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Coach Chuck,

Thanks for the kind words. I had great students, teachers and parent volunteers working with me.

You're doing great science with your students too. Time to retire so there’s more time for SO.

Brian T

The teams I coached this year at Michigan States: Raw times: 1st - Haslett HS 3:35.3 2nd - Holt HS 3:33.5 3rd - East Lansing HS 3:10.8 5th - Okemos HS 3:08.3 All bonuses were obtained on top of these times. Ceiling Height 21 ft and a few inches, flat ceiling tile, old gym with no air circulation iss...

Yes, I'm in full agreement, static stability first, fly and observe, then determine if and how much washin might be needed.

Jgri,

One more note on cracking LE to add washin; make partial cut through at a shallow angle relative to the spar lengthwise direction. The resulting scarf joint will be pretty strong.

Brian T

Jgri, Yes, most likely you need about 1/16" to 1/8" of left wing washin to prevent rolling to the floor during the initial high-power portion of the climb. Yes, partially cut through the left LE spar near the wing mid point and gently crack and hold about twice as much washing as you want ...

Here's a link with pictures of the pros travel boxes: http://www.hippocketaeronautics.com/hpa_forum/index.php?topic=4553.msg42032#msg42032 Of course, you don't need anything this elaborate, but this demonstrates the disassembly and packing. The clear plastic side "door" is to let TSA view ...

sciencegirl03, This is usually due to difference in humidity between the location where the heli was constructed and the competition location. It is better, usually, to build in low humidity and accept sagging when competing in higher humidity locations than to build in high humidity and have materi...

CMS, Sorry, when I was recommending breaking the dihedral joint and resetting, I was thinking that your warp problem was creating excess wing span. I should have understood the "10.1" was excessive wing chord. Jeff's idea is a good one to install a slightly shorter rib to pull the .020&quo...

Jgri, Did removing 6" from the tailboom and moving the clay ballast cause the CG to be about 1.75" - 1.875" forward of the wing TE? If so, after setting the wing incidence to about 1/4", and the other trim settings per my earlier post, and winding the rubber fully (and backing of...

Jgri, Good advice from Coach Chuck, as always. If you want to send me the weight of the ballast, I can enter it in the spreadsheet and recalculate. Working with rubber using mass per unit length is what all competition modelers do. It is really not possible to measure thickness of a rubber band and ...