I have been looking at some of the pics people at Oshkosh have been posting and was wondering about the design of the flaps on some of these planes. Instead of the whole trailing edge of the wing hinging down like most planes I am familiar with, only the bottom skin of the trailing edge hinged...

I'm sure everyone here is familiar with the combination of the horizontal stabilizer and elevator to make a stabilator. I think I have even heard of the concept being used for a ruder. My question is has anyone ever made a plane taking the concept all the way and made a "wingeron"? My guess...

Do we have any who is a math whiz here? I want to find a formula to calculate the position of an airplane throughout a 1G roll. The reason I'm doing this is so I can build a "roll track" for a remote control car so the car will alway have a positive g force on it to keep it on the track. Anyone...

please ignore

Can someone tell me where I can find more information on the design of a reverse NACA duct? -- Chris W "They that can give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety." -- Benjamin Franklin, 1759 Historical Review of Pennsylvania

It is my understanding that the computers in cars use oxygen sensors in the exhaust and not EGT to keep the mixture right. My question is why not use oxygen sensors in airplanes? Is EGT easier to interpret when it's a human instead of a computer controlling the mixture or is it just that it's...

A few questions, for those in the know: Both of the radio-controlled biplanes I've owned were designed with the lower wing at a higher AOA, so that it stalled first. They also had the upper wing farther forward than the lower. If the lower wing stalls, the CG will be a little on the aft side of...

I visited Old Rheinbeck Aerodrome, and fell in love with the Heath Parasol hanging from the ceiling. The spec sheet says it weighs 260# empty, meaning a little trimming should bring it to 103 specs, if the stall speed is low enough. Are plans still available? I understad the Pober Pixie is...

I was wondering if anyone here had any direct experience with these planes, and could give me some basic info? Can they be made 103-legal? Are plans still available? How easy to build & fly, stall speed & characteristics, etc.?

I'm using thin polyster fabric on my Easy Riser, and the old fabric was sewn together at the leading edge. The trailing edge was just glued to the frame. Can I simply glue the leading edge tubes to the fabric, as well as the trailing edge? If sewing is necessary, how do you get two 16' sections...

Has anyone here any familiarity with using Mylar as a skin, like on some ultralights and hang gliders? What about similar types of plastic sheeting?

http://www.boston.com/news/globe/city_region/breaking_news/2006/04/homemade_planes.html http://www.msnbc.msn.com/id/12269326 http://www3.whdh.com/news/articles/local/BO17682/ http://www.townonline.com/melrose/localRegional/view.bg?articleid=470880 Does anyone know what kind of plane he was...

How are "normal" airplane engines tuned to run at a lower rpm? What changes would have to be made to an automotive engine to shift the power band down accordingly?

I'm considering a Nieuport 11 ultralight, and I was wondering if anyone here has flown one, or heard anything about how they fly. Will they fly hands off, or do you constantly have to stay on top of things? Are they easy to ground-loop?

I was wondering about the feasability of covering a wing on an ultralight with Monokote, which is normally used on R/C aircraft. If the tensile strength is too low, could you use 2 or more layers?

I'm building a Hummelbird, and I was hoping to use it towards my private pilot's license, but I've heard that I can't use an experimental for flight training. I looked through my FARAIM '97 and I can't find anything to verify that. Has anything changed regarding this since then? Can someone point...

Now that they're going to start enforcing the weight limit on Part 103, and since the Rotax 277 is no longer made, isn't it about time for a new engine/ultralight design? We've got carbon fiber to build a lighter plane, and I'm sure technology has advanced enough to build a lightweight 4-stroke...

Ok, here goes... About 2 years ago I had a chance to buy some small radial engines at a car show, there were perhaps 25-36 inches accross, I cant remeber, I had a chance to buy em at $40 each and there were 10 or so in various states of disrepair, but since I had spent all my money alloted by...

Hello all I posted a query some time ago looking for information on an engine, Thanks to all the people that responded. I had, though I had a source for some of these but he sold all he had about a year ago. I am in pretty desperate need of this engine it is a 5-cylinder B-75 Lawrence radial...

Hi all new to the group and looking for info on local flyins I am in Ga. and understand there is one planed for march in Dublin. any info would be great Thanks Chris Whitley