension speed 170 KHP 91 Kts =0AApproac
h speed 150 KPH 87 Kts =0AStall speed 105 KPH=C2- 60 Kts =0A=0A=0A=0AOn
Friday, January 10, 2014 10:12 PM, Todd McCutchan <todd@fastaircraft.com> w
rote:=0A =0APlease also keep in mind that stall speed (at least in USA air
craft) is calculated based on MTOW and farthest allowable aft CG. If you ar
e flying at weights below MTOW the Va will also be lower as it decreases as
weight decreases (rule of thumb is 1 knot per 100 lbs). =0A=C2-=0AAgain
you can calculate this using the same formula if you know the lower Vs or i
f Vs is unknown for the reduced weight you can calculate using =0AVa would
be the maneuvering speed you previously calculated based on MTOW. W2 is the
current weight and W1 is the MTOW.=0A=C2-=0ACheers!=0A=C2-=0ATodd McCu
tchan=0AFast Aircraft=0AT-34A & Yak-50=0A=C2-=0ACell - 260.402.1740=0A=C2
-=0AEmail:=C2- todd@fastaircraft.com =0ASkype:=C2- tmccutchan=0AWeb:
=C2- www.fastaircraft.com & www.toddmccutchanairshows.com =0A=C2-=0AFro
m:owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matroni
cs.com] On Behalf Of Todd McCutchan=0ASent: Friday, January 10, 2014 7:52 P
M=0ATo: yak-list@matronics.com=0ASubject: RE: Yak-List: Re: Yak 52 maneuver
speed=0A=C2-=0AManeuvering speed can be found mathematically. The formul
a is Vs (stall speed clean) multiplied by the square root of the g (7). If
you put it into an excel formula it would be Vs*=88=9An where n = acce
leration. You can then use this to build a Vn diagram if you so choose.=0A
=C2-=0AGood luck!=0ATodd McCutchan=0AFast Aircraft=0AT-34A & Yak-50=0A=C2
-=0ACell - 260.402.1740=0A=C2-=0AEmail:=C2- todd@fastaircraft.com =0A
Skype:=C2- tmccutchan=0AWeb:=C2- http://www.fastaircraft.com/ & http://
www.toddmccutchanairshows.com/ =0A=C2-=0A-----Original Message-----=0AFro
m: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matron
ics.com] On Behalf Of Jim Burke=0ASent: Friday, January 10, 2014 5:37 PM=0A
=0A=C2-=0AThanks but I'm looking for Va, the lowest speed at which you ca
n generate the max allowable (7) g. =0A=C2-=0ASent from my iPad=0A=C2-
=0A> On Jan 10, 2014, at 14:32, "Etienne Verhellen" <janie@yak52.fr> wrote:
fr>=0A> =0A> YAKOVLEVS Maximum Manoeuvring speeds ...=0A> =0A> =0A> #=C2-
Maximum Manoeuvring Speed YAK-52 : 360 KPH - 194 KTS=0A>=C2-=C2-=C2-
=C2- if uou're brave enough=C2-=C2- [Exclamation]=C2-=C2- [Wink]
=0A> =0A> #=C2- Maximum Manoeuvring Speed YAK-50 : 300 KPH.=0A> =0A> =0A>
Cheers,=0A> =0A> Etienne.=0A> =0A> --------=0A> http://forums.matronics.co
m/files/corsair_oe_eas_and_yak_52_g_cbss_212=0A> .jpg=0A> http://ukga.com/c
ontent/view?contentId=29581=0A> http://ukga.com/images/content/image29581
.jpg=0A> http://www.flyredstar.org/gallery2/Yak/Etienne%20landing%20in%20YV
R.jp=0A> g=0A> =0A> =0A> =0A> =0A> Read this topic online here:=0A> =0A> ht
tp://forums.matronics.com/viewtopic.php?p=416753#416753=0A> =0A> =0A> =0A
> =0A> =0A> =0A> =0A> =0A> =0A> =0A=C2-=0A=C2-=0A=C2-=0Awww.aeroelect
ric.comwww.buildersbooks.comwww.homebuilthelp.comwww.mypilotstore.comwww.mr
race.comhref="http://www.matronics.com/contribution">http://www.matronics
.com/contribution=0A=C2-=0Ahttp://www.matronics.com/Navigator?Yak-List=0A
=C2-=0Ahttp://forums.matronics.com/=0A=C2-=0A=C2-=0A=C2-=0A=C2-
=0A=C2-=0Awww.aeroelectric.com www.buildersbooks.com www.homebuilthelp.co
m www.mypilotstore.com www.mrrace.com=0Ahttp://www.matronics.com/contributi
on=0Ahttp://www.matronics.com/Navigator?Yak-List=0Ahttp://forums.matronics.
com
Message 3
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| Subject: | Re: Yak 52 maneuver speed |
194 knots for Va seems crazy high for plane with a 60 knot stall speed. I am
wondering if something is lost in translation?
Todd McCutchan
T-34A & Yak-50
Cell: (260) 402-1740
E-mail: todd@fastaircraft.com
www.fastaircraft.com
> On Jan 11, 2014, at 5:19 PM, bill wade <bwade154@yahoo.com> wrote:
>
> Found on Mark Jefferies website
>
> Basic Data
>
> Airspeeds
> Never exceed speed VNE
> 450 KPH
> 243 Kts
> Maneuvering speed
> 360 KPH
> 194 Kts
> Gear extension speed
> 200 KPH
> 108 Kts
> Flap extension speed
> 170 KHP
> 91 Kts
> Approach speed
> 150 KPH
> 87 Kts
> Stall speed
> 105 KPH
> 60 Kts
>
>
> On Friday, January 10, 2014 10:12 PM, Todd McCutchan <todd@fastaircraft.co
m> wrote:
> Please also keep in mind that stall speed (at least in USA aircraft) is ca
lculated based on MTOW and farthest allowable aft CG. If you are flying at w
eights below MTOW the Va will also be lower as it decreases as weight decrea
ses (rule of thumb is 1 knot per 100 lbs).
>
> Again you can calculate this using the same formula if you know the lower V
s or if Vs is unknown for the reduced weight you can calculate using <image0
03.png>
> Va would be the maneuvering speed you previously calculated based on MTOW.
W2 is the current weight and W1 is the MTOW.
>
> Cheers!
