Do you still have RFI when you pull the breaker on the Prop Control? Do you have noise when the engine is off? Do you have noise when the prop is changing pitch? Respectively these circumstances coul
Hi Paul, I have a UMA "Rotax" tach working fine as a tach. The internal hobbs switch however has never worked. The tach has been working for at least 60 hr. If you purchase one, be sure to put a conn
Hi Dave, Welcome and thank you for your interest (and more) in Europa! I have a few comments about the new specs with particular reference to the XS Trigear with the 912uls 1) There is no long range
Hi Dave, Welcome and thank you for your interest (and more) in Europa! I have a few comments about the new specs with particular reference to the XS Trigear with the 912uls 1) There is no long range
Hi All, Thanks for the input Remi! I think Rotax is using a sleigh of hand, inconsistently using a moving target for power output. The engine is advertised as 100 hp, and only in fine print does one
For fun, here is some of my fight test data from June 2006 demonstrating the lack of altitude compensation of mixture in the Bing 64 carb. I keep hoping that someone will report (favorably) on the Gr
Hi Remi, The table is engine performance with a constant speed (AirMaster) prop. All certificated manufacturers provide a table like mine which shows the relationship between throttle, selected RPM,
Hi Remi, Very Interesting! Your suggestion that a normally aspirated engine will develop more power at 8000' than at 1000' is quite curious. The fraction of oxygen is stable in the troposphere at 20.
Hi Paul, My money is on a leaking connector also, hopefully easier to repair than a split hose ;-) Best Regards for a new year, -- Ira N224XS Read this topic online here: http://forums.matronics.com/
Hi Remi, Remember how I used that fine old French chemist, Gay-Lussac, to show that an isobaric drop of 14C gives only a 5% change in density - scarcely measurable in the performance of a Europa, i.e
Hi Bud, Thank you for your illuminating comments! Always a pleasure to be enlightened by a pro! See you at SnF I hope. -- Ira N224XS Read this topic online here: http://forums.matronics.com/viewtopic
Hi All, Bud was bemoaning the lack of data on Europa props. Here is a short article on how to estimate prop performance by John Lowry: http://www.avweb.com/news/airman/182418-1.html Lowry is the auth
A small follow-up on the power vs altitude issue. The power increase that occurs with altitude at constant MAP is due to the drop in pressure to which exhaust gas is vented. Lowry, JT: Performance of
Hi Giles, The link I provided is the Constant Speed discussion. There is nothing too tough here. Give me a few weeks of decent flying weather and I will try to have results. First I need a table to c
Hi Remi, Here is an excerpt from another book: Ojha SK: Flight Performance of Aircraft. The basic bottom line is that engine performance is measured and recorded in standard atmospheric conditions wh
New Year's Day and I am out at the hangar measuring the prop per John Lowry's method. My prop is a bit larger than the factory recommended standard size since I built a tri-gear:-) The BAF is the Bla
Dear Rowland, I am so sorry to hear about Wilma. At least it seems she did not suffer the prolonged usual route of ovarian Ca. Please accept my condolences. Ira -- Ira N224XS Read this topic online h
Not just carbon fiber, Terry, Any parts that have been baked in an oven in order to raise the glass transition temperature will have a higher temperature tolerance and can therefore tolerate a color
Hi Bob, Sorry for the delay in my response about belt attachments. I followed the guidance of AC21-34 (?, but cited in this group in 2007) I also showed it to Andy Draper at SnF when he was still wit
Hey Guys, Its simple physical chemistry. FRP materials like fiberglass layups have a property of softening at a specific temperature known as Tg. Tg is sensitive to the particular temperature exposur