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  #1  
Old 11-28-2018, 10:19 PM
mfleming's Avatar
mfleming mfleming is offline
 
Join Date: Sep 2016
Location: Joseph, Oregon
Posts: 799
Question Cessna Style Flap Switch Mod

I've searched but have not come up with any information on installing a Cessna style flap switch with detents in a Van's aircraft.

I'm currently flying a C-172 with a spring loaded switch like the one for my -7. I absolutely hate it
Could I get used to it? I'm sure I could but since I'm building my own plane I'd like to see if using a Cessna style switch with would be feasible and reasonable.

A flap switch like this:
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Joseph, OR
sagriver at icloud dot com

RV-7 Slider #74572
Started 11/2016
Empennage completed 11/2016 (sans fiberglass)
Ailerons and flaps completed 3/2017.
Wings completed 12/2017
Started on QB fuselage 01/2018
Sliding canopy mostly completed 10/2020
Wiring and Avionics harness completed 9/2/2021
FWF Started 9/3/2021

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  #2  
Old 11-28-2018, 10:43 PM
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N941WR N941WR is offline
 
Join Date: Jan 2005
Location: SC
Posts: 12,887
Default

I really wanted to install one of those in my plane but couldn't find one.

I realized it wasn't necessary as I pot the flaps all the way down abeam the numbers, regardless of the wind.

Good luck, I hope you find one.
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  #3  
Old 11-28-2018, 10:58 PM
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rolivi rolivi is offline
 
Join Date: Feb 2015
Location: Fort Worth
Posts: 558
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Would this work for you? https://showplanes.com/ecom-prodshow/FPS.html

I do the hold and count for my flaps. I guess it just hasn't risen to the top of my improvement list yet.

BTW, that paddle switch drove me crazy in the Cardinal. I had a bad habit of hitting it when I didn't want to when I was futzing with the A/P.
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  #4  
Old 11-29-2018, 12:16 AM
wnplt wnplt is offline
 
Join Date: Feb 2013
Location: Idaho
Posts: 227
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There is a lot of micro switches in the flap system to make it all work right.
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  #5  
Old 11-29-2018, 07:49 AM
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Carl Froehlich Carl Froehlich is offline
 
Join Date: Dec 2007
Location: Dogwood Airpark (VA42)
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Quote:
Originally Posted by rolivi View Post
Would this work for you? https://showplanes.com/ecom-prodshow/FPS.html

I do the hold and count for my flaps. I guess it just hasn't risen to the top of my improvement list yet.

BTW, that paddle switch drove me crazy in the Cardinal. I had a bad habit of hitting it when I didn't want to when I was futzing with the A/P.
+1

This flap positioning system (also sold by Van?s) is what I put in three RVs. Just a bump and it goes to the next postion, another bump and it goes again, flip your flap switch up and they go up and stop. Simple.

This system also is a perfect match for a flap toggle switch on your Infinity Stick Grip.

Carl
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  #6  
Old 11-29-2018, 08:25 AM
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Xkuzme1 Xkuzme1 is offline
 
Join Date: Jan 2015
Location: KC, MO
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I don?t know about you guys, by my flaps are either up or down. The only time I use anything between is when I?m lead during a formation landing then, I use half flaps.

I am all for personal customization to make it better. Not sure incremental flaps makes it better unless you have some highly specialized need.

That being said... I look forward to seeing pics and reports of the final product of you continue.

Tinker
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  #7  
Old 11-29-2018, 09:19 AM
Robert Anglin Robert Anglin is offline
 
Join Date: Mar 2008
Location: houston, texas
Posts: 900
Default Colors.

We use the colored bar system out on the flap itself. I take a Sharpie and color maker each 10* hash, then shade it in in that color. The first bar is about 2.5" long and each bar above that is another 2-2.5" longer than the last station. We practice and use all the flap settings and everything in-between.
This keeps it simple and easy to use. The flaps on an RV work well but are not of the same type as the Cessna. The drag and pitch changes are not the same. We like to practice with the flaps at all settings and use them as the airport we are arriving at dictates or slow flight is needed. Think KOSH at 70-90 Kts. Once you get up and flying with your RV you will get used to the flaps on an RV and I think you will find they won't be any big problem for you.
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  #8  
Old 11-29-2018, 09:29 AM
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rocketbob rocketbob is offline
 
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Location: 8I3
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Flaps in a RV are less effective, and have considerably less trim change on deployment compared to a 172. So it seems like these systems add quite a bit of complexity for very little gain. In the RV I normally teach half flaps unless you're high and need more drag. The difference between exactly half flaps and something in that ballpark is so negligible that it's not worth worrying about.
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  #9  
Old 11-29-2018, 10:14 AM
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Carl Froehlich Carl Froehlich is offline
 
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Location: Dogwood Airpark (VA42)
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Quote:
Originally Posted by rocketbob View Post
Flaps in a RV are less effective, and have considerably less trim change on deployment compared to a 172. So it seems like these systems add quite a bit of complexity for very little gain. In the RV I normally teach half flaps unless you're high and need more drag. The difference between exactly half flaps and something in that ballpark is so negligible that it's not worth worrying about.
For RVs other than the RV-10 and RV-14 this is right. Half flaps provide lift. Full flaps provide little more lift but much more drag. I aways land with full flaps.

For the RV-10 and RV-14 the flap are far more effective across the flap extension range. They also have a very noticeable effect on trim. Taking off with half flaps is like riding an elevator.

Carl
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  #10  
Old 11-29-2018, 10:58 AM
mfleming's Avatar
mfleming mfleming is offline
 
Join Date: Sep 2016
Location: Joseph, Oregon
Posts: 799
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Quote:
Originally Posted by Xkuzme1 View Post
I don?t know about you guys, by my flaps are either up or down. The only time I use anything between is when I?m lead during a formation landing then, I use half flaps.

I am all for personal customization to make it better. Not sure incremental flaps makes it better unless you have some highly specialized need.

That being said... I look forward to seeing pics and reports of the final product of you continue.

Tinker
This makes sense...The -7 flaps ARE tiny compared to the barn doors on a Cessna.
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Michael Fleming
Joseph, OR
sagriver at icloud dot com

RV-7 Slider #74572
Started 11/2016
Empennage completed 11/2016 (sans fiberglass)
Ailerons and flaps completed 3/2017.
Wings completed 12/2017
Started on QB fuselage 01/2018
Sliding canopy mostly completed 10/2020
Wiring and Avionics harness completed 9/2/2021
FWF Started 9/3/2021

Donated for 2021 and so should you
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