I use a gates multi-v and bought another this year (same part number) to change it out this year. But the new one is at least 1cm longer than the old one, and would require a whole new alternator thension arm to take up the slack. So the old one is still there because I don't have time for the extra work. My guess is that they run in batches and on batch may be very different from the others..
On Thu, Sep 23, 2010 at 9:47 PM, Al Gietzen <ALVentures@cox.net> wrote:
My first dual belts were from two different manufacturers, and were very closely matched. Worked fine for 100 hours; then I changed them ‘just because’. I bought two Gates of the same part number, and they were excellent match. They have about 100 hours and still look good. I’ll run these longer.
Al
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Alternator v-belts
ED & other dual Gates belts users ( including myself ) at our last chapter fly-in two gyro planes came in & the owner/designer/builder was telling Greg & I about a company that makes heavy-duty "matched " v-belts for his gyro drive sys., point is they are matched, one of our belts is stretching differently than the other ( one is loose other is tight ). Greg is going to purchase a couple of belts for our 13B stock 70A Mazda Alt. with under-drive dual v-belt sys., will let you know as soon as we know. David R. Cook RV6A Rotary last rivets now installed ( Data plt. ) slapped in the face by the economy so moving very slow.
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