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I was turbocharged and racing at Reno. I had about 800 hrs on the flex plate at the time. However, the flexplate was never intended to transmit the engine torque and it will eventually fail even with the loads transmitted by a stock engine. There have been several examples of cracks appearing in stock engines.
Dave Leonard Turbo Rotary RV-6 N4VY
Dave, were you running a stock 13B did you P/P it or any power increasing additions (or subtractions)?
Thanks
Rich
In a message dated 12/6/2020 12:41:30 PM Central Standard Time, flyrotary@lancaironline.net writes:
Steve, you are right. The Issue is cracking og the auto-tranny flex plate. Mine failed entirely. I highly recommend making the change sooner rather than later.
Dave Leonard
Hi Charlie
I thought people moved to the race flywheels because the flex plates were cracking.
I hadn’t heard of the Engine/Drive/Prop needing a flywheel mass.
I found some info on the forum archive but nothing to draw it all together.
I’ll have a good look at the flexplate when I pull the drive and check for cracking, but unless I hear otherwise I plan to reuse the flex plate.
Thanks
Steve
> On 6 Dec 2020, at 8:58 am, Charlie England ceengland7@gmail.com <flyrotary@lancaironline.net> wrote:
>
> On 12/5/2020 6:35 PM, Stephen Izett stephen.izett@gmail.com wrote:
>> Hi team
>>
>> Having completed phase #1 testing of the Glasair Super IIRG power by Renesis and RD1-C redrive, I’re going to pull the redrive for its 25 hourly initial inspection.
>>
>> Tracy deleted the damper assembly from the last rendition of his design and I’m considering removing ours by creating a new adapter plate from the existing splined
>> part that is currently riveted to the damper and adding some longer bolts and spacers.
>>
>> Has anyone heard anything further in regard to RD receives with the damper removed?
>> Has Tracy given any further updatess?
>> All I have read was after initial tests some years ago.
>>
>> Cheers
>>
>> Steve.
> Best I remember is that you need either an aluminum or steel racing flywheel, to get more mass on the engine side of the system. IIRC, it's also limited to low mass (wood, etc) propellers. The ones he sold had a different input shaft, but I think Dave Leonard modified his RD1-C & to use a steel racing flywheel which was only slightly heavier than the aluminum version. Search for Dave's posts, if he doesn't chime in. I've been wondering if Guibo/Rototflex couplers could be a viable alternative to the aluminum plate/rubber discs. Probably would weigh more, and definitely cost more.
>
> Charlie
I've got a flexplate from a salvage yard that is cracked (never flown). On the other hand, I think Tracy had over a thousand hours on his without cracking, before switching to the RD2. Here's an archived RWS page from the Wayback Machine: https://web.archive.org/web/20121230061959/http://www.rotaryaviation.com/RD-2C.htmand https://web.archive.org/web/20121230065615/http://www.rotaryaviation.com/faq's.htmCharlie
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