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Richard Schubert

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Posts posted by Richard Schubert

  1. I have a copy I purchased at Oshkosh this year. I found it impossible to order it online at the time, maybe the site is fixed now. I am not an airplane designer so I can't say how useful it would be in designing a real aircraft. It is fun to play with, although maybe not $200 worth of fun. I rate it a 3 out of five. :banana::banana::banana:

  2. This one was posted on Barnstormers a while ago but the link is now gone. Here is the information:

     

    E-RACER PROJECT • $19950 • FOR SALE BY BUILDER • E-Racer w/o engine. ... Contact Robert A. Peck, Owner - located Dayton, NV USA • Telephone: *502*-*418*-*9333*

    The plane was apparently complete and flying with a franklin engine but was being sold without engine.

     

    BTW I should have mine flying by spring also :o

  3. Known Problems:

     

     

     

    Alcohol attacks some seal materials and varnishes on cork floats of fuel level indicators. This could cause leakage of seals and release particles of varnish from floats, causing blocked screens in fuel lines or blocked carburetor jets. Excessive entrained water carried by alcohol could lead to fuel lines blockage or blockage at screens or valves when operating at low ambient temperatures at ground level or at high altitude. Fuel volatility is also increased with the addition of alcohol in a manner that is not detected by the Reid Vapor Pressure test which is used to determine if a fuel meets the automotive specification. For example, a gasoline with alcohol will meet the Reid Vapor Pressure limit of 13.5 psi but it will behave as though it has a volatility of roughly 20 psi. Gasoline's with alcohol will also phase separate. Phase separation occurs as the gasoline/alcohol blend cools, such as when a plane climbs to a higher altitude. When water that is absorbed in the fuel by the alcohol comes out of solution, it takes most of the alcohol with it. The quantity that comes out of solution cannot be handled by the sediment bowl and tank sumps. Furthermore, if the alcohol is used to raise the octane of the base gasoline, the gasoline that remains will not have sufficient octane to prevent detonation.

  4. tonyslongez wrote:

     

    the reason I got this Berkut so cheap from Walt Sally became very obvious after unpacking. The work he performed on this airplane is so bad that I can't use the canard at all. He cut into the hinges with some sorta device not sure with what but they definately can't be used. The layup on the canard is so bad there are huge bubbles along the top of the spar cap how he did that I have no idea but I can say definatively my a$$ is not flying with that canard.

    ? :yikes:?

  5. When I originally saw this plane advertised it was out of my price range, so I posted a little message about it in the for sale section for the benefit of the forum members. After eracerchris backed out I decided to give the owner a call. To make a long story short, we came to a mutually agreeable deal and I flew out to LAX from Pittsburgh PA on March 1st to pick it up. We spent about 7 hours going through the plane, disassembling it , and loading it onto the truck and trailer. We did the paperwork at a local Jack-in-the-Box and I crashed at the nearest motel. The next day(Sunday) I meet Lynn Erickson back at the airport to get a look at his Evolution-eze, which has some similarities to the E-racer. That’s kind of like saying that a Porsche is similar to a VW beetle..:envy: His plane is a textbook example of how to build it right. If you get a chance, head out to Chino and take a look at it. Buy Lynn some lunch while you're at it:o . Just watch out for the scooter gang at Flo's!!

    I headed down the road about 2:00 pm and headed toward the mountains. The truck was moving around a lot and I was puzzled because the wind had been calm at Chino. Then I saw a big dust cloud up ahead. The truck moved a little more energetically. Then I saw a sign saying that high profile vehicles were not recommended. Then I saw the 18 wheeler laying on its side on the shoulder. :yikes: Then I took the next exit. I got a little education about the Santa Ana winds, which were blowing about 60-70 MPH in the passes. While I was waiting, I was interviewed for the evening news, along with the other refugees waiting there. I ended up sleeping in the truck until the next day at noon when the wind subsided enough to leave.

    After that it was smooth sailing down I-40, although I noticed that when I stopped in Texas, the place I had stayed at the night before in Arizona had 4 inches of snow. Then when I stopped in Arkansas, Texas had 6 inches. By the time I stopped in Cincinnati, Arkansas had 12 inches. There was some snow between Cincinnati and Columbus, Ohio, and rain the rest of the way home. Columbus ended getting 2 FEET of snow.

    The plane traveled well, with absolutely no damage. Even though I was a foot over the width limit, no troopers gave me a second glance. I went through Memphis instead of St. Louis to avoid tolls and snow. I only drove during daylight hours. The truck got about 11-12 miles per gallon. The final tally was 2651 miles and 41 hours driving time. Sitting here now writing this, it seems quit surreal, except for the keys in my pocket.:banana::banana:

     

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    post-115-141090159955_thumb.jpg

  6. Well, dynamic pressure is equal to 1/2 * the density of the fluid * the velocity squared.

    Lets say 150 mph(thats indicated) 150*5280/3600= 220fps

    Density of air = 0.002377 lbs/cuft (approx.:) )

    so (0.002337)(220)(220)= 113lbs/sqft of pressure

    divide by 144 for sqin =0.786 lbs/sqin

    atmospheric pressure = 29.92 in mercury or 14.7lbs/sqin

    2.03 in mercury/1psi

    0.786*2.03= 1.6" max theoretical pressure gain

    YMMV

    "Just finished a fluids course and I couldn't resist":D

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