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2 Stroke Radial made in the 1980's

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2 Stroke Radial made in the 1980's

Old 02-18-2013, 10:31 AM
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LaRebel24
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Default 2 Stroke Radial made in the 1980's

Hi, I was wondering if anyone remembers this engine. I seem to remember it was a 7 cyclinder 2 stroke radial engine burning 10% nitro fuel. The article or it could have been a video, not sure, showed it mounted in a Sukhoi RC plane. I can't remember the exact displacement, manufacturer, or the individual that built it. Any help in this matter would be greatly appreciated.


Thanks
Andrew
Old 02-18-2013, 12:01 PM
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big max 1935
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Default RE: 2 Stroke Radial made in the 1980's

Only US made 2 stroke radial made in the 1980's is the Mike, GR-6 made in two sizes ,1.274 & 2.807 .They were 6 cylinder using K&B .20 & .28 cylinders. Berger made a 7 cylinder in 1997 using K&B also. Technopower made 4-stroke radials back in the 1980's . Don't know what may have been made overseas. Help ? Max H AMA 14958
Old 02-18-2013, 12:20 PM
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LaRebel24
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Default RE: 2 Stroke Radial made in the 1980's

It was the Berger and I found the artcle showing the test and the pics of it mounted on the Goldgerg sukhoi.

Thanks for the great and quick info Max.

Andrew
Old 02-18-2013, 04:18 PM
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Default RE: 2 Stroke Radial made in the 1980's

I think that you would find that any two stroke radial engines would only have an even number of cylinders. Four stroke radial engines (single row) always have an odd number.
Old 02-19-2013, 12:33 AM
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Default RE: 2 Stroke Radial made in the 1980's

I remember watching the Berger run back around 96 or 7, with all the little Sportster cylinders at the London Bridge float fly. I think it was Mr. Berger running it and it was awsome I loved it. He also had that Sukhoi displayed with another engine mounted on the table.

The info package priced one out the door at 1300 bucks. I do remember that part well as I really had to work hard convincing myself not to give him an order on the spot but I was a good boy.

His shop was somewhere out at Hesperia Ca. I also do not recall how many cylinders but suspect High Plains above is correct. Still got that info pack somewhere dang wonder what happened to it.

John
Old 02-19-2013, 07:00 AM
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Default RE: 2 Stroke Radial made in the 1980's

There was a small radial made from Cox engines back in the 60's or 70's too. I think it was produced in Salina Kansas using .049's or .09's. It sold for a lot less.
Old 02-19-2013, 08:03 AM
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Default RE: 2 Stroke Radial made in the 1980's

II remember that engine. It was built by Dale........... aw nuts my mind crapped out. He had a hobby distributorship in his basement. Nice guy, quiet type. He set me up with my first successful airplane. A Tauri with citizenship reeds.
He also made several twin cylinder engines using cox .049's, geared together, but they tended to eat the gears.

My Gawd, that was what? 40? 50 years ago?
Old 02-19-2013, 08:54 AM
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LaRebel24
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Default RE: 2 Stroke Radial made in the 1980's

No it actually was a 7 cylinder radial that Lee Berger made using K & B 28 cylinders. Below is a link to the engine test article by Clarence Lee. Great article and I would have loved to hear it run.

Andrew

http://sceptreflight.net/Model%20Eng...%20Radial.html
Old 02-19-2013, 09:08 AM
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Default RE: 2 Stroke Radial made in the 1980's

OK I found the information sheet and it seems the Berger was a seven cylinder engine and it was a two stroke. I have been struggling to figure out how to scan the sheet so I could post it but no Joy.

Here are the listed specs:

Displacement 1.96 CI
Propellor 18X8
RPM 1500 to 8000
Fuel 15% nitro, 20% oil
Weight 58 ounces with muffler
Cylinders AAC Schneurle ported
Ignition Glow

The sheet shows pictures of the engine on the Goldberg Sukhoi and the states the price at 1199 bucks.

It started easily at the demos and sounded wonderful and I really do regrete having not made an order that day.


John
Old 02-20-2013, 04:52 PM
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Thomas B
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Default RE: 2 Stroke Radial made in the 1980's


ORIGINAL: Prairie Mike

II remember that engine. It was built by Dale........... aw nuts my mind crapped out. He had a hobby distributorship in his basement. Nice guy, quiet type. He set me up with my first successful airplane. A Tauri with citizenship reeds.
He also made several twin cylinder engines using cox .049's, geared together, but they tended to eat the gears.

My Gawd, that was what? 40? 50 years ago?
Dale Kirn...Kirn Kraft. He passed on last March 2012, a great loss to the world of 1/2A. I still have a few Kirn Kraft odds and ends in the garage.
Old 12-28-2014, 11:53 AM
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Lee Berger made a SEVEN cyl. 2 Stroke with K&B .61's.
Old 12-28-2014, 03:50 PM
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JohnBuckner
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The Berger seven cylinder that I witnessed that day so long ago on the beach at the London Bridge float fly and still to this day regret not having made an order indeed did use K&B cylinders however they were not .61's they were either the .20 Sportster or the .28 Sportster.

John

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