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Mar 31, 2010, 10:48 AM
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Quote:
Originally Posted by bosco49
.....Sooooo a CG around 87 would work?.
I would not maiden the plane with the CG that far back. Looks like you will need a bit more weight up front (maybe some thin lead placed under the motor itself??). If you can get the CG to around 84 mm, you would probably be good to go with the maiden flight.

By the way, I would be interested to learn how the Mega 20/30/3 works-out. I had considered that motor for my HA.

FF
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Mar 31, 2010, 11:00 AM
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bosco49's Avatar
Forest the Mega 20/30/3 wanted to pull the High Aspect right out of my hands pointing straight up....that with a 13x8 prop
Apr 01, 2010, 09:28 AM
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bosco49's Avatar
Its looks like 5mm on the back side of the CG is ok....I have been thinking about putting some big holes in the horizontal stabilizer and as you can see ever thing is up front.
Apr 01, 2010, 12:44 PM
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Andy W's Avatar
Put a couple of steel fender washers between the retaining nut and yoke.
..a
Apr 01, 2010, 01:17 PM
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Quote:
Originally Posted by bosco49
....I have been thinking about putting some big holes in the horizontal stabilizer and as you can see ever thing is up front.
That might work, but why not try it with the extra weight in the nose. You may very well like the way that it performs, even if it is a bit heavier. Putting holes in the h-stab is always an option for later.
Apr 01, 2010, 04:14 PM
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Scott

I agree with Forest Flyer. Determine how much additional weight you need on the nose (over motor) to get a middle of range CG. Then make up three or four smaller pieces with that same total weight and tape them on the outside of the nose. Fly it and then see what happens if you remove one, then two, etc. You should be able to determine when you are at the max rear CG BEFORE it becomes hard to control. Then tape/glue shot or whatever in the nose.

Would hate to see holes in that stab.

Good luck.

Wayne
Apr 01, 2010, 08:46 PM
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Andy W's Avatar
I asked him how much weight was needed before he switched motors, but he seemed to ignore that question.
..a
Apr 01, 2010, 09:18 PM
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Well by moving the receiver pack up front ...I got it to balance right at the 82mm CG.Andy I don't know how much weight was needed before I switched motors...about 58grams...up front? Wayne it look like I will be coming down when the weather gets nice.
Apr 02, 2010, 09:36 AM
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Scott,

Looking forward to seeing both versions of the E HA fly. PM me a day or two before you want to come down.

We may have another 'glider guider', one of my students soloed his Radian last week.

Wayne
Apr 02, 2010, 10:54 AM
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bosco49's Avatar
Sound good Wayne...now I'm looking for someone with a fish scale so I can see what the weight is.

Scott
Apr 02, 2010, 12:59 PM
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Before my wife gave me my scale, I would take components (motor, battery, etc) to the Post Office and use their scale (self service). Never questioned, but was always prepared to say I was checking weight in preparation to packaging and shipping.

Watch out for fishing scales, they ALWAYS read high!
Apr 02, 2010, 06:19 PM
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bosco49's Avatar
..........mmmmmmmmmm.........now that smells fishy........lol


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