All the best Mark. Glad to hear you are OK.
I know just how you feel.
Sounds like similar damage as mine had.
They are a mighty aircraft, and easy to repair.
It will be interesting to see your next engine design.
Phil Matheson
Given that this engine has become such a popular powerplant for experimentals,
I would have thought someone would be building a forged crank for this motor by
now since it is the "heart" of any engine.
Forged cranks ended the crankshaft failures with the VW's so looks like this is
going to be
Also remember a belted gear reduction will take the loads and not the crank,
the engine can the produce the RPM it was designed to, and produce the HP it
is said to.
You can also run a larger prop or more pitch or both.
Phil Matheson
KR2
Has anyone ever considered the quality of the line bore in the case and the
tolorance of the main bearings? I would think that a very good fit on the main
bearing journals would help keep the crank from flexing as much. Some people
may put in a crank and bearings and as long as it turns it is O
Chris,
I hope you are going to make the KR Gathering this year.
See N64KR at http://KRBuilder.org - Then click on the pics
See you at the 2012 - KR Gathering in Mt. Vernon, Il MVN 40th
Anniversary
There is a time for building and it is almost over.
Daniel R. Heath - Lexington, SC
-Ori
I would not be so quick to jump to conclusions. There are many things that
could have played a part in this and no one will know without running a
complete analysis on the damage. And, then, we may still never know. The
front bearing is a definite improvement and I would not fly a Corvair engine
How about a Single rotor Rotary ~100 Hp, Virg
On 12/27/2011 5:19 PM, cgardn628 wrote:
> Mark,
>
> Glad to hear you are okay after the scary #3 crankshaft incident!
>
> Maybe you'll reconsider the Type 4 VW that you were originally going to use
> in your KR2S.
>
> I also had a
Running a type 4 VW with a direct drive prop at the 'right' end (from a car
perspective) is considered by many (and proven by some) to be a recipe for
disaster, however that's considered the correct end for a PSRU. So to
answer the question, the aircraft equivalent of the auto transmission (in
ter
What does the damage (as I understand it) is not the rotational forces but
the bending force the propeller imposes along the axis of the crank. These
bending loads are practically non existent in an automotive application and
I'm not sure a flywheel of any weight would make much difference.
The p
Mark,
Glad to hear you are okay after the scary #3 crankshaft incident!
Maybe you'll reconsider the Type 4 VW that you were originally going to use
in your KR2S.
I also had a broken pushrod this year in my 2180 VW due a faulty end cap
shattering in flight. Flying on 3 cylinders can be intere
Thank you all for your responses. I'll look at that video and research
further into alodine for the aluminum.
-Seth
On 12/26/2011 8:45 PM, smwood wrote:
> For aluminum protection: Watch the EAA Hints for Homebuilders video and do
> what Brian Carpenter says. It works!
> http://www.eaavideo.org
Dave, It is possible. There are already some devices supporting Wifi. Take a
look at http://www.aviation.levil.com/AHRS_mini.htmI would think this device
would work great for streaming the data needed. Derek -- Original
Message --
From: Prototype Mech
To: KRnet
Subject: KR> H
Good article. The L-98 Corvette engine (and LT-1) when coupled to the
6-speed tranny also use a dual mass flywheel, for exactly that same reason.
When switched to an aluminum flywheel- same results. Another thing too- when
the clutch disc with spring dampeners are changed to one without the
springs
maybe I should have asked 'gaining some weight and a safety margin isnt such
a bad idea?' Vaughan Thomas
Hamilton. New Zealand
- Original Message -
From: "Vaughan Thomas"
To: "KRnet"
Sent: Tuesday, December 27, 2011 11:35 PM
Subject: Re: KR> Fwd: Cranks and flywheels
I,m watching the
Might be helpful:
http://www.flat6innovations.com/broken-crank
--
Glenn Martin,
KR2 N1333A,
Biloxi, MS
Here is a photo taken by Bernie Wunder of my KR-2, newly arrived at St.
Mary's County Airport 2W6, for the FAA airworthiness inspection application.
The graphics were produced by Wayne's Signs.
http://waynessigns.com/gallery/index.php?page=1&ptype=VehicleLettering
Fixing mechanical fuel pump prob
Clear thinking, nice landing, ML! Glad you're okay.
Paul
KR2s almost
I,m watching the discussion re corvair engine & broken crankshafts with
interest. (I'd like to get a couple of suitable engines having purchased
WW's conversion manual - but the engines dont exist down here in NZ). It
seems Glen martin might be ontoit as to the flywheel thing, can a prop
achiev
Original Message
Subject:Cranks and flywheels
List-Post: krnet@list.krnet.org
Date: Tue, 27 Dec 2011 02:16:14 -0600
From: Glenn Martin
To: KRnet
On 12/26/2011 9:56 PM, Tony King wrote:
> One significant factor, regardless of which end it's being driven from
On 12/26/2011 9:56 PM, Tony King wrote:
> One significant factor, regardless of which end it's being driven from, is
> that the torsional loads imposed on the crank in an automotive application
> are vastly smaller than those imposed by a propellor spinning at 3000 rpm.
On a theoretical note: Isn't
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