Buying prop strike engine

http://www.whiteindustries.com/

White Industries lists engines with flange runout. What does flange
runout tell about the engine?

It seems some prop strike engines have a larger flange runout reading
than others, and the larger the flange runout, the lower the price.
Why?

Thanks.

Flange runout means absolutely nothing. Especially on Lycomings.
Because of the meatllurgy involved they don't bend, they break.

wrote:
http://www.whiteindustries.com/

White Industries lists engines with flange runout. What does flange
runout tell about the engine?

It seems some prop strike engines have a larger flange runout reading
than others, and the larger the flange runout, the lower the price.
Why?

Thanks.

White Industries lists engines with flange runout. What does flange
runout tell about the engine?

It seems some prop strike engines have a larger flange runout reading
than others, and the larger the flange runout, the lower the price.
Why?


The higher the runout number, the more damage there is to either the
crank or the case. It depends on the exact engine series as to how bad
a number you can tolorate before the repair costs are closing in on
replacement costs.

For me, it's not worth dealing with an engine that has had a prop
strike unless one of two things are known:

1: The prop strike was with a wooden prop or

2: The case has already been through a complete inspection and the shop
is able to guarantee that the case has no damage, visable or hidden,
and that the case will meet or beat the table of limitations the
manufacturer has for that engine.

Craig C.

1: The prop strike was with a wooden prop or...

Some composite props, like IVO, break easy on impact. I had a prop
strike with IVO and had the crank magnafluxed. No flange runout or
cracks were found. I have a Franklin 6A350 engine (are they more
solid?).. It's the aluminum rigid props that are crank killers.
----------------------------------------------------------------
SQ2000 canard http://www.abri.com/sq2000

abripl wrote:
1: The prop strike was with a wooden prop or...

Some composite props, like IVO, break easy on impact. I had a prop
strike with IVO and had the crank magnafluxed. No flange runout or
cracks were found. I have a Franklin 6A350 engine (are they more
solid?).. It's the aluminum rigid props that are crank killers.

You're taking your chances either way. A few years ago I met a guy
at a Montana backcountry strip that was taking his wings off and
putting his Champ on a flatbed truck. Seems his crank snapped in
flight and he was lucky enough to be within gliding distance of a
usable strip. He had taxied his plane into a snowbank a few months
earlier. It stopped the engine, but hadn't damaged the prop, so he
assumed everything was OK. That assumption nearly killed him and his
passenger a few months later.

Prop damage or flange runout doesn't tell you anything about possible
cracks in the crank.

John Galban=====N4BQ (PA28-180)

If he hadn't run into the snow bank is there a guarantee that the crank
was OK? Aren't there faulty cranks for other reasons and it could have
been a coincidence? Also did he have an aluminum prop?

...............................Seems his crank snapped in
flight and he was lucky enough to be within gliding distance of a
usable strip. He had taxied his plane into a snowbank a few months
earlier. It stopped the engine, but hadn't damaged the prop, so he
assumed everything was OK. That assumption nearly killed him and his
passenger a few months later.
...

If your going to rebuild anyway, take a look at these.
http://www.airboattrader.com/PartsForSale.htm
Lou

Great site, I especially like the 8 cylinder Contential:

http://www.airboattrader.com/PartsF1420.jpg



"Lou" wrote in message
ups.com...
If your going to rebuild anyway, take a look at these.
http://www.airboattrader.com/PartsForSale.htm
Lou

Simple, More runout means that the crankshaft is bent more. Bent
more means it is more likely to be cracked and the prop fly off some
day.

On 6 Aug 2006 16:53:15 -0700, "
wrote:

http://www.whiteindustries.com/

White Industries lists engines with flange runout. What does flange
runout tell about the engine?

It seems some prop strike engines have a larger flange runout reading
than others, and the larger the flange runout, the lower the price.
Why?

Thanks.

wrote:
http://www.whiteindustries.com/

White Industries lists engines with flange runout. What does flange
runout tell about the engine?

It seems some prop strike engines have a larger flange runout reading
than others, and the larger the flange runout, the lower the price.
Why?

Thanks.

The run out will tell you how badly the flange is bent. Thats it. In
order to tell how much damaged there was you need to know several
things: What was the power setting when the engine had it's strike?,
What kind of prop?, What did it hit? Was it a sudden stop or a slow down?
Then you need to tear it down. Throw away the crank. have the case
throughly inspected, have all of the other moving parts throughly inspected.

Personally I would only buy one as a core exchange if the manufacturer
will take it.

Michelle