Rigging

[peevee]

I wonder if we couldn't tweak for a few kts but then it sounds like a can of worms I don't want to open.

[carusoam]

Can of compromises... lift vs. speed.

Once you go outside the guidance, all the airspeeds documented on the ASI could possibly get wonky.

wonky- technical term indicating that I'm only a PP, not a, aero-engineer... 

Best regards,

-a-

[xcrmckenna]

This is N201NU in straight and level flight. I'm taking her to Advance in Troutdale mid June to have them look at the squat switch/ maybe airspeed switch issue. Should I have them check the rigging? Dave at Dugosh put their travel boards on it at annual but it does seem to pull a little to the left. Was wondering if someone adjusted the right aileron to comp for it.


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[XXX]

8 hours ago, Bryan said:

what does a travel board look like?

I have been working on recreating one from an original. I was able to get the shape done in CAD and had one cut out of 1/4" aluminum on a waterjet. The difficult part is getting the degree markings transferred to the board. The guy at the shop thinks he can get the measurements into the CAD program but it will take some trial and error. If he can, they can be cut in by the waterjet. At this point I have a couple hundred bucks into the Aileron/flap board. I used a sharpie for the markings. 

[XXX]

10 hours ago, Mike@Loves said:

I am based @ 97FL (Love's Landing) just south of Leesburg, FL. I would like to get my flight controls rigging checked. I really like the sound of AGL @ KMRN, but it  is a trek to get home. Can anyone recommend some one closer that have the rigging boards and expertise?

Mike, 

I am just up the road from you. You are welcome to use my homemade flap/aileron board to check your rigging. I dont have the elevator or rudder boards. My mechanic is out of town till July working on 737's but he rigged mine and did a great job. I'm sure he would be happy to do yours if you find them out of rig. 

Steve

 

[carusoam]

Charles, nice pix.

See if you can get the blue stained rivet head sealed while you are working on this project.

Kind of a while you are in there sort of thing... 

Best regards,

-a-

Edited May 27, 2017 by carusoam

[Guest]

In the absence of a travel board, the aileron tip balance weight should be streamlined with the wing while in flight. This of course does not tell you if total up and down travel is correct.

It is not in common to rig the ailerons with some droop so that in flight they tend to pull any play out of the system.  I would think that any speed gain from raising the ailerons in flight would be offset by drag from the weight hanging in the slip stream.

The Piper Comanche series with enclosed balance weights gain speed by re flexing the aileron up as much as 3 degrees.  I've never tried this on a Mooney.

Clarence

[Bob_Belville]

My E model was flying very, very straight hands off, feet on the floor, until we corrected the rigging a degree or two. After that she wanted to drop the left wing a little. I've been tweaking the trailing edge of the right aileron just using my fingers to turn the trailing edge down slightly. I suppose I'm undoing an earlier "fix" that we applied when I first bought the plane, before Lynn have the travel boards. These planes were hand made!

[N201MKTurbo]

The travel boards will just get you to a starting point. You always have to do some test flying and tweaking to get it to fly straight.

I did some experiments with my old plane about 30 years ago and the higher you rig the flaps and ailerons the faster the plane goes. You are limited by the inboard flap fairing. 

The height of the flaps and ailerons has nothing to do with having a heavy wing. The best way to fix a heavy wing is to adjust the flap up stops. Start with a 1/4 turn down on the heavy wing and a 1/4 turn up on the light wing.

If the plane flys straight without a heavy wing but the ailerons are uneven then you will have to adjust the trailing edge to even them out and re-adjust the flap stops. It is a bit of back and forth.

[peevee]

34 minutes ago, N201MKTurbo said:

The travel boards will just get you to a starting point. You always have to do some test flying and tweaking to get it to fly straight.

I did some experiments with my old plane about 30 years ago and the higher you rig the flaps and ailerons the faster the plane goes. You are limited by the inboard flap fairing. 

The height of the flaps and ailerons has nothing to do with having a heavy wing. The best way to fix a heavy wing is to adjust the flap up stops. Start with a 1/4 turn down on the heavy wing and a 1/4 turn up on the light wing.

If the plane flys straight without a heavy wing but the ailerons are uneven then you will have to adjust the trailing edge to even them out and re-adjust the flap stops. It is a bit of back and forth.

Man, you're tempting me to do things I have no business doing

It'll end up being one of those things that once I start messing with it I never stop.

[N201MKTurbo]

43 minutes ago, peevee said:

Man, you're tempting me to do things I have no business doing

It'll end up being one of those things that once I start messing with it I never stop.

Oh, it's good clean fun and it doesn't cost much.

The worst thing you can do is make your plane fly real crappy.

Edited May 27, 2017 by N201MKTurbo

[peevee]

2 hours ago, N201MKTurbo said:

Oh, it's good clean fun and it doesn't cost much.

The worst thing you can do is make your plane fly real crappy.

it's all fun and games until the wing off light comes on