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Old Jan 22, 2015, 04:34 PM
montaukmsc is offline
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Need CG for hobby king F86 90mm fiberglass

I finally got around to finishing the hobbyking F86 90mm fiberglass plane and would like to be sure of the CG I'm hoping those of you who have and flown it could give me some input to the measurement that best works. With the tiny elevators I don't want to be to nose heavy an run out of elevator. Another thing is I used the stock 5 blade change sun fan with the het Typhoon 650-68-2250 and with 6cells drawing 105amps its producing 7.3lbs of thrust the plane loaded weighs 6.75lbs so it should be great what pisses me off Is I also just built the HK viper version 2 and purchased the Extreme Rc jet fan/HET combo which is suppose to draw the same amps on 8s and produce 10lbs of thrust well it also only produced 7lbs. The only thing with the F86 is I have no front duct nothing would fit with that . But back to my original question on the cg?

Thanks
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Last edited by montaukmsc; Jan 23, 2015 at 11:14 AM.
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Old Jan 22, 2015, 05:35 PM
Larry Dudeck is offline
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My scratch built F86 had the balance point about 1" ahead of the TE at the root. I determined this by the use of a "chuck glider"
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Old Jan 23, 2015, 07:43 AM
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Thanks but im looking for someone that has the same plane to get a starting point
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Old Jan 23, 2015, 08:12 AM
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I also have an HET F 86 with a 36" wing span. The BP for that plane is 4" ahead of the TE, measured at the root.

If no one else has any comments, you might go on line and look for a balance point calculator. I used to have one but my PC but it crashed so I can't supply a URL.
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Old Jun 12, 2016, 01:24 PM
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I suggest building a bigger elevator the guy at our field couldn't get his to rotate at 2000 input watts 8 lbs flying weight
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