|07-30-2004, 09:10 PM||#1|
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Join Date: Jun 2004
Location: Sudbury, Ontario Canada
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Bob Parkinson's Avro Arrow Kit
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I just purchased the Avro Arrow Mark IV Kit (DF) from Craig Knight this afternoon. It's one of Bob Parkinson's models, and should be a blast to fly once it's complete. I was just wondering if anyone else here has experience with this particular kit (it seems like one of his originals but that's no biggie), through building and flying.
Whether it be certain building tips or general flying tips for this particular model I just want more information than what's supplied in the instructions. I currently fly the GP Patriot and I love it. I'm not a 3D type of person, so go fast, turn left suits me. While I'm still tentative with that model, and it's not really a scale model, this will be my first real venture into a scale model of a real plane.
When this is complete, which should be ready for the springtime, I'll be confident of my abilities with speed, and should be zipping around the field in no-time..
so, if anyone has experience with this particular kit, whether it be good or bad, could you please let me know?
|08-07-2004, 05:00 PM||#2|
I am: Boolean21
Join Date: Sep 2002
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Parkinson Arrow == Pregnant guppy
Bob's design dates back to the early 1980's (probably 1982 as I was working with Frank Anderson at the Burlington 11+1 show that featured Bob's prototype flying at the noon-hour show). That was using the then new OS.60DF engine.
Design reflects typical Byroblaster design -- big fuselage to take the fan unit, big cheat hole to help with low-speed airflow, no ducting except for a thrust tube, and used standard servoes.
From a pure scale stance, it sucked -- fueslage ratio is closer to 1:1 than the 1:2 of the original, single-wheel mains and nose, spindly gear. Also, the original's landing gear rotated and shortened during retraction to fit between the inner wing half. Probably the worst part of the Arrow design, totally Rube Goldberg engineering using a chain in the middle of the LG shafts with fixed end-points and a pivot block (the retraction motion pulled the chain which pulled up the lower half against springs and shocks, extension cycle relaxed chain and...)
However, as a good first jet, not bad.
Build it stock, just make sure that you're using good ball-bearing servoes and an OS.91.
Only real sticky-points with the design is that it's a delta.... speed bleeds off real fast in turns, and Bob lost his Arrow at the Burlington show into a neighbouring back yard when he got into a high-AoA, fully stalled situation. Not enough oomph from the engine to push the plane out of the deep stall condition, and not enough airflow over the flight surfaces to get the nose back down.
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