Today's Message Index:
----------------------
1. 07:03 AM - Re: YAK55m Wing attachment bolts. (George Coy)
2. 12:54 PM - Switching from a yak52 to a yak55 (Olivier Vigneron)
3. 01:09 PM - Re: Switching from a yak52 to a yak55 (theDicePilot .)
4. 01:18 PM - Re: Switching from a yak52 to a yak55 (Olivier Vigneron)
5. 02:27 PM - Re: Switching from a yak52 to a yak55 (Etienne Verhellen)
6. 02:48 PM - Re: Switching from a yak52 to a yak55 (Etienne Verhellen)
7. 08:24 PM - Re: Re: Switching from a yak52 to a yak55 (William Halverson)
8. 08:42 PM - Re: Re: Switching from a yak52 to a yak55 (theDicePilot .)
9. 08:57 PM - Re: Switching from a yak52 to a yak55 (Jan Mevis)
10. 09:02 PM - Cold Cylinder - housei (Gil Lipaz)
11. 09:30 PM - Re:Cold Cylinder (Frank Stelwagon)
12. 11:09 PM - Re: Re: Switching from a yak52 to a yak55 (Richard Goode)
Message 1
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| Subject: | YAK55m Wing attachment bolts. |
Steve, Contact me off list with the dimensions of your bolts. I have a
collection of -52 and -55 spar bolts
George Coy
CAS Ltd.
714 Airport Rd.
Swanton VT 05488
802-868-5633 off
802-363-5782 cell
802-868-4465 Fax
george.coy@gmail.com
http://coyacft.com/ <http://coyafct.com/>
SKYPE george.coy
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Walter Lannon
Sent: Wednesday, December 11, 2013 1:43 AM
Subject: Re: Yak-List: YAK55m Wing attachment bolts.
Dennis & Steve;
The information Dennis has supplied is correct but since it is a subject
not generally understood by many in the aviation industry I thought it
may help to expand on it a bit.
The term =9Ctorque=9D refers to a rotational method of
measuring the amount of elongation (stretch) of a bolt as the nut is
tightened. It applies to joints primarily subject to tensile loading
and therefore has no true relevance to a joint that is primarily loaded
in shear. In highly critical tension applications (e.g.: Some engine
connecting rod bolts, some split hub propellor bolts, etc.) the
=9Ctorque=99' method is not accurate enough and bolt stretch
is directly measured with a micrometer or using ultra-sound techniques.
For most applications the torque method is adequate. The bolt is
stretched to a point within it=99s elastic limit where it is
pre-loaded to a value higher than it will be subject to in service.
This ensures that the bolt is not subject to cyclic stretching in
service leading to fatigue failure.
None of the above applies to the typical shear type wing attachment
joint as used on our aircraft types. It is possible however that a
relatively low value torque may be given by the manufacturer but
for a quite different reason. It will be simply to guarantee that
there is no axial play (looseness) allowed that could lead to wear.
A typical shear type wing joint bolt will have a threaded section much
smaller in diameter than the shear loaded area. Since there is no
intent to stretch the the bolt there is no need for a full dia. thread.
Maybe they would specify a torque limit so that someone would not
tighten a 1/2=9D thread to a 1=9D dia. bolt limit????
Steve indicated there is some play but before getting to the reaming
stage it is absolutely necessary to determine how much diametrical play
exists and whether or not that is within the allowable limit. That
information will be in the Technical manuals. I would make every
effort to find it.
At a guess (which is worth nothing!) I would think about 0.002 to 0.003
in. (0.05 to 0.075 mm) would be the maximum allowable. The joint
straps will be manufactured from a 4340 (or similar) alloy steel and
will be heat treated in the area of 170,000 to 200,000 psi. Line
reaming in this case is not for an amateur! In fact it may have to be a
precision grinding operation.
With some luck new standard bolts may bring it back within limit if it
is over.
In any case whenever removing or installing shear type wing bolts you
should use a =98bullet=9D to avoid any wear or damage. If
you don=99t have these get a machine shop to make them for you.
It is simply a steel bullet shaped screw on device to line things up.
Also lots of grease!
Make sure the nut is tight enough so there is no possible looseness.
If you want to measure the torque check the thread size and diameter and
find the applicable limit for that size in standard mild steel.
