Original Posted By: "w b evans"
Barry asked:>What is the part # you decided on from McMaster Carr? Is it the white>with a yellow stripe?And Terry replied:>the following die spring part number based on some eyeball engineering.>The max compression travel for our gear (per Hatz CB-1 plans) is>approx. 2.5 inches. So we thought the spring rate 392 lb/in should be >about right.>It seems very stiff, but the proof will be in the completed pudding. It>was bare steel, not painted.Take a look at the second (or the last) picture at http://www.flysquirrel.net/cowling/cowling.html which is my little "Flying Squirrel" just sitting on its gear. The landing gear shock strut springs in the picture are at least 3/4 compressed and this is just the fuselage and engine, sans wings, tail group, instruments, and a whole bunch of other stuff. The Squirrel grosses 800 lbs. at design. Anyway, the white springs with blue stripe supposedly provide 264 lb./in. and 460 lbs. at full deflection (McMaster-Carr #9297K84) and that ain't gonna be enough! So I now have heavier ones, I think they are black with a bronze stripe (McM-C #9588K3). They feel really stiff, but like Terry says, the proff will be in the pudding and "too stiff" might not be stiff enough.Oscar ZunigaSan Antonio, TXmailto: taildrags(at)hotmail.comwebsite at http://www.flysquirrel.netConcerned that messages may bounce because your Hotmail account has exceeded ________________________________________________________________________________
Pietenpol-List: landing gear springs/was weight loss program
Re: Pietenpol-List: Marathon or Shell ?
Original Posted By: "Michael D Cuy"
Mike,Chilly and breezy here in north NJ. Predicting in the 20's tonite.I decided long ago when I had some auto fuel in the Piet to test run it andthe rubber gasket on the approved fuel cap started to distort and get"gooshey". Auto fuel around here is upwards of $2.00 per gal ( even sawpremium east of the hudson near Sleepy Hollow at $2.22 per gal.)With AV gas at $2.60 gal and 4 gal/hr burn,,,,,figured that with an extra$4.00 per hour to fly my great Piet over the countryside with no worries,was well worth it. Right now I'm sticking with the AVgas.walt evansNX140DL----- Original Message -----
Mike,Chilly and breezy here in north NJ. Predicting in the 20's tonite.I decided long ago when I had some auto fuel in the Piet to test run it andthe rubber gasket on the approved fuel cap started to distort and get"gooshey". Auto fuel around here is upwards of $2.00 per gal ( even sawpremium east of the hudson near Sleepy Hollow at $2.22 per gal.)With AV gas at $2.60 gal and 4 gal/hr burn,,,,,figured that with an extra$4.00 per hour to fly my great Piet over the countryside with no worries,was well worth it. Right now I'm sticking with the AVgas.walt evansNX140DL----- Original Message -----