Today's Message Index:
----------------------
1. 12:24 AM - Jabiru Engine mods (Thruster87)
2. 03:34 AM - Re: Jabiru Engine mods (Gary Ray)
3. 07:23 AM - Re: HDS Speed Problem (lack of) (Steve Freeman)
4. 07:34 AM - Re: HDS Speed Problem (lack of) (Jonathan Starke)
5. 08:08 AM - Re: HDS Speed Problem (lack of) (Jerry)
6. 08:47 AM - Re: HDS Speed Problem (lack of) (Paul Mulwitz)
7. 10:58 AM - Question to any 601XL/650 pilot who have also flown in the Flight Design CTLS (William Dominguez)
8. 11:21 AM - Re: HDS Speed Problem (lack of) (Larry McFarland)
9. 11:34 AM - Re: HDS Speed Problem (lack of) (Larry McFarland)
10. 11:56 AM - Chat Reminder (George Race)
11. 01:27 PM - Re: Webinar (Don Honabach)
12. 01:59 PM - Re: HDS Speed Problem (lack of) (Don Honabach)
13. 02:17 PM - Re: Webinar (Steve Freeman)
14. 02:27 PM - Re: HDS Speed Problem (lack of) (Jerry)
15. 02:56 PM - Re: HDS Speed Problem (lack of) (Don Honabach)
16. 03:06 PM - Re: Question to any 601XL/650 pilot who have also flown in the Flight Design CTLS (ben52425@aol.com)
17. 04:43 PM - Re: HDS Speed Problem (lack of) (Paul Mulwitz)
18. 05:26 PM - Re: HDS Speed Problem (lack of) (Larry McFarland)
19. 06:01 PM - Re: Question to any 601XL/650 pilot who have also flown in the Flight Design CTLS (William Dominguez)
20. 06:24 PM - Re: HDS Speed Problem (lack of) (Jerry)
Message 1
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| Subject: | Jabiru Engine mods |
Most of the problems in Jabs is due to overheating ... sticking rings, worn guides,
exhaust value pitting/breakage, broken through bolts (detonation) etc etc
is all heat related.
The new fine fin heads have 50% more surface area along with a wider setting between
the valves .. there is also a lot more finning material around the exhaust
port which make quite an improvement in terms of getting heat away from the
top end. Additionally the new hollow push rod and rocker gear has greatly improved
lubrication system and will help extend the rocker gear life many times.
One mod I have come across and have implemented into my own engine is to use
K-line valve guide inserts, whilst I haven't done enough hrs on them yet to personally
give them the thumbs up, the South African Jab Distributor has done thousands
of hrs and say they are the bees knees.
The new piston and ring set up provides more clearance in the ring groves which
should help stop ring sticking and the new piston have larger drain slots in
the oil ring grove too ... this combo is a good step forward to reduce ring and
bore wear. Jab have also changed the cylinders in the last few months; these
are now 0.5m longer to lower the compression to overcome detonation and stop
thru bolts breaking.
As I said, most problems in Jab engine relate to getting too hot ... the biggest
factor to fix over heating is fuel mixture. It is imperative that you have the
latest jetting (including needle) in your carby .. Without the right jets you
will most certainly run lean and do damage. Fuel distribution in the 6 cylinder
is a problem and has also claimed the life of many engines ... however there
is a simple fix for the 6 cylinder (not the 4). In the induction track of
the manifold there is an aerofoil which acts as a divider to direct flow inside
the manifold this aerofoil doesnt work. The factory has discovered if you remove
this and simply replace it with a 12mm round tube it improves fuel distribution
and EGT becomes balanced across the cylinders it really does work!
There is another mod to the Bing Carby, although I have not done this myself, ..
the South African Jab Distributor has increased the emulsion air induction size
and drilled the emulsion tube air holes to 4mm I believe this as improved
things in terms of better atomisation. I know Jab in Bundy have verified this
and suggest you talk with them to get the exact details.
I have also tried exhaust wrap for 250 hrs and came to the conclusion that this
didnt provide any real benefit .. it reduced the inside cowl temp but think it
may have put heat stress on the exhaust valve.
Lastly, fly them hard, particularly during run-in to ward off glazing they love
heaps of fuel going through them to cool thngs down.
This is a copy of a post from http://www.recreationalflying.net/index.php
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=316131#316131
Message 2
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| Subject: | Re: Jabiru Engine mods |
Wow, all of these issues not worked out prior to release for only $20K?
I am feeling really happy I chose to fly a William Wynne Corvair engine.
Gary Ray, WW Corvair, 0.060 overbore, Roy's 5th bearing, Falcon Heads, 150
hrs TT
davgray@sbcglobal.net
--------------------------------------------------
From: "Thruster87" <alania@optusnet.com.au>
Sent: Monday, October 18, 2010 3:21 AM
Subject: Zenith-List: Jabiru Engine mods
>
> Most of the problems in Jabs is due to overheating ... sticking rings,
> worn guides, exhaust value pitting/breakage, broken through bolts
> (detonation) etc etc is all heat related.
> The new fine fin heads have 50% more surface area along with a wider
> setting between the valves .. there is also a lot more finning material
> around the exhaust port which make quite an improvement in terms of
> getting heat away from the top end. Additionally the new hollow push rod
> and rocker gear has greatly improved lubrication system and will help
> extend the rocker gear life many times. One mod I have come across and
> have implemented into my own engine is to use K-line valve guide inserts,
> whilst I haven't done enough hrs on them yet to personally give them the
> thumbs up, the South African Jab Distributor has done thousands of hrs and
> say they are the bees knees.
