Hello I've not posted on rah before, but have lurked long enough to realize that you guys have a few electronics experts among you. What I have is a Gentex sph-4 military flyers helmet. This is a single plug helicopter helmet. I've been told that the microphone impedence for military helmets is...

Happy New Year all! I am continuing to build my library of plans for airplanes that are rare or didn't make it for one reason or another. After 7 years of looking, I landed a set of plans for the Mead Adventure the other day. I am feeling lucky so I thought I would post a message and see what...

I remember seeing some time back a hangar design that used a circular dome style building. It showed GA airplanes all backed in and seemed like it used the space well. A Google search on round, circular, and dome aircraft hangars did not lead me to the hangar that I was looking for. Anyone...

We have one in our Glasair and I have never been really impressed with it's output. Seems to run around 13.1 volts most of the time except for right after engine start. The ammeter does indicate a net flow of current INTO the battery. That might seem all right but when I start putting...

Is anyone running a Rotax 914 with a C/S prop - and if so, which prop?

Actually I'm interested also to know if any other designs besides BD aircraft utilize wing spars that are made of aluminum tube. So if you know of any I'd like to know what they are.

Does anyone have an opinion of the LOM 180-250 hp engines? I am thinking about a homebuilt and like the price but have never seen one in person or talked with someone who flew behind one.

Jay Honeck wrote: Okay, gentlemen and ladies, compiled below is our roster thus far for the Thursday night "rec.aviation" get together at our campsite in the North 40. (Reminder: The procedure is as follows: After the air show on Thursday night, we rendezvous at our campsite. You must...

The following is to the best of my recollection. I haven't even changed the name of a buddy I was with during these events. I may be wrong about some of the statistics, like the number of divorces and number of hot babes in the restaurants, but I'm close. Almost none of this is an exageration...

An interesting tale I ran across... The Most Unbelievable Landing of a B-17 by George Ureke, Lt. Colonel, USAF (Ret.) Flying a bombing mission out of Foggia, Italy, off of Tortorella US Army Air Field in Italy, during W.W.ll, our B-17 caught one hell of a lot of flack. All four engines were still...

Hi Folks: The FAA made it official, and I appealed all the way, but the heart monitor put the stake in the plans I made. I am grounded. I was going to build a Renegade, Charlie Lasher's Formula V from the 80's. So, I have to forget building the plane. I have $300.00 of Wicks chrome-moly...

Invitation to Holland to NVAV’s 40th anniversary. (www.nvav.nl) The Board of the Netherlands Experimental Aircraft Association (NVAV) has the pleasure to invite foreign pilots and homebuilders you and your partner for a reception at the occasion of the NVAV’s 40th anniversary. The reception will...

I've got two questions some RAH folks might be able to answer. I've done some googling with no luck... What does/did(?) the Parker JP-350 look like? It seems it was a homebuilt unlimited racer with a big engine. Are there any pics out there? The American Air Racing site didn't seem to have any...

From the late Dr Petr Beckmann The Innovator's Dilemma - When New Technologies Cause Great Firms to Fail by Clayton M. Christensen, Harvard Business School Press (1997), is a very perceptive analysis of the dynamics of technological advance - especially the introduction of radically new...

I am wondering if there are any 4 place Vision builders out there who are almost finished building? I am considering building one myself and am just curious.

Several years ago I developed a software program to read engine RPM based on the sound that the engine makes. I now have a new version of this (free) software available which is much easier to use than the old verison. It runs on any Pocket PC, or any Windows laptop. You can use it to check the...

Having just driven a Segway for the first time, I imagined what a three dimensioanl version would be like. Spent some time online looking at Hiller's flying platform, which seemed closest. Was unable to find any information on current attempts to re-create the flying platform. Does anyone know...

As I mentioned in a couple of other threads in RAP recently, the trim jackscrew is very worn in our '74 Archer. The wear seems to be nearly half of the thread depth. In other words, you can move the screw laterally inside the drum about half of the height of a thread. It can be rocked angularly...

Roger Halstead wrote: I've been having a problem finding what I need to present to the FAA. They say you need the original bill of sale, but there never was one. Just an invoice stating price, what was there, and method of payment. I have a bill of sale from the estate and the original...

For those of you that are near to Las Vegas.... The memorial service for Bill is April 18th (Saturday) at Palm Mortuary 6701 N. Jones Blvd. Las Vegas, NV 89131 starting at 1:00pm (702-464-8470) (800-542-2902) Bill died in the crash of his homebuilt airplane on October 18, 2008 near Parowan,...