>
> Todd McCutchan
> Fast Aircraft
> T-34A & Yak-50
>
> Cell - 260.402.1740
>
> Email: todd@fastaircraft.com
> Skype: tmccutchan
> Web: www.fastaircraft.com & www.toddmccutchanairshows.com
>
> From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@ma
tronics.com] On Behalf Of Todd McCutchan
> Sent: Friday, January 10, 2014 7:52 PM
> To: yak-list@matronics.com
> Subject: RE: Yak-List: Re: Yak 52 maneuver speed
>
> Maneuvering speed can be found mathematically. The formula is Vs (stall sp
eed clean) multiplied by the square root of the g (7). If you put it into an
excel formula it would be Vs*=88=9An where n = acceleration. You can t
hen use this to build a Vn diagram if you so choose.
>
> Good luck!
> Todd McCutchan
> Fast Aircraft
> T-34A & Yak-50
>
> Cell - 260.402.1740
>
> Email: todd@fastaircraft.com
> Skype: tmccutchan
> Web: http://www.fastaircraft.com/ & http://www.toddmccutchanairshows.com/
>
> -----Original Message-----
> From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@ma
tronics.com] On Behalf Of Jim Burke
> Sent: Friday, January 10, 2014 5:37 PM
> To: yak-list@matronics.com
> Subject: Re: Yak-List: Re: Yak 52 maneuver speed
>
>
> Thanks but I'm looking for Va, the lowest speed at which you can generate t
he max allowable (7) g.
>
> Sent from my iPad
>
> > On Jan 10, 2014, at 14:32, "Etienne Verhellen" <janie@yak52.fr> wrote:
> >
> >
> > YAKOVLEVS Maximum Manoeuvring speeds ...
> >
> >
> > # Maximum Manoeuvring Speed YAK-52 : 360 KPH - 194 KTS
> > if uou're brave enough [Exclamation] [Wink]
> >
> > # Maximum Manoeuvring Speed YAK-50 : 300 KPH.
> >
> >
> > Cheers,
> >
> > Etienne.
> >
> > --------
> > http://forums.matronics.com/files/corsair_oe_eas_and_yak_52_g_cbss_212
> > .jpg
> > http://ukga.com/content/view?contentId=29581
> > http://ukga.com/images/content/image29581.jpg
> > http://www.flyredstar.org/gallery2/Yak/Etienne%20landing%20in%20YVR.jp
> > g
> >
> >
> >
> >
> > Read this topic online here:
> >
> > http://forums.matronics.com/viewtopic.php?p=416753#416753
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
>
>
>
> www.aeroelectric.comwww.buildersbooks.comwww.homebuilthelp.comwww.mypilots
tore.comwww.mrrace.comhref="http://www.matronics.com/contribution">http://
www.matronics.com/contribution
>
> http://www.matronics.com/Navigator?Yak-List
>
> http://forums.matronics.com/
>
>
>
>
>
> www.aeroelectric.com www.buildersbooks.com www.homebuilthelp.com www.mypil
otstore.com
> www.mrrace.com
> http://www.matronics.com/contribution
> http://www.matronics.com/Navigator?Yak-List
> http://forums.matronics.com
>
>
Message 4
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| Subject: | Re: Yak 52 maneuver speed |
Todd
If I remember correctly, maximum maneuver speed is a lot like our military c
orner velocity. At that speed you can just pull max G at stall angle of atta
ck. One knot above that and you over G. One knot below and you stall before r
eaching max G. 194 makes sense as 7 Gs is a lot and needs a head of steam to
achieve. Hope this helps.
Richard Hess
C 404-964-4885
On Jan 11, 2014, at 10:33, Todd McCutchan <todd@fastaircraft.com> wrote:
> 194 knots for Va seems crazy high for plane with a 60 knot stall speed. I a
m wondering if something is lost in translation?
>
> Todd McCutchan
> T-34A & Yak-50
> Cell: (260) 402-1740
> E-mail: todd@fastaircraft.com
> www.fastaircraft.com
>
>
>
> On Jan 11, 2014, at 5:19 PM, bill wade <bwade154@yahoo.com> wrote:
>
>> Found on Mark Jefferies website
>>
>> Basic Data
>>
>> Airspeeds
>> Never exceed speed VNE
>> 450 KPH
>> 243 Kts
>> Maneuvering speed
>> 360 KPH
>> 194 Kts
>> Gear extension speed
>> 200 KPH
>> 108 Kts
>> Flap extension speed
>> 170 KHP
>> 91 Kts
>> Approach speed
>> 150 KPH
>> 87 Kts
>> Stall speed
>> 105 KPH
>> 60 Kts
>>
>>
>> On Friday, January 10, 2014 10:12 PM, Todd McCutchan <todd@fastaircraft.c
om> wrote:
>> Please also keep in mind that stall speed (at least in USA aircraft) is c
alculated based on MTOW and farthest allowable aft CG. If you are flying at w
eights below MTOW the Va will also be lower as it decreases as weight decrea
ses (rule of thumb is 1 knot per 100 lbs).
>>
>> Again you can calculate this using the same formula if you know the lower
Vs or if Vs is unknown for the reduced weight you can calculate using <imag
e003.png>
>> Va would be the maneuvering speed you previously calculated based on MTOW
. W2 is the current weight and W1 is the MTOW.
>>
>> Cheers!
>>
>> Todd McCutchan
>> Fast Aircraft
>> T-34A & Yak-50
>>
>> Cell - 260.402.1740
>>
>> Email: todd@fastaircraft.com
>> Skype: tmccutchan
>> Web: www.fastaircraft.com & www.toddmccutchanairshows.com
>>
>> From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@m
atronics.com] On Behalf Of Todd McCutchan
>> Sent: Friday, January 10, 2014 7:52 PM
>> To: yak-list@matronics.com
>> Subject: RE: Yak-List: Re: Yak 52 maneuver speed
>>
>> Maneuvering speed can be found mathematically. The formula is Vs (stall s
peed clean) multiplied by the square root of the g (7). If you put it into a
n excel formula it would be Vs*=88=9An where n = acceleration. You can t
hen use this to build a Vn diagram if you so choose.
>>
>> Good luck!
>> Todd McCutchan
>> Fast Aircraft
>> T-34A & Yak-50
>>
>> Cell - 260.402.1740
>>
>> Email: todd@fastaircraft.com
>> Skype: tmccutchan
>> Web: http://www.fastaircraft.com/ & http://www.toddmccutchanairshows.com
/
>>
>> -----Original Message-----
>> From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@m
atronics.com] On Behalf Of Jim Burke
>> Sent: Friday, January 10, 2014 5:37 PM
>> To: yak-list@matronics.com
>> Subject: Re: Yak-List: Re: Yak 52 maneuver speed
>>
>>
>> Thanks but I'm looking for Va, the lowest speed at which you can generate
the max allowable (7) g.
>>
>> Sent from my iPad
>>
>> > On Jan 10, 2014, at 14:32, "Etienne Verhellen" <janie@yak52.fr> wrote:
>> >
>> >
>> > YAKOVLEVS Maximum Manoeuvring speeds ...
