2.17 here.
On 12/26/2010 3:01 PM, Kelly Troyer wrote:

Chris and John,

         Do both of you have the same ratio PSRU ??.................Most pushers use the

2.17 to 1 gearbox because of prop clearance issues as I recall...............
 

Kelly Troyer
"DYKE DELTA JD2" (Eventually)

"13B ROTARY"_ Engine
"RWS"_RD1C/EC2/EM2
"MISTRAL"_Backplate/Oil Manifold

"TURBONETICS"_TO4E50 Turbo

---

From: John Slade <jslade@canardaviation.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Sent: Sat, December 25, 2010 7:24:50 PM
Subject: [FlyRotary] Re: Chris - Update needed

>just a hair over 6300 rpm static at about 34 map
Holy crap! Is that a 3 blade 68" IVO Magnum prop? At 34 MAP I only get about 4700. I need 44 map to get 5600.
If our props are the same then either something is wrong / different - map / rpm reading or prop pitch setting -  or your engine is developing a LOT more power than mine?

Better check that you're getting a significant rpm drop on the high pitch setting.
Regards (and merry Christmas to all)
John




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