Cheers;
Walt
From: A. Dennis Savarese <mailto:dsavarese0812@bellsouth.net>
Sent: Tuesday, December 10, 2013 2:57 PM
Subject: Re: Yak-List: YAK55m Wing attachment bolts.
Steve,
This is a common problem with the 55's. You are correct about the fix.
The holes need to be reamed and new, oversized bolts installed. The nut
should be tightened and then torqued to the point where one notch in the
castellated nut aligns with the cotter pin hole in the bolt. The bolts
are stressed in sheer, not in tension. Thus, most likely no torque spec
on the nut.
Dennis
A. Dennis Savarese
334-285-6263
334-546-8182 (mobile)
www.yak-52.com
Skype - Yakguy1
On 12/10/2013 2:41 PM, steve geard wrote:
Hey all Steve from NZ here. YAK55m # 920402.
I've got a quick question about the Wing attachment bolts.
Are they finger tight, or are they supposed to be shimmed and torqued
up?
And has anyone come across any attachment cracking or other defects?
My birds got 360hrs on it and has a bit of play in the main Starboard
attachments, the bolts are not torqued. So my guess is the fix would be
ream the holes and fit oversize bolts???
Cheers Steve :-)
Lifes short fly Aerobatics!!!
href="http://www.aeroelectric.com">www.aeroelectric.com
href="http://www.buildersbooks.com">www.buildersbooks.com
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Message 2
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| Subject: | Switching from a yak52 to a yak55 |
Hi all
There is a moment that I plan to buy more efficient than the Yak 52
aircraft ( I own one for 3 years).
Of course, as yak addict , the choice for a yak 55 looks obvious. (cheaper
than yak 54 or sukkoi)
I am well aware that I will fly only alone, that this plane is a tail
dragger much less tolerant with muddy strips, that I will certainly forget
the idea of flying when there is snow on the runway ....
What do you think? Is this a good choice? Another possibility? What are the
pro or the con?
Thanks
Olivier
Message 3
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| Subject: | Re: Switching from a yak52 to a yak55 |
The ultimate transition from a Yak 52 would be a Yak 50. You will have
incredible performance, efficiency, and envy of all your friends.
Mark. Weeds
On Dec 11, 2013 12:57 PM, "Olivier Vigneron" <ssssskippy@gmail.com> wrote:
> Hi all
>
>
> There is a moment that I plan to buy more efficient than the Yak 52
> aircraft ( I own one for 3 years).
> Of course, as yak addict , the choice for a yak 55 looks obvious. (cheaper
> than yak 54 or sukkoi)
>
> I am well aware that I will fly only alone, that this plane is a tail
> dragger much less tolerant with muddy strips, that I will certainly forget
> the idea of flying when there is snow on the runway ....
>
> What do you think? Is this a good choice? Another possibility? What are
> the pro or the con?
>
> Thanks
>
> Olivier
>
> *
>
> *
>
>
Message 4
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| Subject: | Re: Switching from a yak52 to a yak55 |
You're right Mark...but I would like to improve the aerobatic
capability....Yak 50 would be wonderfull as collection aircraft for
sure...but perhaps less efficient than yak 55 for aerobatics...Am i wrong?
Thanks
Olivier
2013/12/11 theDicePilot . <thedicepilot@gmail.com>
> The ultimate transition from a Yak 52 would be a Yak 50. You will have
> incredible performance, efficiency, and envy of all your friends.
>
> Mark. Weeds
> On Dec 11, 2013 12:57 PM, "Olivier Vigneron" <ssssskippy@gmail.com> wrote:
>
>> Hi all
>>
>>
>>
>> There is a moment that I plan to buy more efficient than the Yak 52
>> aircraft ( I own one for 3 years).
>> Of course, as yak addict , the choice for a yak 55 looks obvious.
>> (cheaper than yak 54 or sukkoi)
>>
>> I am well aware that I will fly only alone, that this plane is a tail
>> dragger much less tolerant with muddy strips, that I will certainly forget
>> the idea of flying when there is snow on the runway ....
>>
>> What do you think? Is this a good choice? Another possibility? What are
>> the pro or the con?
