Harley engine special

We are having a special or Harley-Davidson engine packages.
We were going to have this at Sun-n-Fun butttt... since we
didn't make it there, we will go ahead with it now.
You can check them out at www.hog-air.com

Brett

I used to work in a power generation field. We had a picture of a 16" iron
pipe with a Hardley Ableson motor attached. The caption was "If Harleys
built aircraft, would you fly?". Also seen a lot of Hardleys pulled over at
the side of the road during their Redwood Run here in northern California.
But that was the old days. I kinda like their newest stuff that Harley
enginners wanted to build back in the 70"s but their dealer network wouldn't
let them as they feared that the end user would go for the 4
valve-watercooled stuff.

Dale Alexander

"Brett" wrote in message
om...
We are having a special or Harley-Davidson engine packages.
We were going to have this at Sun-n-Fun butttt... since we
didn't make it there, we will go ahead with it now.
You can check them out at www.hog-air.com

Brett

Looking at the Hog-Air site reminds me of the guy who drew up a
"Breezy Senior" with a Piper Aztec wing (the engine nacelle notches
skinned over) and a 8V71T Detroit Diesel turning what looked like a
cut down Sea Fury Dowty-Rotol five blader. He was a McDonnell-Douglas
engineer and his numbers actually looked good-of course it still only
had two seats and went 85 knots. The 350 hp, 2300 lb engine cut into
the useful load somewhat.

(Fred Collins) wrote in message . com...
Looking at the Hog-Air site reminds me of the guy who drew up a
"Breezy Senior" with a Piper Aztec wing (the engine nacelle notches
skinned over) and a 8V71T Detroit Diesel turning what looked like a
cut down Sea Fury Dowty-Rotol five blader. He was a McDonnell-Douglas
engineer and his numbers actually looked good-of course it still only
had two seats and went 85 knots. The 350 hp, 2300 lb engine cut into
the useful load somewhat.


I'm sorry but I fail to see the comparison.
I am simply offering a alternative engine for home built aircraft.
That now weighs less than 200lbs and makes 110 hp.

Brett

I don't mean to disrespect your project but the idea of flying behind
a Harley-Davidson engine-I owned a couple of them before yuppies made
them expensive, they were the most cantankerous, oil-leaking things
around. With only two cylinders don't you have torsional vibration
problems out the wazoo?

It seems like a short time ago the homebuilders finally figured out
you could use a modern liquid cooled auto engine, now you're running a
1930s air-cooled big displacement twin..Don't get me wrong, if it's
reliable I wish you all the success in the world, anything has got to
be better than Lycoming for an obsolete product peddled for a king's
ransom. I don't know what seems weirder, the sound of a Hog taxiing
out or the look on Harley management's faces if this actually becomes
popular.

"Fred Collins" wrote in message
om...
I don't mean to disrespect your project but the idea of flying behind
a Harley-Davidson engine-I owned a couple of them before yuppies made
them expensive, they were the most cantankerous, oil-leaking things
around. With only two cylinders don't you have torsional vibration
problems out the wazoo?


The Harley Evolution engine is quite dependable and doesn't leak oil. It
runs 10 or so degrees cooler than the shovelhead engine. Having owned and
ridden a brand new '89 H-D Softtail Heritage, and now owning a shovelhead
from the 70's and a panhead from the 60's I can vouch for the durable,
dependable Evo engines.

BTW, I have no interest in converting H-D engines to aircraft use and don't
know anyone who is doing it. I have visited a H-D to aircraft conversion
website once, probably 6 months ago. I'm strictly a Continental and
Lycoming kind of a guy.

I don't care how well the engine performs in the bike,
putting it in an airplane is just plane(?) dumb.

I amd NOT going to bolt a prop on THAT crank.

It wasn't designed for anything like prop loads.

And, I doubt any assembled crankshaft COULD survive such service.


But other than that, Mrs. Lincoln, how was the play?



Richard

"Richard Lamb" wrote in message
...

I don't care how well the engine performs in the bike,
putting it in an airplane is just plane(?) dumb.

I amd NOT going to bolt a prop on THAT crank.

It wasn't designed for anything like prop loads.

And, I doubt any assembled crankshaft COULD survive such service.


But other than that, Mrs. Lincoln, how was the play?



Richard

Well, I went and looked at the site, Dick, and the engine looks to have a
redrive, in which case your argument is all wet. Mrs. Lincoln advises you
put your thinking cap on if you have one.

jls wrote:

"Richard Lamb" wrote in message
...

I don't care how well the engine performs in the bike,
putting it in an airplane is just plane(?) dumb.

I amd NOT going to bolt a prop on THAT crank.

It wasn't designed for anything like prop loads.

And, I doubt any assembled crankshaft COULD survive such service.


But other than that, Mrs. Lincoln, how was the play?



Richard

Well, I went and looked at the site, Dick, and the engine looks to have a
redrive, in which case your argument is all wet. Mrs. Lincoln advises you
put your thinking cap on if you have one.


Oh, pardon me for not chasing every link on the net.

It's still a pinned crankshaft.

But, hey, I'm just some nut that don't know nothing.

Best of luck.

Richard

(a post from the past - brought to you in person
since I couldn't figure out how to reference a single
message from the archives...)

refering to a skin vibration issue on an amphibian project.
(12/18/2001)

================================================== =========

The structure is built but has serious vibration problems?

If it's not something out of balance, then it's probably
(oh no!) resonant harmonics.

Something I learned here...

"brute force works fine, but you have to use enough of it".


All things have a natural vibration frequency.
When tapped, that's the note they "ring" at.
The natural resonant frequency of that thing.

Tapping on a tuning fork makes a single clear note.

Tapping on a bridge, say a column of soldiers marching
across in step, can destroy the bridge.

Two very different examples of harmonic resonance.

No way to offer specific corrections. But something to
think about?

You can't _see_ vibration. (unless it gets bad enough
that you can, but that's way too late)

But you can feel it. Fingertips and backs of the knuckles.

Generally, I'd immediately suspect long slender structures.
Especially highly stressed long slender things (like engine
pylons?)

Start her up and get her buzzing just a litle bit, and just
feel her up. Touch all her parts, and in different places.
See if you can find what's making her shake, and where she's
really excited.

(whew!)
Anyway...

That's where you'll want to stiffen it up...