Van's offers RV-12 AOA kit

[Dgamble]

Originally Posted by Sunriver Ken

I simply slid a 12" #30 drill into one end of the plastic tubing and masking taped them together. Other than that it was simply long arms moving the tubing through the channel. Eazy Peazy.

We're on this step right now and finding that 48" of clear tube isn't enough to reach both the J-channel and the 2nd rib from the wing root - did you have anything like this, or am I doing something wrong? Also unclear on how to reach far enough into the wing to tie wrap the tube to the J-channel along the way.

[rvbuilder2002]

Totally off topic...
I noticed on your web page your discussion about tracking time for maint. and that tach. time was the preferred method for engine maint.

That is true for a Lycoming, etc., but not for a Rotax.
Rotax specifically specifies that Hobbs time be used.
The reason is that low speed operation (particularly idling) is not consider a lower wear operation mode. In a Rotax it is actually higher because iddling causes a higher level of wear in the gear box.

That is why the settings file from Van's doesn't have the tach time configured on the display.


Posting here so that people that refer to your web site don't misconstrue your information as being standard procedure.....

[Sunriver Ken]

Originally Posted by Dgamble

We're on this step right now and finding that 48" of clear tube isn't enough to reach both the J-channel and the 2nd rib from the wing root - did you have anything like this, or am I doing something wrong? Also unclear on how to reach far enough into the wing to tie wrap the tube to the J-channel along the way.

I do not remember having any issues. We simply followed the instructions. Re. the tie wrap. We did what we could but I don't think we could reach all locations.

[Dgamble]

Originally Posted by Sunriver Ken

I do not remember having any issues. We simply followed the instructions. Re. the tie wrap. We did what we could but I don't think we could reach all locations.

Okay, thanks. We'll do what we can with the J-channel once we get a longer length of hose. 48" just doesn't reach once we lead it back to the J-channel.

[Cyclone]

I pulled the tubing thru the J channel using a spare hinge wire. Then applied a little RTV at each rib with a dab on the end of a remodeled fishing pole. I considered it my first attempt at 'fly fishing'....sorry

[HansLab]

Originally Posted by rvbuilder2002

Yea, that's what we did also and we found that it wasn't quite ideal.
The airflow and surrounding pressure around the pitot tube is apparently not the same as it is down at the surface of a large wing panel.
We found that the stagnation point at high angles of attack was getting close enough to the AOA port that it began to have influence on accuracy.

I think our final position is more like 20 degrees.

I intend to build in a boom mount Dynon pitot/AoA: through the spinner.
(http://www.dynonavionics.com/aoa-pitot-probes.php)

It saves the hassle of connecting and reconnecting the wings (I'll dismantle the RV after every flight), and saves the risk of leaks.
Since the boom isn't underneath 'a large area such as the wing' the angle of incoming air is to be expected more 'clean'.

What does VAF think of this possibility, please?

[rvbuilder2002]

Originally Posted by HansLab

What does VAF think of this possibility, please?

Well, since it was a post of mine that you quoted, I will offer that I think you would be adding a lot of work complexity and expense for zero benefit.

If the RV-12 AOA kit is installed per the instructions (specifically, the port is properly located) the system works great, and there is no connections to deal with when removing or installing the wings... the connection for the pitot port happens automatically.

[yankee-flyer]

or only with the Skyview? And is there finally a part number for the new canopy latch?

Wayne 120241/143WM

[rvbuilder2002]

Originally Posted by yankee-flyer

or only with the Skyview? And is there finally a part number for the new canopy latch?

Wayne 120241/143WM

This style AOA port was first used on D-180's by many RV-12 owners so the kit should work.

The first finish kit hasn't shipped yet but the orders people at Van's may be able to help since it is getting close.

[lr172]

Originally Posted by rvbuilder2002

Yea, that's what we did also and we found that it wasn't quite ideal.
The airflow and surrounding pressure around the pitot tube is apparently not the same as it is down at the surface of a large wing panel.
We found that the stagnation point at high angles of attack was getting close enough to the AOA port that it began to have influence on accuracy.

I think our final position is more like 20 degrees.

Scott,

I plan to follow this approach on my 10. Can you elaborate on how similar or dissimilar the 10 wing is from the 12 wing? Would you expect the 20* orientation to also work well on the 10 wing. I realize that no testing has been done for the 10 and i am in experimentation territory.