>> >
>> >
>> > # Maximum Manoeuvring Speed YAK-52 : 360 KPH - 194 KTS
>> > if uou're brave enough [Exclamation] [Wink]
>> >
>> > # Maximum Manoeuvring Speed YAK-50 : 300 KPH.
>> >
>> >
>> > Cheers,
>> >
>> > Etienne.
>> >
>> > --------
>> > http://forums.matronics.com/files/corsair_oe_eas_and_yak_52_g_cbss_212
>> > .jpg
>> > http://ukga.com/content/view?contentId=29581
>> > http://ukga.com/images/content/image29581.jpg
>> > http://www.flyredstar.org/gallery2/Yak/Etienne%20landing%20in%20YVR.jp
>> > g
>> >
>> >
>> >
>> >
>> > Read this topic online here:
>> >
>> > http://forums.matronics.com/viewtopic.php?p=416753#416753
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>>
Message 5
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| Subject: | Re: Yak 52 maneuver speed |
Va and cornering speed are indeed exactly the same.
However the math on this one does not pan out.
60 (Vs) x square root of 7 (max g) = 158.7 knots which is believable.
For Va to be 194 stall speed (Vs) would have to be substantially higher or t
he max g would have to be higher.
Something is clearly being lost here but I don't know what.
Todd McCutchan
T-34A & Yak-50
Cell: (260) 402-1740
E-mail: todd@fastaircraft.com
www.fastaircraft.com
> On Jan 11, 2014, at 6:47 PM, Richard Hess <hess737@aol.com> wrote:
>
> Todd
> If I remember correctly, maximum maneuver speed is a lot like our military
corner velocity. At that speed you can just pull max G at stall angle of at
tack. One knot above that and you over G. One knot below and you stall befor
e reaching max G. 194 makes sense as 7 Gs is a lot and needs a head of steam
to achieve. Hope this helps.
>
> Richard Hess
> C 404-964-4885
>
>> On Jan 11, 2014, at 10:33, Todd McCutchan <todd@fastaircraft.com> wrote:
>>
>> 194 knots for Va seems crazy high for plane with a 60 knot stall speed. I
am wondering if something is lost in translation?
>>
>> Todd McCutchan
>> T-34A & Yak-50
>> Cell: (260) 402-1740
>> E-mail: todd@fastaircraft.com
>> www.fastaircraft.com
>>
>>
>>
>>> On Jan 11, 2014, at 5:19 PM, bill wade <bwade154@yahoo.com> wrote:
>>>
>>> Found on Mark Jefferies website
>>>
>>> Basic Data
>>>
>>> Airspeeds
>>> Never exceed speed VNE
>>> 450 KPH
>>> 243 Kts
>>> Maneuvering speed
>>> 360 KPH
>>> 194 Kts
>>> Gear extension speed
>>> 200 KPH
>>> 108 Kts
>>> Flap extension speed
>>> 170 KHP
>>> 91 Kts
>>> Approach speed
>>> 150 KPH
>>> 87 Kts
>>> Stall speed
>>> 105 KPH
>>> 60 Kts
>>>
>>>
>>> On Friday, January 10, 2014 10:12 PM, Todd McCutchan <todd@fastaircraft.
com> wrote:
>>> Please also keep in mind that stall speed (at least in USA aircraft) is c
alculated based on MTOW and farthest allowable aft CG. If you are flying at w
eights below MTOW the Va will also be lower as it decreases as weight decrea
ses (rule of thumb is 1 knot per 100 lbs).
>>>
>>> Again you can calculate this using the same formula if you know the lowe
r Vs or if Vs is unknown for the reduced weight you can calculate using <ima
ge003.png>
>>> Va would be the maneuvering speed you previously calculated based on MTO
W. W2 is the current weight and W1 is the MTOW.
>>>
>>> Cheers!
>>>
>>> Todd McCutchan
>>> Fast Aircraft
>>> T-34A & Yak-50
>>>
>>> Cell - 260.402.1740
>>>
>>> Email: todd@fastaircraft.com
>>> Skype: tmccutchan
>>> Web: www.fastaircraft.com & www.toddmccutchanairshows.com
>>>
>>> From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@
matronics.com] On Behalf Of Todd McCutchan
>>> Sent: Friday, January 10, 2014 7:52 PM
>>> To: yak-list@matronics.com
>>> Subject: RE: Yak-List: Re: Yak 52 maneuver speed
>>>
>>> Maneuvering speed can be found mathematically. The formula is Vs (stall s
peed clean) multiplied by the square root of the g (7). If you put it into a
n excel formula it would be Vs*=88=9An where n = acceleration. You can t
hen use this to build a Vn diagram if you so choose.
>>>
>>> Good luck!
>>> Todd McCutchan
>>> Fast Aircraft
>>> T-34A & Yak-50
>>>
>>> Cell - 260.402.1740
>>>
>>> Email: todd@fastaircraft.com
>>> Skype: tmccutchan
>>> Web: http://www.fastaircraft.com/ & http://www.toddmccutchanairshows.co
m/
>>>
>>> -----Original Message-----
>>> From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@
matronics.com] On Behalf Of Jim Burke
>>> Sent: Friday, January 10, 2014 5:37 PM
>>> To: yak-list@matronics.com
>>> Subject: Re: Yak-List: Re: Yak 52 maneuver speed
>>>
>>>
>>> Thanks but I'm looking for Va, the lowest speed at which you can generat
e the max allowable (7) g.
>>>
>>> Sent from my iPad
>>>
>>> > On Jan 10, 2014, at 14:32, "Etienne Verhellen" <janie@yak52.fr> wrote:
>>> >
>>> >
>>> > YAKOVLEVS Maximum Manoeuvring speeds ...
>>> >
>>> >
>>> > # Maximum Manoeuvring Speed YAK-52 : 360 KPH - 194 KTS
>>> > if uou're brave enough [Exclamation] [Wink]
>>> >
>>> > # Maximum Manoeuvring Speed YAK-50 : 300 KPH.
>>> >
>>> >
>>> > Cheers,
>>> >
>>> > Etienne.
>>> >
>>> > --------
>>> > http://forums.matronics.com/files/corsair_oe_eas_and_yak_52_g_cbss_212
>>> > .jpg
>>> > http://ukga.com/content/view?contentId=29581
>>> > http://ukga.com/images/content/image29581.jpg
>>> > http://www.flyredstar.org/gallery2/Yak/Etienne%20landing%20in%20YVR.jp
>>> > g
>>> >
>>> >
>>> >
>>> >
>>> > Read this topic online here:
>>> >
>>> > http://forums.matronics.com/viewtopic.php?p=416753#416753
>>> >
>>> >
>>> >
>>> >
>>> >
>>> >
>>> >
>>> >
>>> >
>>> >
>
>
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Message 6
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|
| Subject: | Re: Yak 52 maneuver speed |
If 194 knots were actually used as maneuvering speed a maximum elevator defl
ection would generate 10.45 g's; clearly in excess of 7 g structural limit. T
his is a believable ultimate structural failure load though (generally struc
tural failure is 150% of certified g; at least in Western aircraft).
