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Old 10-25-2009 | 08:11 PM
  #306  
Matt Chapman
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Joined: Dec 2002
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From: Avondale , PA
Default RE: Another Skymaster Viper

Another Viper takes it's first flight today!
What a day. I did the maiden flight on my Viper today. It went really well. I used the factory control throws and added a few degrees. Too much for low rates. The CG was balanced to the aft limit, so I may also have been on the tail heavy side... the faster the plane flew the more it wanted to pitch up. I'm going to do a new CG balance to the forward limit and fly it that way until I'm all trimmed out and comfortable. The down elevator trim had the trailing edge of the elevators down about 3/16 of an inch from neutral. The roll trim required was due to the right flap being a fraction "high' in the up position. Easy stuff to fix.
The plane is a floater. Good landing, just long waiting for it to slow down.
No second flight as it was getting late in the day and I wanted to make the changes before next flight. P-160, 8 1/2 minute flight at 1/2 throttle most of the time and we landed with 2/3 of a tank in the lower tank.
One issue im still wondering about: Using Futaba 2.4 and the Air Power EVSD-5U-PRO-ST . When i turn the radio on the first time, the gear cycles up, then down once. Shut the radio off after that an turn it back on... it works ok. More anoying than anything, but any thoughts?
Now that first flight is behind me... now I get to learn the jet for real. I'll get some pix posted and keep you all up to date with my experiance.
Thank to Dave & Pete M. here in PA for all the help and test flight with my first jet. (and based on today... not my last)

More to come!

Matt Chapman