> The new piston and ring set up provides more clearance in the ring groves
> which should help stop ring sticking and the new piston have larger drain
> slots in the oil ring grove too ... this combo is a good step forward to
> reduce ring and bore wear. Jab have also changed the cylinders in the last
> few months; these are now 0.5m longer to lower the compression to overcome
> detonation and stop thru bolts breaking.
> As I said, most problems in Jab engine relate to getting too hot ... the
> biggest factor to fix over heating is fuel mixture. It is imperative that
> you have the latest jetting (including needle) in your carby .. Without
> the right jets you will most certainly run lean and do damage. Fuel
> distribution in the 6 cylinder is a problem and has also claimed the life
> of many engines ... however there is a simple fix for the 6 cylinder (not
> the 4). In the induction track of the manifold there is an aerofoil which
> acts as a divider to direct flow inside the manifold ? this aerofoil
> doesn?Tt work. The factory has discovered if you remove this and simply
> replace it with a 12mm round tube it improves fuel distribution and EGT
> becomes balanced across the cylinders? it really does work!
> There is another mod to the Bing Carby, although I have not done this
> myself, .. the South African Jab Distributor has increased the emulsion
> air induction size and drilled the emulsion tube air holes to 4mm ? I
> believe this as improved things in terms of better atomisation. I know Jab
> in Bundy have verified this and suggest you talk with them to get the
> exact details.
> I have also tried exhaust wrap for 250 hrs and came to the conclusion that
> this didn?Tt provide any real benefit .. it reduced the inside cowl temp
> but think it may have put heat stress on the exhaust valve.
>
> Lastly, fly them hard, particularly during run-in to ward off glazing ?
> they love heaps of fuel going through them to cool thngs down.
>
> This is a copy of a post from http://www.recreationalflying.net/index.php
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=316131#316131
>
>
>
Message 3
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| Subject: | HDS Speed Problem (lack of) |
Hi James,
You should try contacting Don Honabach who monitors this list. He has done
extensive work in this area.
Thank you,
Steve Freeman
-----Original Message-----
From: owner-zenith-list-server@matronics.com
[mailto:owner-zenith-list-server@matronics.com] On Behalf Of Scotsman
Sent: Sunday, October 17, 2010 10:36 PM
Subject: Zenith-List: HDS Speed Problem (lack of)
Quick question to the list and especially for anyone with an HDS operating
on 100 hp.
A friend of mine in South Africa is having difficulties getting anywhere
near the advertised speeds for the HDS on the Zodiac website (135 mph
cruise). Has anyone else had similar difficulties and if not:
- What prop are you running
- What hp is your engine
- What pitch is it set at
- What is your empty weight
- What speed to you achieve at sea level with full throttle - straight and
level
And to anyone else on the list if you have any recommendations for trouble
shooting please send them through. Any help would be appreciated.
James
PS. I will send though a picture of th aircraft shortly but the owner has
recently changed prop to see if that will fix the problem and has the spats
(wheel fairings) on the aircraft.
PPS. He also says that the sink rate is very high when practicing engine
failures...any comments?
--------
Cell +27 83 675 0815
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=316128#316128
Message 4
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| Subject: | Re: HDS Speed Problem (lack of) |
JAMES: Quick question to the list and especially for anyone with an HDS
operating
on 100 hp.
JONATHAN: I am afraid you will never get to 135mph, I have a 601XL, with
100hp (Thinner wing than the HDS) and I have never been able to get to
135mph in the cruise.
Jonathan
Message 5
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| Subject: | HDS Speed Problem (lack of) |
James,
This was a hot topic in the days prior to the XL. Zenith was overly
optimistic on the published speeds of the HDS.
I have an HDS that I just completed my 40 hour test period. I have a
Rotax 912 100 hp with a warp drive prop set for a static rpm of 5400. My
WOT top speed in level flight at 3000 ft 95 degree F was 118 mph
(calibrated). My plane is completely stock. I have no wheel pants or
any other aerodynamic enhancements.
I've been a passenger in Don Honabach's HDS and believe it is much
faster than mine. He has a Jab 3300 with 125 hp, wheel pants, fuselage
to center wing fairing, his wing joints are blended in really nicely. He
has been very meticulous about trying to get every mph he can. When I
was a passenger, I saw 130 kts on the gps. I've never seen anywhere 130
kts on my gps in my plane.
You may want to search the archives, this was a really hot topic pre-xl
era.
Jerry
HDS 912 ULS 42.6 hrs
just happy to be finally flying
On Sun, Oct 17, 2010 at 10:35 PM, Scotsman wrote:
>
> Quick question to the list and especially for anyone with an HDS
> operating on 100 hp.
>
> A friend of mine in South Africa is having difficulties getting
> anywhere near the advertised speeds for the HDS on the Zodiac website
> (135 mph cruise). Has anyone else had similar difficulties and if
> not:
>
> - What prop are you running
> - What hp is your engine
> - What pitch is it set at
> - What is your empty weight
> - What speed to you achieve at sea level with full throttle - straight
> and level
>
> And to anyone else on the list if you have any recommendations for
> trouble shooting please send them through. Any help would be
> appreciated.
>
> James
>
> PS. I will send though a picture of th aircraft shortly but the owner
> has recently changed prop to see if that will fix the problem and has
> the spats (wheel fairings) on the aircraft.
> PPS. He also says that the sink rate is very high when practicing
> engine failures...any comments?
>
> --------
> Cell +27 83 675 0815
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=316128#316128
>
>
Message 6
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| Subject: | HDS Speed Problem (lack of) |
Hi Jerry,
I've been flying a Tecnam Echo Super with Rotax 912-ULS and Sensenich ground adjustable
propeller. I found the best cruise speed setting for the propeller gives
me less than 5500 rpm at full throttle in cruise. This is a lot lower rpm
than your 5400 static.
