hoernlein profi
10-16-2010 | 12:24 AM
#1
Thread Starter
My Feedback: (171)
Joined: Jan 2004
Posts: 230
Likes: 0
Received 0 Likes
on
0 Posts
From: vacaville,
CA
hoernlein profi
hello guys i could use some help on this engine on it's value and displacement ,,there is a picture with a 45 mds engine for sizing the hoernlein ,the engine has been run some but have no idea of how much i am just trying to get an idea of what it's worth to so i can list it to sell ,it dose not belong to me i am selling it for a good friends family since he has passed away ,,i have posted it on another site (meca) but have gotten no response so far so any help here would greatly appreciated or direction to were i can get info thanks
10-16-2010 | 12:39 AM
#2
RE: hoernlein profi
It looks like it's the .40 size...there should be a red half moon aluminum placard stuck to the side of the case (that would indicate it's size ) but it's missing?
They are somewhat rare, but having been run, that will depreciate it's value considerably.
Do you have the box?
My guess would be between maybe 50 and 100 bucks...depending on how much it's been run, and how badly someone wants it.
They are somewhat rare, but having been run, that will depreciate it's value considerably.
Do you have the box?
My guess would be between maybe 50 and 100 bucks...depending on how much it's been run, and how badly someone wants it.
10-16-2010 | 04:40 PM
#7
Senior Member
Joined: Dec 2006
Posts: 375
Likes: 0
Received 0 Likes
on
0 Posts
From: Bedford,
TX
RE: hoernlein profi
I have the .61 and it seems like a good running engine. Ringed, steel cylinder and the carburetion is flawless. Mine says "imported by Nelson" on it. Putting a rear bearing in it now.....
10-16-2010 | 08:02 PM
#8
RE: hoernlein profi
ORIGINAL: Konrad
They may superficially look like a Tee Dee but the resemblance ends there. They are schnuerle ported.
They may superficially look like a Tee Dee but the resemblance ends there. They are schnuerle ported.
.
10-16-2010 | 08:17 PM
#9
RE: hoernlein profi
A friend had one of the .61's, and I saw a couple others (also .61's ) fly at various pattern meets during the mid 70's...
They ran ok, but didn't impress me as being any better than the Webra, or Kraft, O.S. FSR's etc.
If you installed the super quiet insert in the muffler, it really choked it down. (you can see one of the inserts in a couple of the pictures ) The rear end cap of the muffler un-screws and you can run it 3 ways...either as an empty can, or with either of the 2 inserts.
They ran ok, but didn't impress me as being any better than the Webra, or Kraft, O.S. FSR's etc.
If you installed the super quiet insert in the muffler, it really choked it down. (you can see one of the inserts in a couple of the pictures ) The rear end cap of the muffler un-screws and you can run it 3 ways...either as an empty can, or with either of the 2 inserts.
10-16-2010 | 08:19 PM
#10
Banned
Joined: Jan 2003
Posts: 1,030
Likes: 0
Received 0 Likes
on
0 Posts
From: Everett,
WA
RE: hoernlein profi
I'd like to see the Mk 2 sometime. Now I hope (know) that the Profi does not have the ball and socket issue that limits the Tee Dee. They weren't high RPM engines.
10-16-2010 | 08:22 PM
#11
Banned
Joined: Jan 2003
Posts: 1,030
Likes: 0
Received 0 Likes
on
0 Posts
From: Everett,
WA
RE: hoernlein profi
They tracked (throttled ) a little better than most in its day. But you are correct they really weren't anything to write home about. Their claim to fame is that they "look" like an over sized Cox Tee Dee.
10-17-2010 | 09:19 AM
#14
RE: hoernlein profi
ORIGINAL: Konrad
I'd like to see the Mk 2 sometime. Now I hope (know) that the Profi does not have the ball and socket issue that limits the Tee Dee. They weren't high RPM engines.
I'd like to see the Mk 2 sometime. Now I hope (know) that the Profi does not have the ball and socket issue that limits the Tee Dee. They weren't high RPM engines.
. Only two ports can be seen but there's a third hidden off to the right. The first Special had two exhaust ports like other TeeDees and their normal porting, the main change being a switch to a wrist pin and alloy rod. The Mk2 has the same piston/wristpin and rod but a single exhaust of smaller total area to fit the 3 transfer ports in the cylinder.
10-17-2010 | 11:40 AM
#15
Banned
Joined: Jan 2003
Posts: 1,030
Likes: 0
Received 0 Likes
on
0 Posts
From: Everett,
WA
RE: hoernlein profi
Thanks! That for sure is not the standard Cox radial porting. Is that the correct term? I'm now curious about the time line. Is the Profi based on the Cox or is the Cox based on the Profi?
All the best,
Konrad
All the best,
Konrad
10-17-2010 | 12:57 PM
#17
RE: hoernlein profi
ORIGINAL: Konrad
Thanks! That for sure is not the standard Cox radial porting. Is that the correct term? I'm now curious about the time line. Is the Profi based on the Cox or is the Cox based on the Profi?
All the best,
Konrad
Thanks! That for sure is not the standard Cox radial porting. Is that the correct term? I'm now curious about the time line. Is the Profi based on the Cox or is the Cox based on the Profi?
All the best,
Konrad
best prop on it was an 8x4 Cox Grey prop.
we ran these to thrust 450sq inch Free Flight models up into the thermals for class A.
problem was they did not last as long as the Cox Special which was before the MK2.......but then again, it was that time period that Cox's of all sizes were a crap shoot to get the ones that screamed vs the ones that became wallflowers. we ran 'em hard.
the Profi is a strong engine for it's time, and rivals several late 70's engines in it's class.
10-17-2010 | 01:25 PM
#18
Banned
Joined: Jan 2003
Posts: 1,030
Likes: 0
Received 0 Likes
on
0 Posts
From: Everett,
WA
RE: hoernlein profi
ORIGINAL: summerwind
actually that is the stock Cox porting for this engine, although, it wasn't called schnuerle ported.
best prop on it was an 8x4 Cox Grey prop.
we ran these to thrust 450sq inch Free Flight models up into the thermals for class A.
problem was they did not last as long as the Cox Special which was before the MK2.......but then again, it was that time period that Cox's of all sizes were a crap shoot to get the ones that screamed vs the ones that became wallflowers. we ran 'em hard.
the Profi is a strong engine for it's time, and rivals several late 70's engines in it's class.
ORIGINAL: Konrad
Thanks! That for sure is not the standard Cox radial porting. Is that the correct term? I'm now curious about the time line. Is the Profi based on the Cox or is the Cox based on the Profi?
All the best,
Konrad
Thanks! That for sure is not the standard Cox radial porting. Is that the correct term? I'm now curious about the time line. Is the Profi based on the Cox or is the Cox based on the Profi?
All the best,
Konrad
best prop on it was an 8x4 Cox Grey prop.
we ran these to thrust 450sq inch Free Flight models up into the thermals for class A.
problem was they did not last as long as the Cox Special which was before the MK2.......but then again, it was that time period that Cox's of all sizes were a crap shoot to get the ones that screamed vs the ones that became wallflowers. we ran 'em hard.
the Profi is a strong engine for it's time, and rivals several late 70's engines in it's class.
Yes, I'm sure the Profi could out run some baffle engines of the time, early 70's (73). But by the time I saw them late 70's (77) they were just also rans.
i didn't think you were.........