Again, something is not translating correctly.
Todd McCutchan
T-34A & Yak-50
Cell: (260) 402-1740
E-mail: todd@fastaircraft.com
www.fastaircraft.com
> On Jan 11, 2014, at 6:47 PM, Richard Hess <hess737@aol.com> wrote:
>
> Todd
> If I remember correctly, maximum maneuver speed is a lot like our military
corner velocity. At that speed you can just pull max G at stall angle of at
tack. One knot above that and you over G. One knot below and you stall befor
e reaching max G. 194 makes sense as 7 Gs is a lot and needs a head of steam
to achieve. Hope this helps.
>
> Richard Hess
> C 404-964-4885
>
>> On Jan 11, 2014, at 10:33, Todd McCutchan <todd@fastaircraft.com> wrote:
>>
>> 194 knots for Va seems crazy high for plane with a 60 knot stall speed. I
am wondering if something is lost in translation?
>>
>> Todd McCutchan
>> T-34A & Yak-50
>> Cell: (260) 402-1740
>> E-mail: todd@fastaircraft.com
>> www.fastaircraft.com
>>
>>
>>
>>> On Jan 11, 2014, at 5:19 PM, bill wade <bwade154@yahoo.com> wrote:
>>>
>>> Found on Mark Jefferies website
>>>
>>> Basic Data
>>>
>>> Airspeeds
>>> Never exceed speed VNE
>>> 450 KPH
>>> 243 Kts
>>> Maneuvering speed
>>> 360 KPH
>>> 194 Kts
>>> Gear extension speed
>>> 200 KPH
>>> 108 Kts
>>> Flap extension speed
>>> 170 KHP
>>> 91 Kts
>>> Approach speed
>>> 150 KPH
>>> 87 Kts
>>> Stall speed
>>> 105 KPH
>>> 60 Kts
>>>
>>>
>>> On Friday, January 10, 2014 10:12 PM, Todd McCutchan <todd@fastaircraft.
com> wrote:
>>> Please also keep in mind that stall speed (at least in USA aircraft) is c
alculated based on MTOW and farthest allowable aft CG. If you are flying at w
eights below MTOW the Va will also be lower as it decreases as weight decrea
ses (rule of thumb is 1 knot per 100 lbs).
>>>
>>> Again you can calculate this using the same formula if you know the lowe
r Vs or if Vs is unknown for the reduced weight you can calculate using <ima
ge003.png>
>>> Va would be the maneuvering speed you previously calculated based on MTO
W. W2 is the current weight and W1 is the MTOW.
>>>
>>> Cheers!
>>>
>>> Todd McCutchan
>>> Fast Aircraft
>>> T-34A & Yak-50
>>>
>>> Cell - 260.402.1740
>>>
>>> Email: todd@fastaircraft.com
>>> Skype: tmccutchan
>>> Web: www.fastaircraft.com & www.toddmccutchanairshows.com
>>>
>>> From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@
matronics.com] On Behalf Of Todd McCutchan
>>> Sent: Friday, January 10, 2014 7:52 PM
>>> To: yak-list@matronics.com
>>> Subject: RE: Yak-List: Re: Yak 52 maneuver speed
>>>
>>> Maneuvering speed can be found mathematically. The formula is Vs (stall s
peed clean) multiplied by the square root of the g (7). If you put it into a
n excel formula it would be Vs*=88=9An where n = acceleration. You can t
hen use this to build a Vn diagram if you so choose.
>>>
>>> Good luck!
>>> Todd McCutchan
>>> Fast Aircraft
>>> T-34A & Yak-50
>>>
>>> Cell - 260.402.1740
>>>
>>> Email: todd@fastaircraft.com
>>> Skype: tmccutchan
>>> Web: http://www.fastaircraft.com/ & http://www.toddmccutchanairshows.co
m/
>>>
>>> -----Original Message-----
>>> From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@
matronics.com] On Behalf Of Jim Burke
>>> Sent: Friday, January 10, 2014 5:37 PM
>>> To: yak-list@matronics.com
>>> Subject: Re: Yak-List: Re: Yak 52 maneuver speed
>>>
>>>
>>> Thanks but I'm looking for Va, the lowest speed at which you can generat
e the max allowable (7) g.
>>>
>>> Sent from my iPad
>>>
>>> > On Jan 10, 2014, at 14:32, "Etienne Verhellen" <janie@yak52.fr> wrote:
>>> >
>>> >
>>> > YAKOVLEVS Maximum Manoeuvring speeds ...
>>> >
>>> >
>>> > # Maximum Manoeuvring Speed YAK-52 : 360 KPH - 194 KTS
>>> > if uou're brave enough [Exclamation] [Wink]
>>> >
>>> > # Maximum Manoeuvring Speed YAK-50 : 300 KPH.
>>> >
>>> >
>>> > Cheers,
>>> >
>>> > Etienne.
>>> >
>>> > --------
>>> > http://forums.matronics.com/files/corsair_oe_eas_and_yak_52_g_cbss_212
>>> > .jpg
>>> > http://ukga.com/content/view?contentId=29581
>>> > http://ukga.com/images/content/image29581.jpg
>>> > http://www.flyredstar.org/gallery2/Yak/Etienne%20landing%20in%20YVR.jp
>>> > g
>>> >
>>> >
>>> >
>>> >
>>> > Read this topic online here:
>>> >
>>> > http://forums.matronics.com/viewtopic.php?p=416753#416753
>>> >
>>> >
>>> >
>>> >
>>> >
>>> >
>>> >
>>> >
>>> >
>>> >
>
>
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Message 7
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|
| Subject: | Re: Yak 52 maneuver speed |
Me neither. It could be that the particular wing and fuselage bleeds so muc
h energy that a higher speed is necessary to initially achieve the max G. R
egardless, if you're pulling more than 4-5 Gs during classic aerobatics you
're doing something wrong... :-)
Richard Hess
President
International Jets, Inc.
Cell 404-964-4885
-----Original Message-----
From: Todd McCutchan <todd@fastaircraft.com>
Sent: Sat, Jan 11, 2014 11:19 am
Subject: Re: Yak-List: Re: Yak 52 maneuver speed
Va and cornering speed are indeed exactly the same.
