Hi Steve,
Like others stated: there are really 2 tests, both can be done by any avionics shop even on experimentals as they are pretty standard systems.
1) Transponder/encoder. Required if you will use your transponder.
2) Pitot/static/altimeter (only required for IFR - and the pitot system cannot fail). For this test you will probably want to be present if you have an experimental altimeter (like the GRT, Dynon, etc...) that needs to be calibrated. Even if you do not plan to fly IFR, you should either do this or do something like what Al describes to give you a general idea that everything is working and accurate (must be done by the shop to be legal for IFR).
-- David Leonard Turbo Rotary RV-6 N4VY http://N4VY.RotaryRoster.nethttp://RotaryRoster.netOn Sun, Jan 17, 2010 at 8:59 AM, Steve Thomas <glasair2@me.com> wrote:
Al,
Yes, please, send the graph of in. of water vs. airspeed. Is there a graph of in. of water to altitude? I have a how-to from EAA that goes through all of the calculations here:
But if there is a graph, that would be a lot easier.
Best Regards,
Steve Thomas _______________________________________________________
On Jan 16, 2010, at 11:36 AM, Al Gietzen wrote:
Transponder is required in any mode C veil, so you'll probably need that certified as stated in the regs. It only takes the shop 10 minutes to do it, but expect to pay $100+.
The pitot system you can check yourself. Rig a water manometer of clear vinyl tubing with a scale behind it. Connect one side (leg) to your pitot tube; move the other leg up and down to vary the difference in the height of the water column. Use a graph of airspeed vs in. of water to check your instruments. (I can scan and send you one if needed). Later when you're flying you can check the accuracy of your static port by flying 50 over your runway, and see if the altitude matches your altimeter. Then check your pitot by comparing IAS withGPS GS by flying for 1 minute in each of four orthogonal directions and average the readings for each.
Al
-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Steve Thomas
Sent: Saturday, January 16, 2010 9:49 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Pitot/Static & Transponder Cert.
I'm ready for a pitot/static and transponder check and I'm wondering a couple of things:
1. I'm in Santa Barbara, CA and my local avionics shop is not only horribly expensive, but also has little or no experience with experimentals. Can anyone recommend an avionics shop in the Southern California area that knows how to work with us? Anyone out there mobile?
2. Any advice on how to do this with the least amount of pain?
3. Is the certification required for the DAR? Can I get my final inspection done before the pitot/static thing and then fly somewhere else for the certification?
Thanks to everyone for all the help and many many posts on all subjects rotary. I want to be in the air in February.
Best Regards,
Steve Thomas
Glasair Super II RG
Mistral Rotary
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