A few thoughts on "Aircraft Engines" vs. the regular kind.

JStricker wrote:
Long stroke, slow turning engines ARE still used and designed all the time
in agricultural, industrial, and marine applications. It all depends on
where you want your peak torque at. In an aircraft engine, the best prop
efficiency trade-off is in the 2200 - 2500 rpm range and the most efficient
way to transmit power is via direct drive, hence engines are designed for
the applications in which they are used.

Where are the long stroke, slow turning gas small boat engines?

In museums. Inboards ALL use autoderivative engines and ahve for
almost 50 years

Bret Ludwig wrote:


JStricker wrote:
Long stroke, slow turning engines ARE still used and designed all the
time
in agricultural, industrial, and marine applications. It all depends on
where you want your peak torque at. In an aircraft engine, the best prop
efficiency trade-off is in the 2200 - 2500 rpm range and the most
efficient way to transmit power is via direct drive, hence engines are
designed for the applications in which they are used.

Where are the long stroke, slow turning gas small boat engines?

In museums. Inboards ALL use autoderivative engines and ahve for
almost 50 years

Small boat motors turn small "props" at high speeds for usually not long
periods of time. Besides cooling is usually not a problem with a large
supply of cooling fluid! ;-)
John

Where did I say anything about small gas boat engines?

John Stricker

"Bret Ludwig" wrote in message
ups.com...

Where are the long stroke, slow turning gas small boat engines?

In museums. Inboards ALL use autoderivative engines and ahve for
almost 50 years

On Thu, 16 Feb 2006 06:59:37 -0600, "JStricker"
wrote:

Where did I say anything about small gas boat engines?

I take it you were talking about *real* boats, right John?:-))

Roger Halstead (K8RI & ARRL life member)
(N833R, S# CD-2 Worlds oldest Debonair)
www.rogerhalstead.com
Sitting here, running off the generator as the ice storm has dumped
the power for a wide area here near Midland MI.


John Stricker

"Bret Ludwig" wrote in message
oups.com...

Where are the long stroke, slow turning gas small boat engines?

In museums. Inboards ALL use autoderivative engines and ahve for
almost 50 years

I was actually thinking what I wrote......MARINE.........so yep, you're
right, I was thinking SHIPS, not boats.

John Stricker

"Roger" wrote in message
...
On Thu, 16 Feb 2006 06:59:37 -0600, "JStricker"
wrote:

Where did I say anything about small gas boat engines?

I take it you were talking about *real* boats, right John?:-))

Roger Halstead (K8RI & ARRL life member)
(N833R, S# CD-2 Worlds oldest Debonair)
www.rogerhalstead.com
Sitting here, running off the generator as the ice storm has dumped
the power for a wide area here near Midland MI.


John Stricker

"Bret Ludwig" wrote in message
roups.com...

Where are the long stroke, slow turning gas small boat engines?

In museums. Inboards ALL use autoderivative engines and ahve for
almost 50 years

I was actually thinking what I wrote......MARINE.........so yep, you're
right, I was thinking SHIPS, not boats

Convert THIS one for your airplane:

http://www.bath.ac.uk/~ccsshb/12cyl/

Dan

wrote:
I was actually thinking what I wrote......MARINE.........so yep, you're
right, I was thinking SHIPS, not boats

Convert THIS one for your airplane:

http://www.bath.ac.uk/~ccsshb/12cyl/

Hmm.
108000HP/2300 tons.
So, around 46hp/ton.

I don't exactly know how this compares with current aero engines, but I
do know that it's about the same as my car, including me!