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Old 05-19-2008, 05:54 PM   #5
bodywerks
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Join Date: Jan 2006
Location: Tucson
Age: 35
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Default Re: H9 35% Extra 260 w/DA 85

Quote: Originally Posted by walkerk122
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I was flip-floping back and forth DA 100 vs DA 85 until I saw QQ's Python with the 85/Greeves this past week at the Nall...no shortage of power (understatement!!)and it spooled up so stink'n fast! To avoid flip-flopping any longer I marched over to the DA booth and bought an 85!!

Anyway, does anyone have any experience with the 85 on the H9 260's? I'm either going to go with a KS 95 (sitting in the shop) or a Greeves (backordered from DA until the end of the month). My only major concern is balance!
your only major concern is properly mounting it! You cannot use standoffs on the DA-85 - it will void the warranty. With the H9 260, the engine is spaced out so dang far, too, so making a mounting block out of solid ply would add a lot of weight. I have had good luck with end-grain balsa blocks, capped with two sheets of 1/32" ply(compression-glued), on engines up to 150cc - it may be an option.
Given how far out this setup is, though, I would consider making a sort of pyramid with the top chopped off out of the end-grain balsa, cap the front as mentioned before, then glass the whole thing with 3/4oz glass (except the back part - you'll need to glue the assembly to the existing firewall). Weight gain would be minimal, strength would be phenominal.
Attached Images
File Type: jpg mountweight1.jpg (167.9 KB, 52 views)
File Type: jpg 85 safeties.jpg (189.7 KB, 66 views)
File Type: jpg 42260engine1.jpg (190.9 KB, 62 views)
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