Don
My kids are using half rubber. Other half is balsa stick, 1/8 square, with 0.020 wire hold at both ends. A little clay in the middle to get the weight.
Times and altitude are nearly exactly half, to the second. Last year we tested near nationals in a 20 foot gym, got it dials to 15 feet. At the event with full rubber they put it within inches of the 30 foot girders.
The torque is the same, just lasts half as long. Wind to same peak torque, unwind to same launch torque.
If using o rings, the assembled rubber will be slightly heavier than half the full assembly, and the stick slightly less. Rubber mass may be slightly over half, to account for the knot.
I use a 0.001g scale about $15 on Amazon. Look up gram scale. American weigh, it something like that. Glued a 5/32 od brass tube socket to the platform. Then about an 8" carbon rod plugs into that. About a 1.5" cube of poly foam glued to the top, with a slit, nicely clamps the plane or rubber.
Careful weighing fresh cut rubber. Static can throw off the weight substantially
Chuck
Sent from my ALCATEL ONETOUCH PIXI 3 (4.5)
On Jan 20, 2017 8:44 AM, "dweigt47_at_gmail.com [Indoor_Construction]" <Indoor_Construction_at_yahoogroups.com> wrote:
Fred, thank you for confirming most of these models fly left throughout their flights. Half winds to avoid hanging the model in the rafters makes lots of sense. It's easy, and probably what we'll do Sunday. It does mean we won't know how it will fly for the first half of the turns when fully wound, as it won't have as much torque and power.
Don
Received on Fri Jan 20 2017 - 11:21:53 CET
This archive was generated by Yannick on Sat Dec 14 2019 - 19:13:48 CET