Perhaps you would get higher cruise speed if you adjust the propeller for more
pitch.
Paul
Camas, WA
-----Original Message-----
From: owner-zenith-list-server@matronics.com [mailto:owner-zenith-list-server@matronics.com] On Behalf Of Jerry
Sent: Monday, October 18, 2010 8:05 AM
Subject: RE: Zenith-List: HDS Speed Problem (lack of)
James,
This was a hot topic in the days prior to the XL. Zenith was overly
optimistic on the published speeds of the HDS.
I have an HDS that I just completed my 40 hour test period. I have a
Rotax 912 100 hp with a warp drive prop set for a static rpm of 5400. My
WOT top speed in level flight at 3000 ft 95 degree F was 118 mph
(calibrated). My plane is completely stock. I have no wheel pants or
any other aerodynamic enhancements.
I've been a passenger in Don Honabach's HDS and believe it is much
faster than mine. He has a Jab 3300 with 125 hp, wheel pants, fuselage
to center wing fairing, his wing joints are blended in really nicely. He
has been very meticulous about trying to get every mph he can. When I
was a passenger, I saw 130 kts on the gps. I've never seen anywhere 130
kts on my gps in my plane.
You may want to search the archives, this was a really hot topic pre-xl
era.
Jerry
HDS 912 ULS 42.6 hrs
just happy to be finally flying
On Sun, Oct 17, 2010 at 10:35 PM, Scotsman wrote:
>
> Quick question to the list and especially for anyone with an HDS
> operating on 100 hp.
>
> A friend of mine in South Africa is having difficulties getting
> anywhere near the advertised speeds for the HDS on the Zodiac website
> (135 mph cruise). Has anyone else had similar difficulties and if
> not:
>
> - What prop are you running
> - What hp is your engine
> - What pitch is it set at
> - What is your empty weight
> - What speed to you achieve at sea level with full throttle - straight
> and level
>
> And to anyone else on the list if you have any recommendations for
> trouble shooting please send them through. Any help would be
> appreciated.
>
> James
>
> PS. I will send though a picture of th aircraft shortly but the owner
> has recently changed prop to see if that will fix the problem and has
> the spats (wheel fairings) on the aircraft.
> PPS. He also says that the sink rate is very high when practicing
> engine failures...any comments?
>
> --------
> Cell +27 83 675 0815
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=316128#316128
>
>
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| Subject: | Question to any 601XL/650 pilot who have also flown in the |
Flight Design CTLS
I'm learning to fly in a Flight Design CTLS and I would like to know,
preferably from someone who have flown in both planes, how it compare to the
Zodiac 601XL in term of performance and flying characteristics.
William Dominguez
Zodiac 601XLB Plans
Miami, Florida
http://sites.google.com/site/billplane/
Message 8
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| Subject: | HDS Speed Problem (lack of) |
Hi James,
I fly a 601HDS tri-gear with a Stratus Subaru EA81 (100 hp) and get 133 mph
max and a comfortable cruise of 115 to 120. The Warp Drive 70-inch 3-blade
Prop is set to 17-1/2 degrees pitch with an 11-inch spinner. It has my own
wheel fairings over 3.5 x 8.0 tires and gearboxes, fairings on the step
struts and
The fuselage to stabilizer gaps are closed. The plane weighs 750 lb.
empty, is capable of a 1300 lb. max takeoff weight. Never lands at more than
1200 lbs.
Normally, I fly at between 1100 to 1250 lbs. at 4200 to 4600 rpm and can
carry to 23 gallons fuel in the header and wing tanks. Also have a belly
mounted radiator
with fairing and louvers. The plane can be seen
http://www.macsmachine.com/images/completion/full/601ezfrontright.gif
Larry McFarland 601HDS at www.macsmachine.com
-----Original Message-----
From: owner-zenith-list-server@matronics.com
[mailto:owner-zenith-list-server@matronics.com] On Behalf Of Scotsman
Sent: Monday, October 18, 2010 12:36 AM
Subject: Zenith-List: HDS Speed Problem (lack of)
Quick question to the list and especially for anyone with an HDS operating
on 100 hp.
A friend of mine in South Africa is having difficulties getting anywhere
near the advertised speeds for the HDS on the Zodiac website (135 mph
cruise). Has anyone else had similar difficulties and if not:
- What prop are you running
- What hp is your engine
- What pitch is it set at
- What is your empty weight
- What speed to you achieve at sea level with full throttle - straight and
level
And to anyone else on the list if you have any recommendations for trouble
shooting please send them through. Any help would be appreciated.
James
PS. I will send though a picture of th aircraft shortly but the owner has
recently changed prop to see if that will fix the problem and has the spats
(wheel fairings) on the aircraft.
PPS. He also says that the sink rate is very high when practicing engine
failures...any comments?
--------
Cell +27 83 675 0815
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=316128#316128
Message 9
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| Subject: | HDS Speed Problem (lack of) |
James,
I forgot to mention forced landings in the HDS. The effect of landing the
HDS without power is best practiced on a nice solitary airstrip.
A real forced landing is akin to landing a well thrown manhole cover. You
need lots of altitude and airspeed to be able to select your touchdown
spot. I practice each time I'm out at least once, gliding from downwind at
85 mph thru the final at 70 to flare at 55 to get within 10-20 feet beyond
the end of the
runway. The HDS is a great little plane, joy to fly. My journal, beginning
section 8 and again at 13 and 14 document recent flying experiences now, if
you're interested.
Larry McFarland 601DS
-----Original Message-----
From: owner-zenith-list-server@matronics.com
[mailto:owner-zenith-list-server@matronics.com] On Behalf Of Scotsman
Sent: Monday, October 18, 2010 12:36 AM
Subject: Zenith-List: HDS Speed Problem (lack of)
Quick question to the list and especially for anyone with an HDS operating
on 100 hp.
