Mixture Control

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

Mixture Control

Postby BobDz » Thu Feb 29, 2024 9:57 am

Good morning fellow builders

Today's "shopping" question.

Has anyone used Spruce's A-740 Ratchet Control for their mixture control? Seems like a nice option.

TIA
Bob Dz...
Sonex B, Tri-gear
(technically within walking distance of Sonex)
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Re: Mixture Control

Postby daleandee » Thu Feb 29, 2024 12:58 pm

BobDz wrote:Good morning fellow builders

Today's "shopping" question.

Has anyone used Spruce's A-740 Ratchet Control for their mixture control? Seems like a nice option.

TIA


Yes. You can hear it in this video (about the sixty second mark) as I go full rich before engine start. It has worked very well.

They are available with a red knob. I like it because my carb heat is next to it and if I should move the wrong one (hasn't happened yet but could I guess) the ratcheting motion (or not) let's me know which control I have moved.

https://www.youtube.com/watch?v=0afcagd70UE

Hope this helps ...

Dale
3.0 Corvair/Tailwheel
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Re: Mixture Control

Postby BobDz » Thu Feb 29, 2024 1:25 pm

daleandee wrote:
Hope this helps ...

Dale
3.0 Corvair/Tailwheel


It does!
Thanks Dale!
Bob Dz...
Sonex B, Tri-gear
(technically within walking distance of Sonex)
N624DZ (reserved)

Plans exist to eliminate confusion, not create it.
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Re: Mixture Control

Postby builderflyer » Fri Mar 01, 2024 10:50 am

BobDz wrote:Good morning fellow builders

Today's "shopping" question.

Has anyone used Spruce's A-740 Ratchet Control for their mixture control? Seems like a nice option.

TIA


I'm currently flying.with this control for mixture and do not recommended it. As others have found and reported, it creeps during flight. The ratchet isn't strong enough to hold for the vibration we have in our airplanes. If you don't wish to go the full vernier version of mixture control, others have found that a push button form of control works much better than the A-740. Hope this helps.

Art,,,,,,,,,,,,Sonex taildragger #95,,,,,,,,,,,,,,Jabiru 3300 #261
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Re: Mixture Control

Postby Bryan Cotton » Fri Mar 01, 2024 11:37 am

I have a full vernier mixture and it is awesome. I also find that if friction is not dialed up on my throttle it creeps in pretty quickly.
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
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Re: Mixture Control

Postby BobDz » Fri Mar 01, 2024 12:49 pm

In my never ending quest to avoid the 2.5 multiplier, I have found many locking throttle cables in the $30 to $50 price range.
Bob Dz...
Sonex B, Tri-gear
(technically within walking distance of Sonex)
N624DZ (reserved)

Plans exist to eliminate confusion, not create it.
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