However the math on this one does not pan out.
60 (Vs) x square root of 7 (max g) = 158.7 knots which is believable.
For Va to be 194 stall speed (Vs) would have to be substantially higher or
the max g would have to be higher.
Something is clearly being lost here but I don't know what.
Todd McCutchan
T-34A & Yak-50
Cell: (260) 402-1740
E-mail: todd@fastaircraft.com
www.fastaircraft.com
On Jan 11, 2014, at 6:47 PM, Richard Hess <hess737@aol.com> wrote:
Todd
If I remember correctly, maximum maneuver speed is a lot like our military
corner velocity. At that speed you can just pull max G at stall angle of at
tack. One knot above that and you over G. One knot below and you stall befo
re reaching max G. 194 makes sense as 7 Gs is a lot and needs a head of ste
am to achieve. Hope this helps.
Richard Hess
C 404-964-4885
On Jan 11, 2014, at 10:33, Todd McCutchan <todd@fastaircraft.com> wrote:
194 knots for Va seems crazy high for plane with a 60 knot stall speed. I a
m wondering if something is lost in translation?
Todd McCutchan
T-34A & Yak-50
Cell: (260) 402-1740
E-mail: todd@fastaircraft.com
www.fastaircraft.com
On Jan 11, 2014, at 5:19 PM, bill wade <bwade154@yahoo.com> wrote:
Found on Mark Jefferies website
Basic Data
Airspeeds
Never exceed speed VNE
450 KPH
243 Kts
Maneuvering speed
360 KPH
194 Kts
Gear extension speed
200 KPH
108 Kts
Flap extension speed
170 KHP
91 Kts
Approach speed
150 KPH
87 Kts
Stall speed
105 KPH
60 Kts
On Friday, January 10, 2014 10:12 PM, Todd McCutchan <todd@fastaircraft.com
> wrote:
Please also keep in mind that stall speed (at least in USA aircraft) is cal
culated based on MTOW and farthest allowable aft CG. If you are flying at w
eights below MTOW the Va will also be lower as it decreases as weight decre
ases (rule of thumb is 1 knot per 100 lbs).
Again you can calculate this using the same formula if you know the lower V
s or if Vs is unknown for the reduced weight you can calculate using <image
003.png>
Va would be the maneuvering speed you previously calculated based on MTOW.
W2 is the current weight and W1 is the MTOW.
Cheers!
Todd McCutchan
Fast Aircraft
T-34A & Yak-50
Cell - 260.402.1740
Email: todd@fastaircraft.com
Skype: tmccutchan
Web: www.fastaircraft.com & www.toddmccutchanairshows.com
From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@mat
ronics.com] On Behalf Of Todd McCutchan
Sent: Friday, January 10, 2014 7:52 PM
Subject: RE: Yak-List: Re: Yak 52 maneuver speed
Maneuvering speed can be found mathematically. The formula is Vs (stall spe
ed clean) multiplied by the square root of the g (7). If you put it into an
excel formula it would be Vs*=88=9An where n = acceleration. You can
then use this to build a Vn diagram if you so choose.
Good luck!
Todd McCutchan
Fast Aircraft
T-34A & Yak-50
Cell - 260.402.1740
Email: todd@fastaircraft.com
Skype: tmccutchan
Web: http://www.fastaircraft.com/ & http://www.toddmccutchanairshows.com/
-----Original Message-----
From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@mat
ronics.com] On Behalf Of Jim Burke
Sent: Friday, January 10, 2014 5:37 PM
Subject: Re: Yak-List: Re: Yak 52 maneuver speed
Thanks but I'm looking for Va, the lowest speed at which you can generate t
he max allowable (7) g.
Sent from my iPad
> On Jan 10, 2014, at 14:32, "Etienne Verhellen" <janie@yak52.fr> wrote:
>
>
> YAKOVLEVS Maximum Manoeuvring speeds ...
>
>
> # Maximum Manoeuvring Speed YAK-52 : 360 KPH - 194 KTS
> if uou're brave enough [Exclamation] [Wink]
>
> # Maximum Manoeuvring Speed YAK-50 : 300 KPH.
>
>
> Cheers,
>
> Etienne.
>
> --------
> http://forums.matronics.com/files/corsair_oe_eas_and_yak_52_g_cbss_212
> .jpg
> http://ukga.com/content/view?contentId=29581
> http://ukga.com/images/content/image29581.jpg
> http://www.flyredstar.org/gallery2/Yak/Etienne%20landing%20in%20YVR.jp
> g
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=416753#416753
>
>
>
>
>
>
>
>
>
>
D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3
D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3
D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3
D
t;">www.aeroelectric.com
ooks.com"">www.buildersbooks.com
uot;">www.homebuilthelp.com
uot;">www.mypilotstore.com
>www.mrrace.com
t;">http://www.matronics.com/contribution
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
st"">http://www.matronics.com/Navigator?Yak-List
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
/forums.matronics.com
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
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Message 8
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|
| Subject: | Re: Yak 52 maneuver speed |
It actually has nothing to do with aircraft design (at this stage) and Va ha
s nothing to do with sustained g, it is instantaneous g caused by rapid and f
ull deflection of a control surface.
Just like a B-52 and an F-16 both have the exact same turn radius at 400 kno
ts if both are pulling 4 g's the math for finding Va and turn radius, etc is
just that. Math.
As I previously posted burying the stick at 157 knots will yield 7 g's with a
60 knot Vs and doing so at 194 KIAS will give you 10.45.
I would strongly discourage anyone from using 194 as Va.
Of course I have been wrong before...
Todd McCutchan
T-34A & Yak-50
Cell: (260) 402-1740
E-mail: todd@fastaircraft.com
www.fastaircraft.com
> On Jan 11, 2014, at 7:27 PM, Richard Hess <hess737@aol.com> wrote:
>
> Me neither. It could be that the particular wing and fuselage bleeds so mu
ch energy that a higher speed is necessary to initially achieve the max G. R
egardless, if you're pulling more than 4-5 Gs during classic aerobatics you'
re doing something wrong... :-)
>
> Richard Hess
> President
> International Jets, Inc.
> Cell 404-964-4885
>
>
> -----Original Message-----
> From: Todd McCutchan <todd@fastaircraft.com>
> To: yak-list <yak-list@matronics.com>
> Sent: Sat, Jan 11, 2014 11:19 am
> Subject: Re: Yak-List: Re: Yak 52 maneuver speed
>
> Va and cornering speed are indeed exactly the same.
>
> However the math on this one does not pan out.
>
> 60 (Vs) x square root of 7 (max g) = 158.7 knots which is believable.
