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On 10/23/2020 10:13 AM, Stephen Izett stephen.izett@gmail.com wrote:
Hi Guys
I’m considering a prop change and wanting to confirm the flange type on the RD1-C
Does anyone know the type of flange? and do most Lycoming 360 series engines have that same bolt pattern and flange dimension?
Cheers
Steve Izett
Glasair SIISRG Renesis 4 port RD1-C
Tracy's flange in stock condition uses 3/8" dia bolts. The bushings (drive lugs) are 5/8" in diameter.
Most Lyc 360s I'm aware of use 1/2" bolts, and the bushings are 3/4" in diameter. Some Lyc 320s use 7/16" bolts with the same 5/8" bushing diameter; there may be some 360s using 7/16" bolts but I've never seen one.
I know that Mark S and Bobby modified their hubs to the larger bushings/bolts, to fit their MT electric props.
Bolt circle diameter is the same for all bolt sizes; 320s & 360s.
Charlie
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