PFH Sonex B

Discussion for builders, pilots, owners, and those interested in building or owning a second generation Sonex or Waiex.

Re: PFH Sonex B

Postby pfhoeycfi » Sun Jan 22, 2023 1:22 pm

With my flaps set back to spec and a 6.5" length of 1/4 Dia drinking straw taped under the right aileron, left roll tendency is gone and I can fly handsoff. 6.5" was my first try. I make a small tab based on that.
Peter Hoey
SEL Pvt, Comm Glider, CFIG, Pawnee & L19 Towpilot
Philadelphia Glider Council
Sonex B SNB0021, N561PH, Taildragger, Aerovee Turbo, MGL MX1, First flight Dec 18, 2022
Also built Sonerai IIL N86PH
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Re: PFH Sonex B

Postby Bryan Cotton » Sun Jan 22, 2023 1:39 pm

pfhoeycfi wrote:With my flaps set back to spec and a 6.5" length of 1/4 Dia drinking straw taped under the right aileron, left roll tendency is gone and I can fly handsoff. 6.5" was my first try. I make a small tab based on that.

Flying solo of course. Do you have a center stick? I found that when in trim for two up, it would roll left from the left side and right from the right side. Not by much.

Bryan Cotton
Poplar Grove, IL C77
Waiex 191 N191YX
Taildragger, Aerovee, acro ailerons
dual sticks with sport trainer controls
Prebuilt spars and machined angle kit
Year 2 flying and approaching 200 hours December 23
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Re: PFH Sonex B

Postby pfhoeycfi » Sun Jan 22, 2023 1:52 pm

Bryan Cotton wrote:
pfhoeycfi wrote:With my flaps set back to spec and a 6.5" length of 1/4 Dia drinking straw taped under the right aileron, left roll tendency is gone and I can fly handsoff. 6.5" was my first try. I make a small tab based on that.

Flying solo of course. Do you have a center stick? I found that when in trim for two up, it would roll left from the left side and right from the right side. Not by much.



Yes center stick. I should have also said I was flying from the middle...which is more comfortable for me. I suspect when I try from the left again it will roll a bit in that direction.
Peter Hoey
SEL Pvt, Comm Glider, CFIG, Pawnee & L19 Towpilot
Philadelphia Glider Council
Sonex B SNB0021, N561PH, Taildragger, Aerovee Turbo, MGL MX1, First flight Dec 18, 2022
Also built Sonerai IIL N86PH
pfhoeycfi
 
Posts: 383
Joined: Wed Jun 28, 2017 3:45 pm

Re: PFH Sonex B

Postby pfhoeycfi » Sun Jan 29, 2023 1:53 pm

Flight number 5 today. I've noticed over the past 2 flights that the number 4 CHT is significantly cooler than the others. Typically #4 is 20 deg to 30 deg cooler than the max. 1, 2 and 3 are always within 5 or 6 degrees of each other, 3 always the hottest. RPM and MP are good. For example...in order... 356, 355, 358, 322. The #4 EGT is not the coolest. At what point is the difference a concern, if at all.
Peter
Peter Hoey
SEL Pvt, Comm Glider, CFIG, Pawnee & L19 Towpilot
Philadelphia Glider Council
Sonex B SNB0021, N561PH, Taildragger, Aerovee Turbo, MGL MX1, First flight Dec 18, 2022
Also built Sonerai IIL N86PH
pfhoeycfi
 
Posts: 383
Joined: Wed Jun 28, 2017 3:45 pm

Re: PFH Sonex B

Postby pappas » Sun Jan 29, 2023 8:42 pm

If your temps always stay where you see them now, you should be a very happy boy! EGT isn't actually very important. CHT's rule!
Lou Pappas
Phoenix, AZ
RV-7A Flying (2024)
Waiex B Turbo (2016)
RV-8 (2009)
Waiex Legacy 3300 (2007)
Hiperlight SNS-9 (1991)
Falcon Ultralight (1989)
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Re: PFH Sonex B

Postby BRS » Mon Jan 30, 2023 12:30 pm

pappas wrote:If your temps always stay where you see them now, you should be a very happy boy! EGT isn't actually very important. CHT's rule!


Revmaster places an EGT limit of 1400˚F. Does Aerovee have such a limit? Seems to be a matter of what the exhaust valves are made of. Lycoming does not have a limit on EGT as certified engines have more robust valve designs. So in my case, at least, I'd say that EGT IS important as far as maximum limits.
-Brock
Sonex-A (s/n 1013)
R2300, P-tip 54/50
Center Stick
V16, TT22
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Re: PFH Sonex B

Postby builderflyer » Tue Jan 31, 2023 10:47 am

BRS wrote:
pappas wrote:If your temps always stay where you see them now, you should be a very happy boy! EGT isn't actually very important. CHT's rule!


Revmaster places an EGT limit of 1400˚F. Does Aerovee have such a limit? Seems to be a matter of what the exhaust valves are made of. Lycoming does not have a limit on EGT as certified engines have more robust valve designs. So in my case, at least, I'd say that EGT IS important as far as maximum limits.



Jabiru also places EGT limits on their engines........1256 degrees when over 70 % power, for example on my 3300. It may be best to ignore Busch's advice unless flying behind a Continental or Lycoming engine.

Art,,,,,,,,,,,,,,Sonex taildragger #95,,,,,,,,,,,,,,Jabiru 3300 #261
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Re: PFH Sonex B

Postby pfhoeycfi » Wed Feb 08, 2023 10:07 am

Peter Hoey
SEL Pvt, Comm Glider, CFIG, Pawnee & L19 Towpilot
Philadelphia Glider Council
Sonex B SNB0021, N561PH, Taildragger, Aerovee Turbo, MGL MX1, First flight Dec 18, 2022
Also built Sonerai IIL N86PH
pfhoeycfi
 
Posts: 383
Joined: Wed Jun 28, 2017 3:45 pm

Re: PFH Sonex B

Postby Bryan Cotton » Wed Feb 08, 2023 10:17 am

Nice! I should do a writeup for Sport Aviation.
Bryan Cotton
Poplar Grove, IL C77
Waiex 191 N191YX
Taildragger, Aerovee, acro ailerons
dual sticks with sport trainer controls
Prebuilt spars and machined angle kit
Year 2 flying and approaching 200 hours December 23
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Posts: 5469
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Location: C77

Re: PFH Sonex B

Postby pfhoeycfi » Wed Feb 08, 2023 10:53 am

Bryan Cotton wrote:Nice! I should do a writeup for Sport Aviation.


You should... EAA has a "What our members are building" form on their website. You can choose a long or short format... I went short. EAA said they would let me know when they will include it. Kitplanes was even easier. I just sent a short paragraph and a few pics to editorial@kitplanes dot com and they had it posted in a few hours.

Flight # 7 this morning,

Peter
Peter Hoey
SEL Pvt, Comm Glider, CFIG, Pawnee & L19 Towpilot
Philadelphia Glider Council
Sonex B SNB0021, N561PH, Taildragger, Aerovee Turbo, MGL MX1, First flight Dec 18, 2022
Also built Sonerai IIL N86PH
pfhoeycfi
 
Posts: 383
Joined: Wed Jun 28, 2017 3:45 pm

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