This problem is solved by sizing motors by weight and length as many of us do. I still will list the width on my envelopes as a reference point but it's weight and length that are most important to me.
This is a lot easier in classes that have rubber weight limits because there is one less variable to consider. When I'm flying F1M in Cat IV for instance I might be looking for a 15 1/2" motor. If I have one that's 14 1/2" I know that I probably won't be able to get in enough turns to do a decent time and a 16" motor will probably land with too many turns left.
I've even found that once the right length motor is determined it usually will be about right with any of my good rubber - 5/99, 3/02 or 2/99 in a pinch.
----- Original Message -----
From: dgbj_at_aol.com
To: Indoor_Construction_at_yahoogroups.com
Sent: Sunday, November 19, 2006 3:55 PM
Subject: Re: [Indoor_Construction] 2/99
"One cannot reliably generalize because different samples of the same batch
vary significantly."
Not only do the physical properties vary, but the strip thickness varies,
possibly more. Yet I rarely see strip thickness mentioned. When I see reports
of rubber delivering more turns, but lower torque, or more torque, but fewer
turns than expected, I suspect the difference is due to strip thickness.
Measure both width and thickness and compare rubber on a cross sectional basis.
Adjust width or strand numbers as needed to get comparable results.
Gary Hinze
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[Non-text portions of this message have been removed]
Received on Sun Nov 19 2006 - 14:45:40 CET
This archive was generated by Yannick on Sat Dec 14 2019 - 19:13:44 CET