>
> For Va to be 194 stall speed (Vs) would have to be substantially higher or
the max g would have to be higher.
>
> Something is clearly being lost here but I don't know what.
>
> Todd McCutchan
> T-34A & Yak-50
> Cell: (260) 402-1740
> E-mail: todd@fastaircraft.com
> www.fastaircraft.com
>
>
>
> On Jan 11, 2014, at 6:47 PM, Richard Hess <hess737@aol.com> wrote:
>
>> Todd
>> If I remember correctly, maximum maneuver speed is a lot like our militar
y corner velocity. At that speed you can just pull max G at stall angle of a
ttack. One knot above that and you over G. One knot below and you stall befo
re reaching max G. 194 makes sense as 7 Gs is a lot and needs a head of stea
m to achieve. Hope this helps.
>>
>> Richard Hess
>> C 404-964-4885
>>
>> On Jan 11, 2014, at 10:33, Todd McCutchan <todd@fastaircraft.com> wrote:
>>
>>> 194 knots for Va seems crazy high for plane with a 60 knot stall speed. I
am wondering if something is lost in translation?
>>>
>>> Todd McCutchan
>>> T-34A & Yak-50
>>> Cell: (260) 402-1740
>>> E-mail: todd@fastaircraft.com
>>> www.fastaircraft.com
>>>
>>>
>>>
>>> On Jan 11, 2014, at 5:19 PM, bill wade <bwade154@yahoo.com> wrote:
>>>
>>>> Found on Mark Jefferies website
>>>>
>>>> Basic Data
>>>>
>>>> Airspeeds
>>>> Never exceed speed VNE
>>>> 450 KPH
>>>> 243 Kts
>>>> Maneuvering speed
>>>> 360 KPH
>>>> 194 Kts
>>>> Gear extension speed
>>>> 200 KPH
>>>> 108 Kts
>>>> Flap extension speed
>>>> 170 KHP
>>>> 91 Kts
>>>> Approach speed
>>>> 150 KPH
>>>> 87 Kts
>>>> Stall speed
>>>> 105 KPH
>>>> 60 Kts
>>>>
>>>>
>>>> On Friday, January 10, 2014 10:12 PM, Todd McCutchan <todd@fastaircraft
.com> wrote:
>>>> Please also keep in mind that stall speed (at least in USA aircraft) is
calculated based on MTOW and farthest allowable aft CG. If you are flying a
t weights below MTOW the Va will also be lower as it decreases as weight dec
reases (rule of thumb is 1 knot per 100 lbs).
>>>>
>>>> Again you can calculate this using the same formula if you know the low
er Vs or if Vs is unknown for the reduced weight you can calculate using <im
age003.png>
>>>> Va would be the maneuvering speed you previously calculated based on MT
OW. W2 is the current weight and W1 is the MTOW.
>>>>
>>>> Cheers!
>>>>
>>>> Todd McCutchan
>>>> Fast Aircraft
>>>> T-34A & Yak-50
>>>>
>>>> Cell - 260.402.1740
>>>>
>>>> Email: todd@fastaircraft.com
>>>> Skype: tmccutchan
>>>> Web: www.fastaircraft.com & www.toddmccutchanairshows.com
>>>>
>>>> From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server
@matronics.com] On Behalf Of Todd McCutchan
>>>> Sent: Friday, January 10, 2014 7:52 PM
>>>> To: yak-list@matronics.com
>>>> Subject: RE: Yak-List: Re: Yak 52 maneuver speed
>>>>
>>>> Maneuvering speed can be found mathematically. The formula is Vs (stall
speed clean) multiplied by the square root of the g (7). If you put it into
an excel formula it would be Vs*=88=9An where n = acceleration. You ca
n then use this to build a Vn diagram if you so choose.
>>>>
>>>> Good luck!
>>>> Todd McCutchan
>>>> Fast Aircraft
>>>> T-34A & Yak-50
>>>>
>>>> Cell - 260.402.1740
>>>>
>>>> Email: todd@fastaircraft.com
>>>> Skype: tmccutchan
>>>> Web: http://www.fastaircraft.com/ & http://www.toddmccutchanairshows.c
om/
>>>>
>>>> -----Original Message-----
>>>> From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server
@matronics.com] On Behalf Of Jim Burke
>>>> Sent: Friday, January 10, 2014 5:37 PM
>>>> To: yak-list@matronics.com
>>>> Subject: Re: Yak-List: Re: Yak 52 maneuver speed
>>>>
>>>>
>>>> Thanks but I'm looking for Va, the lowest speed at which you can genera
te the max allowable (7) g.
>>>>
>>>> Sent from my iPad
>>>>
>>>> > On Jan 10, 2014, at 14:32, "Etienne Verhellen" <janie@yak52.fr> wrote
:
>>>> >
>>>> >
>>>> > YAKOVLEVS Maximum Manoeuvring speeds ...
>>>> >
>>>> >
>>>> > # Maximum Manoeuvring Speed YAK-52 : 360 KPH - 194 KTS
>>>> > if uou're brave enough [Exclamation] [Wink]
>>>> >
>>>> > # Maximum Manoeuvring Speed YAK-50 : 300 KPH.
>>>> >
>>>> >
>>>> > Cheers,
>>>> >
>>>> > Etienne.
>>>> >
>>>> > --------
>>>> > http://forums.matronics.com/files/corsair_oe_eas_and_yak_52_g_cbss_21
2
>>>> > .jpg
>>>> > http://ukga.com/content/view?contentId=29581
>>>> > http://ukga.com/images/content/image29581.jpg
>>>> > http://www.flyredstar.org/gallery2/Yak/Etienne%20landing%20in%20YVR.j
p
>>>> > g
>>>> >
>>>> >
>>>> >
>>>> >
>>>> > Read this topic online here:
>>>> >
>>>> > http://forums.matronics.com/viewtopic.php?p=416753#416753
>>>> >
>>>> >
>>>> >
>>>> >
>>>> >
>>>> >
>>>> >
>>>> >
>>>> >
>>>> >
>>
>>
>> D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
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>> ot;">www.aeroelectric.com
>> books.com"">www.buildersbooks.com
>> quot;">www.homebuilthelp.com
>> quot;">www.mypilotstore.com
>> ">www.mrrace.com
>> ot;">http://www.matronics.com/contribution
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>> //forums.matronics.com
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>
>
> _blank>www.aeroelectric.com
> /" target=_blank>www.buildersbooks.com
> =_blank>www.homebuilthelp.com
> =_blank>www.mypilotstore.com
> ank>www.mrrace.com
> blank>http://www.matronics.com/contribution
> et=_blank>http://www.matronics.com/Navigator?Yak-List
> p://forums.matronics.com
>
>
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Message 9
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| Subject: | Re: Yak 52 maneuver speed |
iVBORw0KGgoAAAANSUhEUgAAADcAAAAtCAMAAAA9SAOJAAAAAXNSR0IArs4c6QAAAG9QTFRFAAAA
H0l9H0mUH0mqH2uUH2vBH4uqH4vVS0l9S0mUS0mqS2vBS4vVS6nBS6nqc0l9c0mUc0mqc2vBc4t9
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<pre><b><font size=2 color="#000000" face="courier new,courier">
</b></font></pre></body></html>
Message 10
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|
| Subject: | Back Up Scuba Bottle |
There is a CJ advertising for sale with "internal mounted scuba bottle back-
up". Does anyone know how this back up bottle is connected to the air system
? Pro and con?
