Spacing for throttle, mixture, trim

Panel designs, construction methods, and pictures

Spacing for throttle, mixture, trim

Postby Bryan Cotton » Wed Feb 01, 2017 8:22 pm

The way I have my panel laid out, there is a 2.5" spacing. The C182 in my hangar has 3" spacing between the throttle and mixture. Is 2.5" enough?
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: Spacing for throttle, mixture, trim

Postby fastj22 » Wed Feb 01, 2017 8:44 pm

mock it up with some cardboard or scrap plywood and a glue gun.
Sit in he cockpit and make some airplane noises. Adjust as needed.

John Gillis
SEL Private, Comm Glider, Tow pilot (Pawnee Driver)
Waiex N116YX, Jabiru 3300, Tail dragger,
First flight, 3/16/2013. 403 hours and climbing.
Home: CO15. KOSH x 5
Flying a B-Model Conversion (Super Bee Baby!)
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Re: Spacing for throttle, mixture, trim

Postby SNX1508 » Thu Feb 02, 2017 8:11 am

Bryan Cotton wrote:The way I have my panel laid out, there is a 2.5" spacing. The C182 in my hangar has 3" spacing between the throttle and mixture. Is 2.5" enough?


Hi Bryan,
We met last summer at the Poplar Grove fly in. I have a similar instrument panel set up as yours, with mixture, throttle & trim controls, along with fuses and switches, mounted on a lower sub panel. I placed the mixture, throttle & trim controls as close together as physically possible due to limited panel space. Although I have not yet flown the aircraft, I have ran the engine several times and did not have any issues with the mixture / throttle placement. Perhaps I will change my mind after actual flight.

See PIC's here:

http://www.mykitlog.com/users/display_l ... 0609&row=7

FAA inspection & airworthiness certificate issued on 11/4/2016 !!

Terry L Cooper
SNX1508
AeroVee
Tail Dragger
57C
East Troy, WI
Terry
Sonex #1508
N296SX
AeroVee #0736
Tail Dragger
http://www.mykitlog.com/SNX1508
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Re: Spacing for throttle, mixture, trim

Postby Bryan Cotton » Thu Feb 02, 2017 9:49 am

Hey Terry, good to hear from you again. Boy you are close! The panel looks good. I am planning a Cessna style throttle rather than a quadrant, otherwise our panels are similar. I am working out concepts for reversing the direction of travel. I see you also have the center controls. Looks great!
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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Bryan Cotton
 
Posts: 4957
Joined: Mon Jul 01, 2013 9:54 pm
Location: C77

Re: Spacing for throttle, mixture, trim

Postby Bryan Cotton » Thu Feb 02, 2017 11:27 pm

We mocked up the controls.

Image

We downsized the control knob size but our fingers got pinched between the trim and the mixture. I think we are going to mount the intercom on the angled panel, the transponder as far right as it will go, and move the trim to the right.

The fake throttle is mounted to a 1/4" steel rod and the mixture to a wood dowel. There is a 2x4 behind the fake panel section. It has 1/4" through holes for the fake controls.

What size knobs are you guys using? FAA size or smaller?
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
User avatar
Bryan Cotton
 
Posts: 4957
Joined: Mon Jul 01, 2013 9:54 pm
Location: C77

Re: Spacing for throttle, mixture, trim

Postby ScottM-Sonex1629 » Fri Feb 03, 2017 10:16 am

Bryan,

Like the idea of standard Cessna style throttle control, however I'm sure you are aware the Aeroinjector uses a reverse movement control. So if you push with a vernier style throttle, it will close the aeroinjector slide plate- unless you fashion some sort of 180 degree reversing linkage.

Hope that makes sense, and you've thought that out?
Scott Meyer
Sonex 1629 - Sold...9/2019
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Re: Spacing for throttle, mixture, trim

Postby fastj22 » Fri Feb 03, 2017 10:46 am

Make sure your cables clear the bottom of the tank. I mounted my mixture dead center and it was a challenge to snake it around the cutoff valve.

John Gillis
SEL Private, Comm Glider, Tow pilot (Pawnee Driver)
Waiex N116YX, Jabiru 3300, Tail dragger,
First flight, 3/16/2013. 403 hours and climbing.
Home: CO15. KOSH x 5
Flying a B-Model Conversion (Super Bee Baby!)
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fastj22
 
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Re: Spacing for throttle, mixture, trim

Postby Bryan Cotton » Fri Feb 03, 2017 1:15 pm

Scott,
I have a couple ideas for a reversing linkage right behind the panel.

John,
Thanks for the heads up. I should chuck the tank in there.
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
User avatar
Bryan Cotton
 
Posts: 4957
Joined: Mon Jul 01, 2013 9:54 pm
Location: C77

Re: Spacing for throttle, mixture, trim

Postby fastj22 » Fri Feb 03, 2017 5:26 pm

Another thing Bryan, I've flown with the DialATrim and you may want to make sure you can turn the knob without your knuckles hitting anything. You will be giving it a few full turns while adjusting trim and its not just finger tight. It takes a bit of torque.

John Gillis
SEL Private, Comm Glider, Tow pilot (Pawnee Driver)
Waiex N116YX, Jabiru 3300, Tail dragger,
First flight, 3/16/2013. 403 hours and climbing.
Home: CO15. KOSH x 5
Flying a B-Model Conversion (Super Bee Baby!)
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fastj22
 
Posts: 1594
Joined: Sun Aug 21, 2011 5:56 pm
Location: Mile High

Re: Spacing for throttle, mixture, trim

Postby Bryan Cotton » Fri Feb 03, 2017 9:05 pm

John,
That is why I am moving the trim to the right for more space. Our airplane noises were interrupted by "ow, ow" as our knuckles hit the mocked up mixture.

Somebody had a picture where they mounted a little knob on their dial a trim. Any pics/part numbers/sources? I searched but did not find.
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
User avatar
Bryan Cotton
 
Posts: 4957
Joined: Mon Jul 01, 2013 9:54 pm
Location: C77

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