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Author Topic: 1/2A Profile Sabre ready to fly,,,,  (Read 829 times)

Offline Paul Smith

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1/2A Profile Sabre ready to fly,,,,
« on: September 23, 2010, 09:28:27 AM »
"Ready to fly" as in I made it ready to fly in eight and a half days.

This is for the Toronto contest the day after tomorrow. I've always liked the Sabre since I saw them streaking the Lake Huron beach, just off shore enough to be legal, in the early 50's. This particular unit is the center piece of the Selfridge Air Museum.

The model came in a 9.9 ounces, about .4 oz above the preliminary estimate. This is basically a dustbin build, utilizing scraps from the chop.

« Last Edit: September 23, 2010, 09:47:53 AM by Paul Smith »
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Offline Tim Wescott

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Re: 1/2A Profile Sabre ready to fly,,,,
« Reply #1 on: September 23, 2010, 10:21:11 AM »
Has it flown yet?  You took less time to do more better than I would have, surely.
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Offline Paul Smith

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Re: 1/2A Profile Sabre ready to fly,,,,
« Reply #2 on: September 23, 2010, 10:30:14 AM »
The test flight and first contest is this Saturday, and don't call me surely.
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Paul Smith

Offline Glenn (Gravitywell) Reach

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Re: 1/2A Profile Sabre ready to fly,,,,
« Reply #3 on: September 23, 2010, 11:49:44 AM »
If you wouldn't mind, I would love to see a close-up pic of your bellcrank system.  Very pretty little bird. H^^
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Offline John Rist

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Re: 1/2A Profile Sabre ready to fly,,,,
« Reply #4 on: September 23, 2010, 12:50:06 PM »
I love the landing gear struts!!  #^
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Offline Paul Smith

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Re: 1/2A Profile Sabre ready to fly,,,,
« Reply #5 on: September 23, 2010, 01:20:10 PM »
Quote from: Gravitywell on September 23, 2010, 11:49:44 AM
If you wouldn't mind, I would love to see a close-up pic of your bellcrank system.  Very pretty little bird. H^^

The bellcrank is pretty simple.  Just a piece of circuit board with two output holes instead of one.  It has a couple extra laminations of the same material at the center to hold a brass bushing.  The axle is 1/16" piano wire.

I have been flying a 40-size airplane with this setup (and a 1/8" axle) for almost two years now and no problem to date. 
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Paul Smith

Offline Paul Smith

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Re: 1/2A Profile Sabre ready to fly,,,,
« Reply #6 on: September 27, 2010, 06:46:07 AM »
It went well and "won" the contest, which was delayed due to Hurricane Igor.  Unfortuately, nobody else showed up on Sunday, so it wasn't much of a contest.  My competition would have been significant on Saturday, but with steady winds at 30 and gusts to 50, nothing flew.  Newfoundland got trashed a lot worse than New Orleans, but Toronto just got a dry two-day blowout.  I don't know where the Tim Horton's cups and wrappers went, but it must be 700 kilos away.
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Paul Smith

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