Van's Air Force
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Vans Steam Airspeed indicator off
- Thread starter celstar
- Start date
lucaperazzolli
Well Known Member
mine
don't move until 60 Mph, just second before take off.
don't move until 60 Mph, just second before take off.
Last edited:
To properly determine instrument error, you need to send your ASI to a shop that can calibrate it. You will get a table with calibrated airspeed versus indicated airpspeed (and an invoice!). The difference is instrument error. Only then can you say that your Van's airspeed (or one from another manufacturer), is off by XX knots. Once that is determined, you can proceed to find position, or static source error, using one of many good methods. Calibrated airspeed = indicated airspeed corrected for instrument error and position error.
celstar
Well Known Member
speed range
Is it common to have a error that s just in a certain range or is it usually over the entire speed range?
Is it common to have a error that s just in a certain range or is it usually over the entire speed range?
carguy614
Well Known Member
Asi speeds
Mine too. My aircraft uses a Vans ASI as backup to my Dynon D120. I have 2 pitot tubes. One is the standard vans tube plumbed to the Back up ASI, and the other is the Dynon AOA, plumbed to the D120. Both instruments share the same static source. The Dynon reads within 2 MPH of calm air GPS ground speed, but the steamer is 7MPH faster at low speed, and about 5 MPH faster in cruise. One of these days I am going to swap pitot lines to determine if it is the instrument or the pitot input. Anyone else used 2 pitots??
Regards,
Chris
Mine too. My aircraft uses a Vans ASI as backup to my Dynon D120. I have 2 pitot tubes. One is the standard vans tube plumbed to the Back up ASI, and the other is the Dynon AOA, plumbed to the D120. Both instruments share the same static source. The Dynon reads within 2 MPH of calm air GPS ground speed, but the steamer is 7MPH faster at low speed, and about 5 MPH faster in cruise. One of these days I am going to swap pitot lines to determine if it is the instrument or the pitot input. Anyone else used 2 pitots??
Regards,
Chris
To test, hook both to one pitot.