>>
>> Thanks
>>
>> Olivier
>>
>> *
>>
>> _blank">www.aeroelectric.com <http://www.aeroelectric.com>
>> .com" target="_blank">www.buildersbooks.com <http://www.buildersbooks.com>
>> ="_blank">www.homebuilthelp.com <http://www.homebuilthelp.com>
>> ="_blank">www.mypilotstore.com <http://www.mypilotstore.com>
>> ank">www.mrrace.com <http://www.mrrace.com>
>> _blank">http://www.matronics.com/contribution <http://www.matronics.com/contribution>
>> et="_blank">http://www.matronics.com/Navigator?Yak-List <http://www.matronics.com/Navigator?Yak-List>
>> tp://forums.matronics.com <http://forums.matronics.com>
>> *
>>
>> *
>
> *
>
>
Message 5
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| Subject: | Re: Switching from a yak52 to a yak55 |
Bonsoir Olivier ! :D
If you want to do Advanced Aerobatic Competition, go for the Yak-55M.
If you want to experience the pure exhilaration of Flying Aerobatics for Fun, Airshows
or Formation Flying, NOTHING compares to the Yak-50 ! 8)
http://www.yakovlevs.com/display-aviation-events/airshows/
I have flown a lot of different Yaks, Yak-11, Yak-12, Yak-18T, Yak-52, Yak-54,
Yak-55 (have not yet flown the Yak-3 or Yak-9 :-(/ Sukhoi-29 ... some French
and American aerobatic flying machines.
My favourite is most definitely the Yak-50. By a long shot !
Up to you Olivier. Depending on what you are after.
Cheers,
Etienne.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=415412#415412
Message 6
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| Subject: | Re: Switching from a yak52 to a yak55 |
Read this :
http://www.yakovlevs.com/wp-content/uploads/2011/07/FLYER.Yak-50.pdf
http://www.russianaeros.com/yak50product.htm
They are about 25 Yak-50 on the UK CAA Register :
http://www.caa.co.uk/application.aspx?catid=60&pagetype=65&appid=1&mode=summary&aircrafttype=Yak-50
And about 55 Yak-52 ...
http://www.caa.co.uk/application.aspx?catid=60&pagetype=65&appid=1&mode=summary&aircrafttype=Yak-52
http://www.caa.co.uk/applicationmodules/ginfo/ginfo_photo.aspx?regmark=G-CBSS&imgname=G-CBSS001&imgtype=jpg
http://www.caa.co.uk/applicationmodules/ginfo/ginfo_photo.aspx?regmark=G-CBSS&imgname=G-CBSS002&imgtype=jpg
...
--------
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.jpg
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=415413#415413
Message 7
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| Subject: | Re: Switching from a yak52 to a yak55 |
It is true the 18T can do some kinds of aerobatics?
On 12/11/2013 2:27 PM, Etienne Verhellen wrote:
>
> Bonsoir Olivier ! :D
>
> If you want to do Advanced Aerobatic Competition, go for the Yak-55M.
>
> If you want to experience the pure exhilaration of Flying Aerobatics for Fun,
Airshows or Formation Flying, NOTHING compares to the Yak-50 ! 8)
>
> http://www.yakovlevs.com/display-aviation-events/airshows/
>
> I have flown a lot of different Yaks, Yak-11, Yak-12, Yak-18T, Yak-52, Yak-54,
Yak-55 (have not yet flown the Yak-3 or Yak-9 :-(/ Sukhoi-29 ... some French
and American aerobatic flying machines.
>
> My favourite is most definitely the Yak-50. By a long shot !
>
> Up to you Olivier. Depending on what you are after.
>
> Cheers,
>
> Etienne.
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=415412#415412
>
>
Message 8
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| Subject: | Re: Switching from a yak52 to a yak55 |
Ross and Budd Granley perform formation aerobatics in a Yak 55 and Yak
18T. They are an incredible act.
Enjoy.
Mark "Weeds"
RPA FAST Administrator
https://www.youtube.com/watch?v=x05Qg9UICs0&feature=youtube_gdata_player
On Dec 11, 2013 8:26 PM, "William Halverson" <william@netpros.net> wrote:
It is true the 18T can do some kinds of aerobatics?
On 12/11/2013 2:27 PM, Etienne Verhellen wrote:
>
> Bonsoir Olivier ! :D
>
> If you want to do Advanced Aerobatic Competition, go for the Yak-55M.
>
> If you want to experience the pure exhilaration of Flying Aerobatics for
Fun, Airshows or Formation Flying, NOTHING compares to the Yak-50 ! 8)
>
> http://www.yakovlevs.com/display-aviation-events/airshows/
>
> I have flown a lot of different Yaks, Yak-11, Yak-12, Yak-18T, Yak-52,
Yak-54, Yak-55 (have not yet flown the Yak-3 or Yak-9 :-(/ Sukhoi-29 ...
some French and American aerobatic flying machines.