A friend of mine in South Africa is having difficulties getting anywhere
near the advertised speeds for the HDS on the Zodiac website (135 mph
cruise). Has anyone else had similar difficulties and if not:
- What prop are you running
- What hp is your engine
- What pitch is it set at
- What is your empty weight
- What speed to you achieve at sea level with full throttle - straight and
level
And to anyone else on the list if you have any recommendations for trouble
shooting please send them through. Any help would be appreciated.
James
PS. I will send though a picture of th aircraft shortly but the owner has
recently changed prop to see if that will fix the problem and has the spats
(wheel fairings) on the aircraft.
PPS. He also says that the sink rate is very high when practicing engine
failures...any comments?
--------
Cell +27 83 675 0815
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=316128#316128
Message 10
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|
Live Chat Room every Monday evening around 8:00 EDT
http://www.mykitairplane.com <blocked::http://www.mykitairplane.com/>
Click on the Chat Room link at the top of the page.
George
Message 11
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Steve,
Try this link:
http://www.eaavideo.org/video.aspx?v=640496506001
FYI - When I tried the link below (http://www.eaavideo.org/video.aspx?v=6
37647030001) it didn't work for me either.
It worked in all my browsers, but make sure you are using IE and have updat
ed your flash (http://www.adobe.com/products/flashplayer/) and disabled any
pop-up blockers.
Lastly, if you are doing this at the hangar, T-Mobile's Mobile Web Stick us
es a proxy for all their Internet traffic and may block streaming or not be
100% compatible with it. As such, try it at home on the Cox Service ...
Don Honabach
Tempe, AZ
601HDS - 150 Hours +
From: owner-zenith-list-server@matronics.com [mailto:owner-zenith-list-serv
er@matronics.com] On Behalf Of Bill Naumuk
Sent: Sunday, October 17, 2010 1:40 PM
Subject: Re: Zenith-List: Webinar
My antivirus had to have its database updated before I could log on. Perhap
s this is your problem. There seem to be lots of new viruses out there.
Bill
----- Original Message -----
From: Steve Freeman<mailto:steve.freeman@syntaxds.com>
Sent: Sunday, October 17, 2010 10:47 AM
Subject: RE: Zenith-List: Webinar
The file will not play for me. Is anyone else having any luck with it?
Thank you,
Steve Freeman
From: owner-zenith-list-server@matronics.com<mailto:owner-zenith-list-serve
r@matronics.com> [mailto:owner-zenith-list-server@matronics.com] On Behalf
Of Carlos Sa
Sent: Sunday, October 17, 2010 7:29 AM
Subject: Re: Zenith-List: Webinar
Damien, I did attend it.
It consisted of an overview of the Zodiac (mostly stuff you can find on the
web).
They also talked about the accidents, the NTSB and the upgrade kit.
Nothing new for those that have been subscribers to this list for the past
12 months.
The webinar is available at the EAA webinar archives: http://www.eaavideo.o
rg/video.aspx?v=637647030001
Carlos
CH601-HD, plans
do not archive
On 17 October 2010 09:34, Damien <dgraham7@twcny.rr.com<mailto:dgraham7@twc
ny.rr.com>> wrote:
Did anyone participate in the EAA Webinar on Thursday about the future of
the Zociac 650 ? I wanted to but I was out of town and did not have interne
t access.
I would like to have played it at a later date, but it does not seem to be
available.
Regards,
Damien
601 HDS
Rotax 912
http://www.matronics.com/Navigator?Zenith-List
http://forums.matronics.com
http://www.matronics.com/contribution
href="http://www.matronics.com/Navigator?Zenith-List">http://www.matronhr
ef="http://forums.matronics.com">http://forums.matronics.com<http://www.m
atronhref=%22http:/forums.matronics.com%22%3ehttp:/forums.matronics.com>
href="http://www.matronics.com/contribution">http://www.matronics.com/c
Message 12
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| Subject: | HDS Speed Problem (lack of) |
James,
One thing to consider is that all ZAC #s are given at sea level. As such, your
ASI/IAS may show lower even though you are performing near published spec speeds.
So for instance, let's say you are flying at 120MPH IAS at 6,000 feet. You need
to convert this to your True Air Speed (i.e. TAS) to see what your IAS would
effectively read at sea level and then compare that to the published ZAC #s.
In this case, here's how the math works:
TAS Correction Factor = ~2% for each 1,000 feet or 12% when flying at 6,000 feet.
TAS = IAS x TAS Correction Factor
TAS = 120MPH * 1.12 = 134.4MPH
This is going off memory, so I apologize if this is 100%.
One of my pet peeves is that ZAC puts out #s at sea level which leads to unrealistic
expectations. In contrast, Vans puts out performance #s at 7,500 feet.
By the way, while I get close to published specs at high power settings, I'm still
a little short even with a 120HP power plant. If someone has the secret recipe
for getting faster speeds on the HDS - I'd love to know as well. With the
extra HP, I can push up the throttle for faster speeds (and definitely really
nice climbs), but the fuel burn rate gets out of control when doing so...
Don Honabach
Tempe, AZ
601HDS - 150 Hours +
-----Original Message-----
From: owner-zenith-list-server@matronics.com [mailto:owner-zenith-list-server@matronics.com] On Behalf Of Steve Freeman
Sent: Monday, October 18, 2010 7:20 AM
Subject: RE: Zenith-List: HDS Speed Problem (lack of)
--> <steve.freeman@syntaxds.com>
Hi James,
You should try contacting Don Honabach who monitors this list. He has done extensive
work in this area.
