Original Posted By: Rcaprd(at)aol.com
Subject: Pietenpol-List: johnson airspeedRogers,HI, I too am doing a barebones piet and am using a windvane type indicator. I did some web searching and came up with some good photos, then was able to borrow one from Old Rhinebeck for measuring, so I've got drawings. they are occassionally available in batches by various guys but they're really expensive. I could send you my measurements if you want.I'm making a WWI type strut mounted anemometer airspeed indicator reproduction which will be really cool. LIttle spiining brass cups on top of a hourglass shaped aluminum housing with a dial on front facing the cockpit. I"m going to use one on mine, but they'll be awefully expensive for your average piet, and way overkill. The johnson is definately the way to go.Regarding instruments, remember the FAA dictates mininum instrumentation, so you'll need oil pressure and temp, or water temp, magnetic heading indicator (compass) airspeed of some sort, and altitude. slip indicator is not mandatory legally.Douwe________________________________________________________________________________