RE: Everything Radial Engines

RE: Everything Radial Engines
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RE: Everything Radial Engines - 7/12/2005 2:38:28 AM

Cybertom

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From: Streetsboro, OH, USA
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Mr. Robison,

I was looking at my last message reply and it was way to abrupt. I could have done a much better job of making my point. I have all the respect in the world for you. Please forgive me, after all you have forgoten more than I'll ever know!

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Real airplanes have 2-wings and round engines!

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Post #: 26

RE: Everything Radial Engines - 7/12/2005 2:40:24 AM

Cybertom

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From: Streetsboro, OH, USA
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See if you can get some performance specs from him. It's a BIG mystery!

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RE: Everything Radial Engines - 7/12/2005 3:00:25 AM

William Robison

Posts: 20269
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From: Mary Esther, Florida, FL, USA
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Tom:

Maybe I just have a thick ~~head~~ I mean hide, of course, but I didn't see nything abrupt in your earlier posts.

Numbers on the engines? Somewhere I have all the TP specs, but they are all the older series and have no application to the latest production. If I posted what I have on them it wouldn't be fair. Suffice it to say that the older TP engines, when used in an appropriate airplane, were excellent.

The old Burgess/Morton was the real dog of model radials, very few people managed to get a plane off the ground with one, the ones who did could just barely maintain level flight. Anything more was completely out of the question.

Bill.

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Post #: 28

RE: Everything Radial Engines - 7/12/2005 3:05:42 PM

chasrb

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Joined: 1/12/2003
From: Warrenton, VA, USA
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Tom, you're making me look even harder at the Robart 780 now... I would like the Siedel, but, geezzz can't they get it together?

As for a gas radial, I'd love it, it sounds scale and all that..but RCS is not going to build an engine that would fit our 1/4 scale Stearmans- I asked. The 215 is way too heavy and too much power. A 100 or 125cc would be perfect!

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Chasman

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RE: Everything Radial Engines - 7/13/2005 5:50:39 PM

HarryJ

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Joined: 6/15/2003
From: Mesa, AZ, USA
Status: offline

Tom,
There is a guy near you that makes gas engines, Ken Baker at D&B engines in Warren OH. He also makes ignition systems to replace the old magnito systems. I wonder if he has ever attempted to build a system for a 5 cyl or 7 cyl radial?

Harry

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Post #: 30

RE: Everything Radial Engines - 7/14/2005 12:50:30 AM

Cybertom

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From: Streetsboro, OH, USA
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Good question. Looks like we are building resources for an attempt at our own GAS radial engine

Hypothetically:

If we were to make an engine, should it resemble a particular full scale engine or not. If we were to mimic a full scale look what engine should it be? I have never seen a working model of a Continental radial engnie. They have a very distinctive look because the pushrods are behind the cylinders:

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< Message edited by Cybertom -- 7/14/2005 12:58:23 AM >

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RE: Everything Radial Engines - 7/14/2005 1:23:56 AM

HarryJ

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From: Mesa, AZ, USA
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Great idea! I would vote for the look of the Continental, perhaps a 5 cylinder version to start. All of the ignition system could go to the front wih an exhaust ring in the rear behind the pushrods and lower than the rocker boxes. This guy can build the exhaust system.
http://www.keleo-creations.com/

Harry

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Post #: 32

RE: Everything Radial Engines - 7/14/2005 3:52:55 AM

HarryJ

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From: Mesa, AZ, USA
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Here is a 1/4 scale 9 cylinder Gnome radial. They do run but I think they are mostly static display.

Harry

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Post #: 33

RE: Everything Radial Engines - 7/21/2005 2:59:19 AM

Frogman1195

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From: Lecanto, FL, USA
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Hey guys. I have a seven cylinder TechnoPower. Kelvin at keleo-creations did a great job a fabing me an exhaust. "pitts type" I have been wondering about the relatively low power that these TP's make (1 HP). What plane would you recommend attaching it to? Would love a stearman kit or arf.

Dave

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Post #: 34

RE: Everything Radial Engines - 7/21/2005 3:49:10 AM

William Robison

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From: Mary Esther, Florida, FL, USA
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Tom:

quote:

...a Continental radial engine. They have a very distinctive look because the push rods are behind the cylinders:

Not only the Continental R-670 Tom, all the Kinner radials had the cam ring behind the cylinders, and the Wright J-6 "Whirlwind" also was made with the cam behind the cylinders. See picture.

Dave:

What plane would suit depends on which series engine you have. Check the serial, it will have an "A" "B" or "C" in it.

Bill.

PS to Tom:
The J-6 was also heavily biased in rocker box finning to the exhaust side. The R-670 had a little bit but not nearly as much. Again, see the J-6 picture. wr.

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Real Airplanes have Two Engines
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Post #: 35

RE: Everything Radial Engines - 7/22/2005 6:27:44 AM

William Robison

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Tom:

Another with the push rod tubes in the rear was the small Siemens radial used on the Bucker Jungmeister.

Bill.

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Real Airplanes have Two Engines
AMA 25139 - More than 40 years.

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Post #: 36

RE: Everything Radial Engines - 7/24/2005 2:16:47 AM

Frogman1195

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From: Lecanto, FL, USA
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Bill,

It is a series "B" engine.

Dave

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Post #: 37

RE: Everything Radial Engines - 7/24/2005 5:25:53 AM

William Robison

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From: Mary Esther, Florida, FL, USA
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Dave:

7B? That makes yours a 2.00 engine, power about like a 120 single.

Weigh the engine without the exhaust ring - if it's right about 30-31 ounces it's the AAC version, no real worry about overheating. If it's heavier it has the steel sleeves with the aluminum muffs, don't idle it too long or sit on the ground with the engine running.

In either case it will still have the cast master rod, so keep the speed below 6000 rpm.

Tower and Hobby People, maybe Horizon as well, have Stearman and WACo biplanes in 120 size that should be fine with your engine.

A 16x6 prop should be about right.

Bill.

_____________________________

Real Airplanes have Two Engines
AMA 25139 - More than 40 years.

(in reply to Frogman1195)

Post #: 38