Thank you,
Steve Freeman
-----Original Message-----
From: owner-zenith-list-server@matronics.com
[mailto:owner-zenith-list-server@matronics.com] On Behalf Of Scotsman
Sent: Sunday, October 17, 2010 10:36 PM
Subject: Zenith-List: HDS Speed Problem (lack of)
Quick question to the list and especially for anyone with an HDS operating on 100
hp.
A friend of mine in South Africa is having difficulties getting anywhere near the
advertised speeds for the HDS on the Zodiac website (135 mph cruise). Has
anyone else had similar difficulties and if not:
- What prop are you running
- What hp is your engine
- What pitch is it set at
- What is your empty weight
- What speed to you achieve at sea level with full throttle - straight and level
And to anyone else on the list if you have any recommendations for trouble shooting
please send them through. Any help would be appreciated.
James
PS. I will send though a picture of th aircraft shortly but the owner has recently
changed prop to see if that will fix the problem and has the spats (wheel
fairings) on the aircraft.
PPS. He also says that the sink rate is very high when practicing engine failures...any
comments?
--------
Cell +27 83 675 0815
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=316128#316128
Message 13
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|
Thanks - this links work. The others did not. I was trying only from. The
Hangar link is not good for streaming anything. Tooooooo slooooow!
Thank you,
Steve Freeman
From: owner-zenith-list-server@matronics.com
[mailto:owner-zenith-list-server@matronics.com] On Behalf Of Don Honabach
Sent: Monday, October 18, 2010 1:23 PM
Subject: RE: Zenith-List: Webinar
Steve,
Try this link:
http://www.eaavideo.org/video.aspx?v=640496506001
FYI - When I tried the link below
(http://www.eaavideo.org/video.aspx?v=637647030001) it didn't work for me
either.
It worked in all my browsers, but make sure you are using IE and have
updated your flash (http://www.adobe.com/products/flashplayer/) and disabled
any pop-up blockers.
Lastly, if you are doing this at the hangar, T-Mobile's Mobile Web Stick
uses a proxy for all their Internet traffic and may block streaming or not
be 100% compatible with it. As such, try it at home on the Cox Service .
Don Honabach
Tempe, AZ
601HDS - 150 Hours +
From: owner-zenith-list-server@matronics.com
[mailto:owner-zenith-list-server@matronics.com] On Behalf Of Bill Naumuk
Sent: Sunday, October 17, 2010 1:40 PM
Subject: Re: Zenith-List: Webinar
My antivirus had to have its database updated before I could log on. Perhaps
this is your problem. There seem to be lots of new viruses out there.
Bill
----- Original Message -----
From: Steve Freeman <mailto:steve.freeman@syntaxds.com>
Sent: Sunday, October 17, 2010 10:47 AM
Subject: RE: Zenith-List: Webinar
The file will not play for me. Is anyone else having any luck with it?
Thank you,
Steve Freeman
From: owner-zenith-list-server@matronics.com
[mailto:owner-zenith-list-server@matronics.com] On Behalf Of Carlos Sa
Sent: Sunday, October 17, 2010 7:29 AM
Subject: Re: Zenith-List: Webinar
Damien, I did attend it.
It consisted of an overview of the Zodiac (mostly stuff you can find on the
web).
They also talked about the accidents, the NTSB and the upgrade kit.
Nothing new for those that have been subscribers to this list for the past
12 months.
The webinar is available at the EAA webinar archives:
http://www.eaavideo.org/video.aspx?v=637647030001
Carlos
CH601-HD, plans
do not archive
On 17 October 2010 09:34, Damien <dgraham7@twcny.rr.com> wrote:
Did anyone participate in the EAA Webinar on Thursday about the future of
the Zociac 650 ? I wanted to but I was out of town and did not have internet
access.
I would like to have played it at a later date, but it does not seem to be
available.
Regards,
Damien
601 HDS
Rotax 912
http://www.matronics.com/Navigator?Zenith-List
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Message 14
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| Subject: | HDS Speed Problem (lack of) |
One of the settings that I during phase I was a static rpm of 5200.
This did not give me a significant increase in speed. My max inflight
rpm with this setting was just less than 5400. It did seem to increase
my oil temps. My present setting seems to work for me. Will probably
try different settings in the future. After all it is an experimental.
Jerry
On Mon, Oct 18, 2010 at 8:44 AM, Paul Mulwitz wrote:
>
> Hi Jerry,
>
> I've been flying a Tecnam Echo Super with Rotax 912-ULS and Sensenich
> ground adjustable propeller. I found the best cruise speed setting
> for the propeller gives me less than 5500 rpm at full throttle in
> cruise. This is a lot lower rpm than your 5400 static.
> Perhaps you would get higher cruise speed if you adjust the propeller
> for more pitch.
>
> Paul
> Camas, WA
>
>
> -----Original Message-----
> From: owner-zenith-list-server@matronics.com
> [mailto:owner-zenith-list-server@matronics.com] On Behalf Of Jerry
> Sent: Monday, October 18, 2010 8:05 AM
> To: zenith-list@matronics.com
> Subject: RE: Zenith-List: HDS Speed Problem (lack of)
>
>
> James,
>
> This was a hot topic in the days prior to the XL. Zenith was overly
> optimistic on the published speeds of the HDS.
>
> I have an HDS that I just completed my 40 hour test period. I have a
> Rotax 912 100 hp with a warp drive prop set for a static rpm of 5400.
> My WOT top speed in level flight at 3000 ft 95 degree F was 118 mph
> (calibrated). My plane is completely stock. I have no wheel pants or
> any other aerodynamic enhancements.