Thanks,
Robin
Sent from my iPad
Message 11
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| Subject: | Back Up Scuba Bottle |
Frequently it is just installed in the baggage compartment and you use
it the normal way (outside fill port) when needed. But each set up is
different.
Bear
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Robin Hou
Sent: Saturday, January 11, 2014 12:30 PM
Subject: Yak-List: Back Up Scuba Bottle
There is a CJ advertising for sale with "internal mounted scuba bottle
back-up". Does anyone know how this back up bottle is connected to the
air system? Pro and con?
Thanks,
Robin
Sent from my iPad
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Message 12
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| Subject: | Re: Back Up Scuba Bottle |
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Message 13
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|
| Subject: | Re: Yak 52 maneuver speed |
Good discussion. Anyone who plans to flys their airplane near max performanc
e needs to have a good understanding of the available g's in all flight reg
imes. Corner speed is probably the most critical since it gives you the spe
ed for max g's. Below it and you are limited in low altitude pull outs and o
ther situations which could be critical.
Sent from my iPad
> On Jan 10, 2014, at 22:05, "Todd McCutchan" <todd@fastaircraft.com> wrote:
>
> Please also keep in mind that stall speed (at least in USA aircraft) is ca
lculated based on MTOW and farthest allowable aft CG. If you are flying at w
eights below MTOW the Va will also be lower as it decreases as weight decrea
ses (rule of thumb is 1 knot per 100 lbs).
>
> Again you can calculate this using the same formula if you know the lower V
s or if Vs is unknown for the reduced weight you can calculate using <image0
03.png>
> Va would be the maneuvering speed you previously calculated based on MTOW.
W2 is the current weight and W1 is the MTOW.
>
> Cheers!
>
> Todd McCutchan
> Fast Aircraft
> T-34A & Yak-50
>
> Cell - 260.402.1740
>
> Email: todd@fastaircraft.com
> Skype: tmccutchan
> Web: www.fastaircraft.com & www.toddmccutchanairshows.com
>
> From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@ma
tronics.com] On Behalf Of Todd McCutchan
> Sent: Friday, January 10, 2014 7:52 PM
> To: yak-list@matronics.com
> Subject: RE: Yak-List: Re: Yak 52 maneuver speed
>
> Maneuvering speed can be found mathematically. The formula is Vs (stall sp
eed clean) multiplied by the square root of the g (7). If you put it into an
excel formula it would be Vs*=88=9An where n = acceleration. You can t
hen use this to build a Vn diagram if you so choose.
>
> Good luck!
> Todd McCutchan
> Fast Aircraft
> T-34A & Yak-50
>
> Cell - 260.402.1740
>
> Email: todd@fastaircraft.com
> Skype: tmccutchan
> Web: www.fastaircraft.com & www.toddmccutchanairshows.com
>
> -----Original Message-----
> From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@ma
tronics.com] On Behalf Of Jim Burke
> Sent: Friday, January 10, 2014 5:37 PM
> To: yak-list@matronics.com
> Subject: Re: Yak-List: Re: Yak 52 maneuver speed
>
>
> Thanks but I'm looking for Va, the lowest speed at which you can generate t
he max allowable (7) g.
>
> Sent from my iPad
>
> > On Jan 10, 2014, at 14:32, "Etienne Verhellen" <janie@yak52.fr> wrote:
> >
> >
> > YAKOVLEVS Maximum Manoeuvring speeds ...
> >
> >
> > # Maximum Manoeuvring Speed YAK-52 : 360 KPH - 194 KTS
> > if uou're brave enough [Exclamation] [Wink]
> >
> > # Maximum Manoeuvring Speed YAK-50 : 300 KPH.
> >
> >
> > Cheers,
> >
> > Etienne.
> >
> > --------
> > http://forums.matronics.com/files/corsair_oe_eas_and_yak_52_g_cbss_212
> > .jpg
> > http://ukga.com/content/view?contentId=29581
> > http://ukga.com/images/content/image29581.jpg
> > http://www.flyredstar.org/gallery2/Yak/Etienne%20landing%20in%20YVR.jp
> > g
> >
> >
> >
> >
> > Read this topic online here:
> >
> > http://forums.matronics.com/viewtopic.php?p=416753#416753
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
>
>
>
>
> www.aeroelectric.comwww.buildersbooks.comwww.homebuilthelp.comwww.mypilots
tore.comwww.mrrace.comhref="http://www.matronics.com/contribution">http://
www.matronics.com/contribution
>
>
>
> http://www.matronics.com/Navigator?Yak-List
>
>
>
> http://forums.matronics.com
>
>
>
>
>
>
>
> www.aeroelectric.comwww.buildersbooks.comwww.homebuilthelp.comwww.mypilots
tore.comwww.mrrace.com
> http://www.matronics.com/contribution
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> http://forums.matronics.com
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| Subject: | Re: Yak 52 maneuver speed |
Hi all=0A=C2-=0AManoeuvre speed is a defined speed in the design of the a
ircraft, if using standards such as FAR 23 / CS23. The Russian definition m
ay well differ. Va is a single speed, and does not vary with aircraft weigh
t or CG. =0A=C2-=0AAlthough the speed is usually defined in terms of the
formula Vs*=88=9An, this represents the minimum Va. It may be higher tha
n that, if the designer elects to designate=C2-a higher number. (See FAR
23.335(c)). This may well be the case of an aerobatic aircraft?=0A=C2-=0A
The speed that most pilots would describe as "manoeuvre speed" is now defin
ed as "operating moneuvering speed", Vo. (See FAR 23.1507). =0A=C2-=0ATo
quote the FAA Advisory Circular (23-19):=0A48. What is the design maneuveri
