Bill,
As you can see from the numbers they are within about 0.004 of each other...........All are
4140 forgings..............All are adaptable for use as a replacement for the Mazda flexplate
as Dave Leonard has done for his Turbo 13B powered RV6 which at last report had about
10 hours on the flywheel ("ACT Prolite") that ended up at less than 9 lbs after additional
machine work to adapt...........Dave is known for giving his engine and a/c a workout and is
headed to the air races at Reno to race in the sportsman class this next week.........
Kelly Troyer
"DYKE DELTA JD2" (Eventually)
"13B ROTARY"_ Engine
"RWS"_RD1C/EC2/EM2
"MISTRAL"_Backplate/Oil Manifold
"TURBONETICS"_TO4E50 Turbo
From: Bill Bradburry <bbradburry@bellsouth.net>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Sent: Sunday, September 11, 2011 3:55 PM
Subject: [FlyRotary] Re: Flywheel thickness ?
Is there a significant difference in the measurements of these two flywheels? Can they be considered to be the same for our purposes?
Bill B
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Kelly Troyer
Sent: Sunday, September 11, 2011 12:10 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Flywheel thickness ?
Here are the measurements of both the "ACT" and "F1" chrome-moly steel
flywheels that I have..........All measurements are from the mounting face of the
rear counterweight..........
"F1" Flywheel (11.8 lbs before any additional machine work for lightening)
(1) From counterweight to clutch disk surface 1.115 in (28.321 mm)
(2) From cter-wt to pressure plate/ring gear surface 1.100 in (27.940 mm)
(3) Flywheel thickness minus clutch disk surface 1.100 in (27.940 mm)
"ACT" Flywheels (Street-Lite 13.8 lbs/Pro-Lite 9.8 lbs before any additional machine work for lightening)
(1) From counterweight to clutch disk surface 1.111 in (28.219 mm)
(2) From cter-wt to pressure plate/ring gear surface 1.096 in (27.838 mm)
(3) Flywheel thickness minus clutch disk surface 1.096 in (27.838 mm)
Kelly Troyer
"DYKE DELTA JD2" (Eventually)
"13B ROTARY"_ Engine
"RWS"_RD1C/EC2/EM2
"MISTRAL"_Backplate/Oil Manifold
"TURBONETICS"_TO4E50 Turbo
From: Kelly Troyer <keltro@att.net>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Sent: Thursday, September 8, 2011 6:48 PM
Subject: [FlyRotary] Re: Flywheel thickness ?
I will get the steel fly-wheel measurements and get back to you..............
Kelly Troyer
"DYKE DELTA JD2" (Eventually)
"13B ROTARY"_ Engine
"RWS"_RD1C/EC2/EM2
"MISTRAL"_Backplate/Oil Manifold
"TURBONETICS"_TO4E50 Turbo
From: Tracy <rwstracy@gmail.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Sent: Thursday, September 8, 2011 3:20 PM
Subject: [FlyRotary] Flywheel thickness ?
Question for David, Kelly or anyone else playing with lightweight flywheels. I have one on the way but won't see it until I get back home in October. I'm working on a new design to replace the stock flex plate and need to know the
thickness of the lightweight flywheel. Every picture I see of them appears to show an almost flat disk which would imply that there is MORE room between it and the redrive adapter plate than there is for the flex plate which has about a 1 1/4" dish in it. BUT, much of the discussion seems to imply that if anything, there is LESS.
Anyone able to tell me the actual thickness of these aftermarket lightweight flywheels?
I'm looking at the aluminum versions for weight reasons and also because the iron friction surface is removable ( for even less weight).
Tracy
Sent from my iPad
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