>
> I've been a passenger in Don Honabach's HDS and believe it is much
> faster than mine. He has a Jab 3300 with 125 hp, wheel pants,
> fuselage to center wing fairing, his wing joints are blended in really
> nicely. He has been very meticulous about trying to get every mph he
> can. When I was a passenger, I saw 130 kts on the gps. I've never
> seen anywhere 130 kts on my gps in my plane.
>
> You may want to search the archives, this was a really hot topic
> pre-xl era.
>
> Jerry
> HDS 912 ULS 42.6 hrs
> just happy to be finally flying
>
>
> On Sun, Oct 17, 2010 at 10:35 PM, Scotsman wrote:
>
>>
>> Quick question to the list and especially for anyone with an HDS
>> operating on 100 hp.
>>
>> A friend of mine in South Africa is having difficulties getting
>> anywhere near the advertised speeds for the HDS on the Zodiac website
>> (135 mph cruise). Has anyone else had similar difficulties and if
>> not:
>>
>> - What prop are you running
>> - What hp is your engine
>> - What pitch is it set at
>> - What is your empty weight
>> - What speed to you achieve at sea level with full throttle -
>> straight and level
>>
>> And to anyone else on the list if you have any recommendations for
>> trouble shooting please send them through. Any help would be
>> appreciated.
>>
>> James
>>
>> PS. I will send though a picture of th aircraft shortly but the owner
>> has recently changed prop to see if that will fix the problem and has
>> the spats (wheel fairings) on the aircraft.
>> PPS. He also says that the sink rate is very high when practicing
>> engine failures...any comments?
>>
>> --------
>> Cell +27 83 675 0815
>>
>>
>>
>>
>> Read this topic online here:
>>
>> http://forums.matronics.com/viewtopic.php?p=316128#316128
>>
>>
>>
>>
>>
>>
>>
>
>
Message 15
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| Subject: | HDS Speed Problem (lack of) |
>> PPS. He also says that the sink rate is very high when practicing engine failures...any
comments?
I believe this is fairly common on the HDS and I've read others indicate that glide
rate during power off is high on this model. I'd be curious if those flying
with HD wings have the same sink rates.
Thanks,
Don
-----Original Message-----
From: owner-zenith-list-server@matronics.com [mailto:owner-zenith-list-server@matronics.com] On Behalf Of Scotsman
Sent: Sunday, October 17, 2010 10:36 PM
Subject: Zenith-List: HDS Speed Problem (lack of)
Quick question to the list and especially for anyone with an HDS operating on 100
hp.
A friend of mine in South Africa is having difficulties getting anywhere near the
advertised speeds for the HDS on the Zodiac website (135 mph cruise). Has
anyone else had similar difficulties and if not:
- What prop are you running
- What hp is your engine
- What pitch is it set at
- What is your empty weight
- What speed to you achieve at sea level with full throttle - straight and level
And to anyone else on the list if you have any recommendations for trouble shooting
please send them through. Any help would be appreciated.
James
PS. I will send though a picture of th aircraft shortly but the owner has recently
changed prop to see if that will fix the problem and has the spats (wheel
fairings) on the aircraft.
PPS. He also says that the sink rate is very high when practicing engine failures...any
comments?
--------
Cell +27 83 675 0815
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=316128#316128
Message 16
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| Subject: | Re: Question to any 601XL/650 pilot who have also flown in |
the Flight Design CTLS
HI
FROM MY FLYING. THE CT IS HARDER TO LAND
GOOD LUCK GIVE ME THE 601
BEN
-----Original Message-----
From: William Dominguez <bill_dom@yahoo.com>
Sent: Mon, Oct 18, 2010 1:55 pm
Subject: Zenith-List: Question to any 601XL/650 pilot who have also flown
in the Flight Design CTLS
I'm learning to fly in a Flight Design CTLS and I would like to know, pref
erably from someone who have flown in both planes, how it compare to the
Zodiac 601XL in term of performance and flying characteristics.
William Dominguez
Zodiac 601XLB Plans
Miami, Florida
http://sites.google.com/site/billplane/
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Message 17
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| Subject: | HDS Speed Problem (lack of) |
Hi Jerry,
The way I found the "Best" setting for my plane was to make little changes and
do a speed run (at 3000 feet?). I plotted the indicated airspeed and RPM (over
a range of RPMs) on a piece of graph paper. This showed me the trend rather
than the exact measurements (any measurement is subject to "Noise" but averaging
them together tends to remove the measurement errors).
I chose the final setting based on operating issues rather than speed, but I got
close to the best speed in cruise anyway. I decided I wanted to be able to
run the engine at full throttle in level flight without going over the red line.
Good luck,
Paul
-----Original Message-----
From: owner-zenith-list-server@matronics.com [mailto:owner-zenith-list-server@matronics.com] On Behalf Of Jerry
Sent: Monday, October 18, 2010 2:25 PM
Subject: RE: Zenith-List: HDS Speed Problem (lack of)
One of the settings that I during phase I was a static rpm of 5200.
This did not give me a significant increase in speed. My max inflight
rpm with this setting was just less than 5400. It did seem to increase
my oil temps. My present setting seems to work for me. Will probably
try different settings in the future. After all it is an experimental.
Jerry
On Mon, Oct 18, 2010 at 8:44 AM, Paul Mulwitz wrote:
>
> Hi Jerry,
>
> I've been flying a Tecnam Echo Super with Rotax 912-ULS and Sensenich
> ground adjustable propeller. I found the best cruise speed setting
> for the propeller gives me less than 5500 rpm at full throttle in
> cruise. This is a lot lower rpm than your 5400 static.
> Perhaps you would get higher cruise speed if you adjust the propeller
> for more pitch.
