Re: Rubber testing: Chiming In

From: Don DeLoach <ddeloach_at_comcast.net>
Date: Thu, 8 Nov 2012 12:50:13 -0700

The lube of choice in F1G and F1B these days is pure silicone oil, 12,500cst

Don DeLoach

Sent from my iPhone

On Nov 8, 2012, at 12:40 PM, "John Berryman" <wordguy1950_at_yahoo.com> wrote:

> Don’t know how many other cheapskates there are out there, but I’d be interested in seeing a comparison of “real” rubber lube to some of the “just as good – no kidding” materials that I hear about from time to time, e.g.,. Armorall and its various clones, etc.
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> I used to fly OD FF with a wake flyer who did a lot of testing so I have the sense that you’re embarking on quite a journey and may find that a study of alternate lubes may simply insert too many variables into the equation given the amount of time you have available to you.
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> From: Indoor_Construction_at_yahoogroups.com [mailto:Indoor_Construction_at_yahoogroups.com] On Behalf Of mkirda_at_sbcglobal.net
> Sent: Thursday, November 08, 2012 12:31 PM
> To: Indoor_Construction_at_yahoogroups.com
> Subject: [Indoor_Construction] Rubber testing
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> Greetings.
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> It was suggested to me that I produce torque curves for the various batches of rubber I have available to me.
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> I am not really finding anything to guide me on doing this. Making this up as I type...
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> I assume that I should standardize on a given loop size and cross-section. I'll likely use something similar to F1D motors, so .6 grams, ~0.053" width. Make up several of each rubber type.
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> Use the digital torque meter and a bracket for the winder so the rubber length is consistent. 10" from hook to hook is about correct.
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> Stretch 5x for 5 minutes, let relax a bit, then wind to breakage for max torque and turns.
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> Wind to 70%, let sit for a couple minutes, then back off and rest for ten minutes.
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> Wind to .5 oz/in or so(90%?), then back off 30 turns and record the torque measurements.
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> I currently use the FAI Sil-slick lube. Should I try others?
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> Regards.
> Mike Kirda
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Received on Thu Nov 08 2012 - 13:12:29 CET