ng speed VA?=0Aa. The design maneuvering speed is a value chosen by the app
licant. It may not=0Abe less than Vs=88=9A n and need not be greater tha
n Vc, but it could be greater if the applicant=0Achose the higher value. Th
e loads resulting from full control surface deflections at VA are=0Aused to
design the empennage and ailerons in part 23, =C2=A7=C2=A7 23.423, 23.441,
and 23.455.=0A=C2-=0Ab. VA should not be interpreted as a speed that wou
ld permit the pilot=0Aunrestricted flight-control movement without exceedin
g airplane structural limits, nor=0Ashould it be interpreted as a gust pene
tration speed. Only if VA = Vs =88=9An will the airplane=0Astall in a
nose-up pitching maneuver at, or near, limit load factor. For airplanes whe
re=0AVA>VS=88=9An, the pilot would have to check the maneuver; otherwise
the airplane would=0Aexceed the limit load factor.=0A=C2-=0Ac. Amendment
23-45 added the operating maneuvering speed, VO, in =C2=A7 23.1507.=0AVO i
s established not greater than VS=88=9An, and it is a speed where the ai
rplane will stall in a=0Anose-up pitching maneuver before exceeding the air
plane structural limits.=0A=C2-=0AHopefully this doesn't complicate thing
s too much.=0A=C2-=0ABlue skies=0AMike Beresford=0A=0A=0A=0AOn Sunday, 12
January 2014, 12:47, Jim Burke <jbyak52@gmail.com> wrote:=0A =0AGood disc
ussion. Anyone who plans to flys their airplane near max performance needs
to have a good understanding of the available =C2-g's in all flight regim
es. =C2-Corner speed is probably the most critical since it gives you the
speed for max g's. Below it and you are limited in low altitude pull outs
and other situations which could be critical.=C2-=0A=0ASent from my iPad
=0A=0AOn Jan 10, 2014, at 22:05, "Todd McCutchan" <todd@fastaircraft.com> w
rote:=0A=0A=0APlease also keep in mind that stall speed (at least in USA ai
rcraft) is calculated based on MTOW and farthest allowable aft CG. If you a
re flying at weights below MTOW the Va will also be lower as it decreases a
s weight decreases (rule of thumb is 1 knot per 100 lbs). =0A>=C2-=0A>Aga
in you can calculate this using the same formula if you know the lower Vs o
r if Vs is unknown for the reduced weight you can calculate using <image003
.png>=0A>Va would be the maneuvering speed you previously calculated based
on MTOW. W2 is the current weight and W1 is the MTOW.=0A>=C2-=0A>Cheers!
=0A>=C2-=0A>Todd McCutchan=0A>Fast Aircraft=0A>T-34A & Yak-50=0A>=C2-
=0A>Cell - 260.402.1740=0A>=C2-=0A>Email:=C2- todd@fastaircraft.com =0A
>Skype:=C2- tmccutchan=0A>Web:=C2- www.fastaircraft.com & www.toddmccut
chanairshows.com =0A>=C2-=0A>From:owner-yak-list-server@matronics.com [ma
ilto:owner-yak-list-server@matronics.com] On Behalf Of Todd McCutchan=0A>Se
nt: Friday, January 10, 2014 7:52 PM=0A>To: yak-list@matronics.com=0A>Subje
ct: RE: Yak-List: Re: Yak 52 maneuver speed=0A>=C2-=0A>Maneuvering speed
can be found mathematically. The formula is Vs (stall speed clean) multipli
ed by the square root of the g (7). If you put it into an excel formula it
would be Vs*=88=9An where n = acceleration. You can then use this to b
uild a Vn diagram if you so choose.=0A>=C2-=0A>Good luck!=0A>Todd McCutch
an=0A>Fast Aircraft=0A>T-34A & Yak-50=0A>=C2-=0A>Cell - 260.402.1740=0A>
=C2-=0A>Email:=C2- todd@fastaircraft.com =0A>Skype:=C2- tmccutchan=0A
>Web:=C2- http://www.fastaircraft.com/ & http://www.toddmccutchanairshows
.com/ =0A>=C2-=0A>-----Original Message-----=0A>From: owner-yak-list-serv
er@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of
Jim Burke=0A>Sent: Friday, January 10, 2014 5:37 PM=0A>To: yak-list@matroni
cs.com=0A>Subject: Re: Yak-List: Re: Yak 52 maneuver speed=0A>=C2-=0A>-->
Yak-List message posted by: Jim Burke <jbyak52@gmail.com>=0A>=C2-=0A>Tha
nks but I'm looking for Va, the lowest speed at which you can generate the
max allowable (7) g. =0A>=C2-=0A>Sent from my iPad=0A>=C2-=0A>> On Jan
10, 2014, at 14:32, "Etienne Verhellen" <janie@yak52.fr> wrote:=0A>> =0A>>
=0A>> YAKOVLEVS Maximum Manoeuvring speeds ...=0A>> =0A>> =0A>> #=C2- Max
imum Manoeuvring Speed YAK-52 : 360 KPH - 194 KTS=0A>>=C2-=C2-=C2-=C2
- if uou're brave enough=C2-=C2- [Exclamation]=C2-=C2- [Wink] =0A
>> =0A>> #=C2- Maximum Manoeuvring Speed YAK-50 : 300 KPH.=0A>> =0A>> =0A
>> Cheers,=0A>> =0A>> Etienne.=0A>> =0A>> --------=0A>> http://forums.matro
nics.com/files/corsair_oe_eas_and_yak_52_g_cbss_212=0A>> .jpg=0A>> http://u
kga.com/content/view?contentId=29581=0A>> http://ukga.com/images/content/
image29581.jpg=0A>> http://www.flyredstar.org/gallery2/Yak/Etienne%20landin
g%20in%20YVR.jp=0A>> g=0A>> =0A>> =0A>> =0A>> =0A>> Read this topic online
here:=0A>> =0A>> http://forums.matronics.com/viewtopic.php?p=416753#41675
3=0A>> =0A>> =0A>> =0A>> =0A>> =0A>> =0A>> =0A>> =0A>> =0A>> =0A>=C2-=0A>
=C2-=0A>=C2-=0A>http://www.aeroelectric.com/www.buildersbooks.comwww.ho
mebuilthelp.comwww.mypilotstore.comwww.mrrace.comhref="http://www.matroni
cs.com/contribution">http://www.matronics.com/contribution=0A>=C2-=0A>htt
p://www.matronics.com/Navigator?Yak-List=0A>=C2-=0A>http://forums.matroni
cs.com/=0A>=C2-=0A>=C2-=0A>=C2-=0A>=C2-=0A>=C2-=0A>http://www.aer
oelectric.com/http://www.buildersbooks.com/http://www.homebuilthelp.com/htt
p://www.mypilotstore.com/http://www.mrrace.com/=0A>http://www.matronics.com
/contribution=0A>http://www.matronics.com/Navigator?Yak-List=0A>http://foru
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