>
> Paul
> Camas, WA
>
>
> -----Original Message-----
> From: owner-zenith-list-server@matronics.com
> [mailto:owner-zenith-list-server@matronics.com] On Behalf Of Jerry
> Sent: Monday, October 18, 2010 8:05 AM
> To: zenith-list@matronics.com
> Subject: RE: Zenith-List: HDS Speed Problem (lack of)
>
>
> James,
>
> This was a hot topic in the days prior to the XL. Zenith was overly
> optimistic on the published speeds of the HDS.
>
> I have an HDS that I just completed my 40 hour test period. I have a
> Rotax 912 100 hp with a warp drive prop set for a static rpm of 5400.
> My WOT top speed in level flight at 3000 ft 95 degree F was 118 mph
> (calibrated). My plane is completely stock. I have no wheel pants or
> any other aerodynamic enhancements.
>
> I've been a passenger in Don Honabach's HDS and believe it is much
> faster than mine. He has a Jab 3300 with 125 hp, wheel pants,
> fuselage to center wing fairing, his wing joints are blended in really
> nicely. He has been very meticulous about trying to get every mph he
> can. When I was a passenger, I saw 130 kts on the gps. I've never
> seen anywhere 130 kts on my gps in my plane.
>
> You may want to search the archives, this was a really hot topic
> pre-xl era.
>
> Jerry
> HDS 912 ULS 42.6 hrs
> just happy to be finally flying
>
>
> On Sun, Oct 17, 2010 at 10:35 PM, Scotsman wrote:
>
>>
>> Quick question to the list and especially for anyone with an HDS
>> operating on 100 hp.
>>
>> A friend of mine in South Africa is having difficulties getting
>> anywhere near the advertised speeds for the HDS on the Zodiac website
>> (135 mph cruise). Has anyone else had similar difficulties and if
>> not:
>>
>> - What prop are you running
>> - What hp is your engine
>> - What pitch is it set at
>> - What is your empty weight
>> - What speed to you achieve at sea level with full throttle -
>> straight and level
>>
>> And to anyone else on the list if you have any recommendations for
>> trouble shooting please send them through. Any help would be
>> appreciated.
>>
>> James
>>
>> PS. I will send though a picture of th aircraft shortly but the owner
>> has recently changed prop to see if that will fix the problem and has
>> the spats (wheel fairings) on the aircraft.
>> PPS. He also says that the sink rate is very high when practicing
>> engine failures...any comments?
>>
>> --------
>> Cell +27 83 675 0815
>>
>>
>>
>>
>> Read this topic online here:
>>
>> http://forums.matronics.com/viewtopic.php?p=316128#316128
>>
>>
>>
>>
>>
>>
>>
>
>
Message 18
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| Subject: | HDS Speed Problem (lack of) |
Hi Don,
I've flown an HDS just like mine with full HD wings and the climb and glide
are far better, although the cruise speeds are also a bit slower, by 15 - 20
mph.
Larry McFarland
-----Original Message-----
From: owner-zenith-list-server@matronics.com
[mailto:owner-zenith-list-server@matronics.com] On Behalf Of Don Honabach
Sent: Monday, October 18, 2010 4:53 PM
Subject: RE: Zenith-List: HDS Speed Problem (lack of)
--> <don.honabach@pcperfect.com>
>> PPS. He also says that the sink rate is very high when practicing engine
failures...any comments?
I believe this is fairly common on the HDS and I've read others indicate
that glide rate during power off is high on this model. I'd be curious if
those flying with HD wings have the same sink rates.
Thanks,
Don
-----Original Message-----
From: owner-zenith-list-server@matronics.com
[mailto:owner-zenith-list-server@matronics.com] On Behalf Of Scotsman
Sent: Sunday, October 17, 2010 10:36 PM
Subject: Zenith-List: HDS Speed Problem (lack of)
Quick question to the list and especially for anyone with an HDS operating
on 100 hp.
A friend of mine in South Africa is having difficulties getting anywhere
near the advertised speeds for the HDS on the Zodiac website (135 mph
cruise). Has anyone else had similar difficulties and if not:
- What prop are you running
- What hp is your engine
- What pitch is it set at
- What is your empty weight
- What speed to you achieve at sea level with full throttle - straight and
level
And to anyone else on the list if you have any recommendations for trouble
shooting please send them through. Any help would be appreciated.
James
PS. I will send though a picture of th aircraft shortly but the owner has
recently changed prop to see if that will fix the problem and has the spats
(wheel fairings) on the aircraft.
PPS. He also says that the sink rate is very high when practicing engine
failures...any comments?
--------
Cell +27 83 675 0815
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=316128#316128
Message 19
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|
| Subject: | Re: Question to any 601XL/650 pilot who have also flown in |
the Flight Design CTLS
Are you referring to the CTSW or the CTLS? I was told that the CTSW had a
tendency to bounce during landing and that the CTLS improved on that by having
an better landing gear. Both have a narrower landing gear than the Zodiac.
William Dominguez
Zodiac 601XLB Plans
Miami, Florida
http://sites.google.com/site/billplane/
________________________________
From: "ben52425@aol.com" <ben52425@aol.com>
Sent: Mon, October 18, 2010 6:03:52 PM
Subject: Re: Zenith-List: Question to any 601XL/650 pilot who have also flown in
the Flight Design CTLS
HI
FROM MY FLYING. THE CT IS HARDER TO LAND
GOOD LUCK GIVE ME THE 601
BEN
-----Original Message-----
From: William Dominguez <bill_dom@yahoo.com>
Sent: Mon, Oct 18, 2010 1:55 pm
Subject: Zenith-List: Question to any 601XL/650 pilot who have also flown in the
Flight Design CTLS
I'm learning to fly in a Flight Design CTLS and I would like to know, preferably
from someone who have flown in both planes, how it compare to the Zodiac 601XL
in term of performance and flying characteristics.
