I am involved with the building of a velocity, and questions are flying around about propeller choice. For in-flight adjustable, we are limited at this time to an electric control, such as MT or IVO. Cost is pushing our options in this area towards the IVO. I have heard of some vibration/resonance...

The two main methods for homebuilt construction would be casting vs. machining or some combination of both (probably the best option). Forging probably isn't appropriate for home construction (either the piston or connecting rod). One method I have thought of is to produce a wax model of the...

I'm working on a Hummel Aviation Ultracruiser Plus. The way the engine mounts is quite different from the mounts on most VW powered homebuilts. The Conventional Wisdom bolts the thing to the firewall using the clucth end bellhousing, often with an accessory case in between. The Ultracruiser Plus...

Why do we homebuilders use 4130 tube? My old Aeronca does just fine being made of mild steel. A bit of napkin calcs says that going up just one tube diameter for the size tube we normally use, the area, and the strength/weight goes up between 15% and 20%. This pretty much offsets the difference...

You blithering idiots! You re-elected that imbecile George Bush as your President. He’s a complete moron and so are most of you! - Which still leaves us well above you! Don’t you care what the rest of the world thinks of you? Don’t you care what

Ok, one more round of it: does anyone have a set of Airbike plans for sale, or know of the German website that was/is producing them (newairbike.com)? Thanks

Have they tried dimples on radio controlled aircraft? The size and speed could designed around the magic Reynolds number = 100,000 where the coefficient of drag drops precipitously. Dimpling could vastly extent the range of large and slow as well as small and fast radio controlled aircraft. A...

I'm interested in building a Spratt 103, see www.spratt103.com. I like to hear from anyone with specific information about it's flight qualities, based on the actual experience of flying one or observing its flight. About 200 plans have been sold world wide and as it isn't a 10 year build, surely...

How does a person determine what the proper height of an engine should be when building an airplane? If a particular engine design mandates the prop is 4 inches, say, lower than where it would be with the engine originally installed, what effect will it have on handling, and what changes in...

I had posted a link to a vid of a 701 weaving through the trees over on .piloting. At some point down the line I expressed interest in a VW powered 701. One guy said he figured a VW would melt down in an aircraft cowling when producing no more that 50HP. He provided a link to Bob Hoover's blog,...

On Monday, 17 April 1995 17:00:00 UTC+10, Steve Meassick wrote: I will be installing a subaru EA-81 engine in the KR-2 that I am building and was wondering which reduction drive on the market was the best. I know of a couple of reduction drive manufacturers- RFI in Albuquerque, NM,...

On Tuesday, July 17, 2018 at 6:00:42 PM UTC-4, Victim of Aircraft Theft wrote: He has in his possession a Super Cub project stolen from KFQD. He is a sleazy real estate agent, Mooresville,NC, with a 34' trailer for the purpose of thievery. EAA Chapter 309 is in on this grand larceny...

I'd posted this in the "liar and fraud" thread but someone suggested nobody would see it as that thread had kinda petered out. It's a good summary of the reality of Bush's Guard record: "Juan Jimenez" wrote in message ... richard...

Last revised on October 6th 2002. Updated information on owner-maintenence. This document attempts to answer common questions asked by newcomers to the rec.aviation.homebuilt newsgroup, or those curious individuals unfamiliar with the domain of homebuilt aircraft. It assumes that the reader...

Seems to me that some of the benefits of the constant speed prop were based on the limitiations of timing (ignition and valve) of the Lyco/Conti engines. If your engine was designed to have a large dynamic range of efficient operation, you won't need the articulated prop as much.

I notice that most auto engine conversions use a gear box between the engine and the prop. Why is that? Is it because an auto engine's peak HP is too high for a prop to swing? Is it because auto engines weren't designed to be pulled around by their crankshafts and don't have proper thrust...

Hey guys i'm a new pilot that really wants to build his own craft. help me with this one issue. I want to use a chevy ls2 or ls7 as the power plant in my craft. now looking at everything including the hp/torque curves i've decided running the engine around 3100 rpm should give me around 250 hp...

My homebuilt's master contactor is going bad. Sometimes when I turn it on it doesn't make connection. It's got 1700 hours on it, so I'd just as soon replace it. But the way the builder wired it, he's has positive power from the battery going through the master switch to the small terminal on the...

Is there any curent litterature on the redisign material by Martin Hollman? How would I get that now?? Ive found a complete AA 2+2 and would like to check it for these changes! Thanks!

Has anyone been able to find the weight on the VW V10 diesel engine? This engine produces 550 lb/ft of torque at 2000 rpm and 310 hp at 3750 rpm. Sounds like a great candidate for aircraft to me. --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system...