>
> My favourite is most definitely the Yak-50. By a long shot !
>
> Up to you Olivier. Depending on what you are after.
>
> Cheers,
>
> Etienne.
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=415412#415412
>
>
Message 9
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| Subject: | Re: Switching from a yak52 to a yak55 |
The Yak 52 is a much stronger built than the 50. When the 52 was designed,
the YDB had the experience from the 50.
But the 50 indeed is a delight to fly. Personally, I find it easier to fly
than the 52 but I haven't got many hours on a 52.
As for landing: much easier than a Pitts, for instance. As powerfull as she
is, she's also rather docile (unless you go for the serious aerobatic work,
of course).
It becomes increasingly difficult to find certain spare parts (not
everything is interchangeable with the 52), the tailwheel oleo for instance.
And finally: there are not that many Yak 50's for sale.
I would not recommend buying a 50 if you want to advance in aerobatics:
they're oldtimers, and they should be handled as such.
A 55 is better suited for aerobatics and definitely easier to maintain (no
retractable gear).
An issue: figure out how you want to register the plane. Depending upon the
country you live in, you might encounter quite some difficulties.
Only my 2 cents,
Jan
From: Olivier Vigneron <ssssskippy@gmail.com>
Subject: Yak-List: Switching from a yak52 to a yak55
Hi all
There is a moment that I plan to buy more efficient than the Yak 52
aircraft ( I own one for 3 years).
Of course, as yak addict , the choice for a yak 55 looks obvious. (cheaper
than yak 54 or sukkoi)
I am well aware that I will fly only alone, that this plane is a tail
dragger much less tolerant with muddy strips, that I will certainly forget
the idea of flying when there is snow on the runway ....
What do you think? Is this a good choice? Another possibility? What are the
pro or the con?
Thanks
Olivier
<http://www.buildersbooks.com>
Message 10
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| Subject: | Cold Cylinder - housei |
Hi Gang. Mid flight we experienced a vibration in the engine. Upon landing a
mag check revealed vibration on mag 2. In test, cylinder #1 is cold on mag
2. In order: replaced spark plug, tested lead (was good), cleaned mag cap, replaced
mag cap, replaced lead. Still cold cylinder on mag 2; but, runs properly
on mag 1. It is hard to believe that the mag or rotor or points are bad
since only one cylinder is affected. Thoughts?!
Gil Lipaz
Nanchang CJ6/A
310-245-7078
Message 11
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| Subject: | Re:Cold Cylinder |
If you checked the lead for continuity it is more than likely ok. Use a
high tension lead tester and connect one lead to the plug wire and the
other to the ignition conduit. Most likely the wire has an insulation
break and is firing to the conduit rather thatn the plug.
Frank
CJ-6A
Message 12
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| Subject: | Re: Switching from a yak52 to a yak55 |
The 18 T is capable of some quite serious aerobatics! With 400 hp; light weight;
MT prop and inverted oil system (the fuel is already inverted) it can do a full
vertical roll; an outside loop; multiple snap rolls etc
Richard Goode
-----Original Message-----
From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of William Halverson
Sent: 12 December 2013 04:22
Subject: Re: Yak-List: Re: Switching from a yak52 to a yak55
It is true the 18T can do some kinds of aerobatics?
On 12/11/2013 2:27 PM, Etienne Verhellen wrote:
>
> Bonsoir Olivier ! :D
>
> If you want to do Advanced Aerobatic Competition, go for the Yak-55M.
>
> If you want to experience the pure exhilaration of Flying Aerobatics for Fun,
Airshows or Formation Flying, NOTHING compares to the Yak-50 ! 8)
>
> http://www.yakovlevs.com/display-aviation-events/airshows/
>
> I have flown a lot of different Yaks, Yak-11, Yak-12, Yak-18T, Yak-52, Yak-54,
Yak-55 (have not yet flown the Yak-3 or Yak-9 :-(/ Sukhoi-29 ... some French
and American aerobatic flying machines.
>
> My favourite is most definitely the Yak-50. By a long shot !
>
> Up to you Olivier. Depending on what you are after.
>
> Cheers,
>
> Etienne.
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=415412#415412
>
>
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