William Dominguez
Zodiac 601XLB Plans
Miami, Florida
http://sites.google.com/site/billplane/
====================================
//www.matronics.com/Navigator?Zenith-List">http://www.matronics.com/Navigator?Zenith-List===================================
//forums.matronics.com">http://forums.matronics.com
====================================
//www.matronics.com/contribution">http://www.matronics.com/contribution===================================
Message 20
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| Subject: | HDS Speed Problem (lack of) |
Paul
I did something similar, but my goal wasn't to maximize the speed. I
plan on operating my plane at Flagstaff Arizona (part time), which has
an altitude of 7K ft and in the summer time the density altitude can go
over 10K ft. So I had to compromise some speed for rate of climb.
Right now I'm happy with where I have the prop set. That could change
in the future.
Jerry
On Mon, Oct 18, 2010 at 4:40 PM, Paul Mulwitz wrote:
>
> Hi Jerry,
>
> The way I found the "Best" setting for my plane was to make little
> changes and do a speed run (at 3000 feet?). I plotted the indicated
> airspeed and RPM (over a range of RPMs) on a piece of graph paper.
> This showed me the trend rather than the exact measurements (any
> measurement is subject to "Noise" but averaging them together tends to
> remove the measurement errors).
>
> I chose the final setting based on operating issues rather than speed,
> but I got close to the best speed in cruise anyway. I decided I
> wanted to be able to run the engine at full throttle in level flight
> without going over the red line.
>
> Good luck,
>
> Paul
>
> -----Original Message-----
> From: owner-zenith-list-server@matronics.com
> [mailto:owner-zenith-list-server@matronics.com] On Behalf Of Jerry
> Sent: Monday, October 18, 2010 2:25 PM
> To: zenith-list@matronics.com
> Subject: RE: Zenith-List: HDS Speed Problem (lack of)
>
>
> One of the settings that I during phase I was a static rpm of 5200.
> This did not give me a significant increase in speed. My max inflight
> rpm with this setting was just less than 5400. It did seem to increase
> my oil temps. My present setting seems to work for me. Will probably
> try different settings in the future. After all it is an
> experimental.
>
> Jerry
>
>
> On Mon, Oct 18, 2010 at 8:44 AM, Paul Mulwitz wrote:
>
>>
>> Hi Jerry,
>>
>> I've been flying a Tecnam Echo Super with Rotax 912-ULS and Sensenich
>> ground adjustable propeller. I found the best cruise speed setting
>> for the propeller gives me less than 5500 rpm at full throttle in
>> cruise. This is a lot lower rpm than your 5400 static.
>> Perhaps you would get higher cruise speed if you adjust the propeller
>> for more pitch.
>>
>> Paul
>> Camas, WA
>>
>>
>> -----Original Message-----
>> From: owner-zenith-list-server@matronics.com
>> [mailto:owner-zenith-list-server@matronics.com] On Behalf Of Jerry
>> Sent: Monday, October 18, 2010 8:05 AM
>> To: zenith-list@matronics.com
>> Subject: RE: Zenith-List: HDS Speed Problem (lack of)
>>
>>
>> James,
>>
>> This was a hot topic in the days prior to the XL. Zenith was overly
>> optimistic on the published speeds of the HDS.
>>
>> I have an HDS that I just completed my 40 hour test period. I have a
>> Rotax 912 100 hp with a warp drive prop set for a static rpm of 5400.
>> My WOT top speed in level flight at 3000 ft 95 degree F was 118 mph
>> (calibrated). My plane is completely stock. I have no wheel pants
>> or any other aerodynamic enhancements.
>>
>> I've been a passenger in Don Honabach's HDS and believe it is much
>> faster than mine. He has a Jab 3300 with 125 hp, wheel pants,
>> fuselage to center wing fairing, his wing joints are blended in
>> really nicely. He has been very meticulous about trying to get every
>> mph he can. When I was a passenger, I saw 130 kts on the gps. I've
>> never seen anywhere 130 kts on my gps in my plane.
>>
>> You may want to search the archives, this was a really hot topic
>> pre-xl era.
>>
>> Jerry
>> HDS 912 ULS 42.6 hrs
>> just happy to be finally flying
>>
>>
>> On Sun, Oct 17, 2010 at 10:35 PM, Scotsman wrote:
>>
>>>
>>> Quick question to the list and especially for anyone with an HDS
>>> operating on 100 hp.
>>>
>>> A friend of mine in South Africa is having difficulties getting
>>> anywhere near the advertised speeds for the HDS on the Zodiac
>>> website (135 mph cruise). Has anyone else had similar difficulties
>>> and if not:
>>>
>>> - What prop are you running
>>> - What hp is your engine
>>> - What pitch is it set at
>>> - What is your empty weight
>>> - What speed to you achieve at sea level with full throttle -
>>> straight and level
>>>
>>> And to anyone else on the list if you have any recommendations for
>>> trouble shooting please send them through. Any help would be
>>> appreciated.
>>>
>>> James
>>>
>>> PS. I will send though a picture of th aircraft shortly but the
>>> owner has recently changed prop to see if that will fix the problem
>>> and has the spats (wheel fairings) on the aircraft.
>>> PPS. He also says that the sink rate is very high when practicing
>>> engine failures...any comments?
>>>
>>> --------
>>> Cell +27 83 675 0815
>>>
>>>
>>>
>>>
>>> Read this topic online here:
>>>
>>> http://forums.matronics.com/viewtopic.php?p=316128#316128
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>
>>
>>
>>
>>
>>
>
>
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