Dihedral in RV14 (GMU-22)

[Reflex]

I'm installing a GMU-22 magnetometer in the left wingtip of my-14. Garmin calls for the GMU-22 to be not only level with regard to incidence but also for dihedral. A couple of questions:

• Anybody know what the dihedral angle is on the -14?
• If you put your magnetometer in the wingtip, how did you make or shim the bracket to allow for the dihedral angle?

[bkervaski]

Whats wrong with the stock location and bracket?

[Reflex]

Whats wrong with the stock location and bracket?

Great question.

Too close to heated pitot wiring, landing gear, etc. Garmin recommends wing tip mount (Walt too). Hard IFR on this one.

[JDA_BTR]

Stock location and bracket works great, even with pitot heat and landing gear and unshielded light wiring, etc. Unless you use a pitot heat controller; which I can't see why you would need to.

[rocketman1988]

If you follow all of garmin recommendations for location you will find the best place to mount the Gmu22 is 10 feet outside the fuselage, flying in close formation with the rest of the plane...

[bkervaski]

Not sure what hard IFR is but it works fine at the stock location regardless if you’re in IMC or VMC. Just about everybody uses the stock location for the GMU-22.

Anybody reading the thread use alternate mounting locations?

[JDA_BTR]

Putting it anywhere else is a pain. If I had to put it somewhere else it would be on a shelf in the upper mid fuselage. I don't have a shelf there......

[JHartline]

I put mine in the stock location, unregulated GAP26 pitot Heat, Vans (Stein) standard wiring harness, taildragger. Solid as a rock. It has flown several hours of actual IMC including rain and ILS and GPS/LPV to my personal mins of 500? and a bunch of acro too (THAT was in VMC). It passed all the interference tests, etc, flawlessly.

BTW - I didn?t even use a twisted pair for my pitot heat wiring. Just ran a ground up to the block on the firewall. GMU-22 didn?t even flinch during the interference test when I turned it on. Biggest reaction was when I moved the stick left and right. Go figure...

Just my opinion, but I have had zero problems using their suggested location. I believe Vans -14 has a Garmin panel and that plane has tons of hours flying all over the place. Not sure, but I bet theirs is in the same place. Scott would know.

[MED]

Originally Posted by bkervaski

Not sure what hard IFR is but it works fine at the stock location regardless if you?re in IMC or VMC. Just about everybody uses the stock location for the GMU-22.

Anybody reading the thread use alternate mounting locations?

I put mine in the left wingtip. After my friend had continuing issues with his GMU-22 in the stock location, which were resolved by moving it to the wingtip, I decided to follow suit. Vic also told me that he didn?t have problems with the factory plane, but if he was building, he would put it in the wingtip. It was an easy change. I just had Stein make the harness they build for Van?s ~10? instead of 2?. Have not had a problem with it. Another buddy has his in the stock location and has not had problems. Your choice. Do you feel lucky?

[Jetmart]

Originally Posted by MED

I put mine in the left wingtip. After my friend had continuing issues with his GMU-22 in the stock location, which were resolved by moving it to the wingtip, I decided to follow suit. Vic also told me that he didn?t have problems with the factory plane, but if he was building, he would put it in the wingtip. It was an easy change. I just had Stein make the harness they build for Van?s ~10? instead of 2?. Have not had a problem with it. Another buddy has his in the stock location and has not had problems. Your choice. Do you feel lucky?

Do you have the info the OP was looking for?
I'm interested .