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Old Mar 14, 2005, 05:56 PM
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Kestrel Autogyro


Has anyone built one of these models, a free plan from RCME in 2003 ?
If you have and it flys, would you be able to help me clear up some details which aren't clear on the plan or in the magazine article.
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Old Mar 14, 2005, 10:53 PM
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AND FOR MY NEXT TRICK....!
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Have you checked out this........
http://www.autogyro.com/models/bishop/kestrel.htm
Old Mar 15, 2005, 04:34 PM
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That plan on ebay is an old controline plan. Interesting though.

Scientific had a 1/2A controline gyro years ago. Saw one fly at Florida gyro meet last year. Wing was pretty big so I am not sure if the blades contributed much lift or just went along for the ride. Fun to watch.
Old Mar 15, 2005, 04:45 PM
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Sorry guys,
My response above was intended for the "more autogyro video" thread.

About the Kestrel, it looks a lot like Dave Boddington's 'Gyrace' to me.
Old Mar 15, 2005, 04:55 PM
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Thanks, Jodini, I read that article with interest and maybe it confirmed a suspiction

On the plan, the C of G is given as almost under the leading edge, while the text in the magazine article gives it as 1 3/4 inches back from the L.E, just about under the main spar! If he built his without the article and balanced it as per plan, it would be rather nose heavy and sluggish to respond

I have decided to modify the rotor bearings from those given in the plan by using model car bearings for the top bearing, and plain plastic car bearings for the lower set. I intend to power it with a PAW 35 diesel, as the fuel economy will be much greater thereby saving 3 or 4 ounces in the weight of the fuel. ( I like diesels)

The model as standard looks "bare" without a cowl, I will see how the motor sits on the mount before I can decide on the cowl, although the tail wheel as shown could be a good hidden counter balance the weight for the cowl
Old Mar 16, 2005, 10:01 AM
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You could just take an old 1/2a cox engine...take out the piston, off the back plate and bolt it down. An easy rotor head!
Old Mar 16, 2005, 01:28 PM
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them little cox motors are worth money here in the UK , I'll stick with car bearings at 2.50 each (reckon thats still a rip-off)
Old Mar 16, 2005, 01:30 PM
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I built a gyrace some years ago and it flew pretty well until the brass bush bearing siezed in flight and the rotor stopped
Old Mar 16, 2005, 01:34 PM
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since then I have had the work/wife/children illness
Old Apr 15, 2005, 02:56 AM
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a leap forward


Luck was on my side yesterday....I was driving past a closed down model shop yesterday, I spotted the owners clearing out thier stock and picked up 2 new in the box PAW 35 r/c motors including 7 tins of D1000 for 80
to follow on from that, I called in at the local bearing shop, who sold me 4 beautiful sealed stainless steel flanged instrument bearings as "obsolete" stock (4mm X 10 X 5). the rotors should rotate just by looking at them
Old Apr 17, 2005, 07:28 AM
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ahhh, kicking myself over the bearings now, I pulled the spindle motor out of a dead hard drive and it has 2 beautiful sealed instrument bearings 5 X 13 X 4 mm
Old Feb 08, 2006, 04:01 PM
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How did the Kestrel end up AndrewB? One of my mates is about halfway through building one as well, but blown up to .46 size.
Old Feb 11, 2006, 07:14 PM
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I haven't had chance to try it, my "flying field" (swamp?) floods during the winter and its been too cold. Hopefully will have a chance over the next few weeks.
Old Feb 11, 2006, 10:38 PM
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I have a used Kestrel here, I got at a swap meet recently. It was flown with a glow engine, but I intend to electrifly it. The previous owner told me to balance it at about the LE of the "wing" so that goes along with what you said about the cg earlier, Andrew. I am waiting for a motor to come in that should work pretty well on this...should be interesting if nothing else!!

David
Old Feb 12, 2006, 08:30 AM
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Electrify My kestrel has a PAW 35 diesel swinging a 12 X 6 " master airscrew @ 8500 rpm on "straight" fuel.

I have a copy of the plans and the magazine article if you need them. The CG on the plan is 3/4" before the LE and mine wieghs in lightly at 3lb 8 oz.
Last edited by andrew b; Feb 12, 2006 at 08:48 AM.


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