100hp 4cycle RW-100 engine

gyrojake

Gyro Rehab Candidate
Joined
Jan 1, 2007
Messages
2,310
Location
E-City, Florida
Aircraft
Gyroplanes
Total Flight Time
A few hours
I have a never removed from the crate, a 4 cylinder, 4 cycle, water cooled 100hp engine made by Rotorway.
This engine has a prop hub installed from the factory with thrust bearings added to the engine to accommodate the use of the prop.
This engine was made for Fixed wing, pusher or tractor. Dynafocal motor mounts
I have all the paperwork from the factory.
It has two mags a throttle body fuel injection. Starter, starter ring, alternator and regulator
Make me an offer or trade.
800kb.jpg
 

All_In

Gold Supporter
Joined
Apr 21, 2008
Messages
16,109
Location
San Diego, CA. USA
Aircraft
Airgyro AG915 Centurian, Aviomania G1sb
Total Flight Time
Gyroplane 70Hrs, not sure over 10,000+ logged FW, 260+ ultralights, sailplane, hang-gliders
How much does it weigh and how many gals an hour does she burn at cruise?
I don't know anything about this engine, is its history dependable as a Rotax and can you get parts?
 

Martin W.

Active Member
Joined
May 10, 2020
Messages
408
Location
Winnipeg
.

I remember when those engines came out ... they were for the Rotorway Scorpion helicopter and built by Rotorway .... then B.J. decided to also market them to fixed wing builders ... I believe the price was good , fuel economy was good , dependability was good especially compared to the 2-strokes of that era ...... however it was water cooled and plumbing in radiators etc was something foreign to builders and I dont think they sold many of them to the airplane guys.

I am pretty sure it is the same basic engine still used in the Rotorway helicopters with many updates bringing it to 133 hp and I think today is 150hp or more.

Dry weight with propeller says 160 pounds

.
 

Martin W.

Active Member
Joined
May 10, 2020
Messages
408
Location
Winnipeg
.

Should also mention it is direct drive .... no gearbox needed ... has a hefty crank end to handle prop loads ... and runs at about 2700 rpm which is the sweet spot for a propeller.

.
 

gyrojake

Gyro Rehab Candidate
Joined
Jan 1, 2007
Messages
2,310
Location
E-City, Florida
Aircraft
Gyroplanes
Total Flight Time
A few hours
To my understanding a 2.1L VW parts are the same for this engine.
The cases and the thrust bearings are unique to this engine
 

DASBUR

Member
Joined
May 11, 2005
Messages
174
Location
Burlington Wi
To my understanding a 2.1L VW parts are the same for this engine.
The cases and the thrust bearings are unique to this engine
The Rotorway engine was modeled after a type 1 VW air cooled engine. some of the early early 133 engines still used a type 1 engine case with the liquid cooled cylinders added on to it. the crank was there own forging. Camshaft and gears are about the only thing left that are VW
The RW 100 was built to sell to the fixed wing market to offset the cost of the Helicopter engines.There were either 50 or 100 Made
BJ Schramm tried to get Bert Rutan to use one in one of his planes. BJ said if he had the RW100 would have been better than the Rotax 912
Maybe if not better at least cheaper.

Doug
 

gyrojake

Gyro Rehab Candidate
Joined
Jan 1, 2007
Messages
2,310
Location
E-City, Florida
Aircraft
Gyroplanes
Total Flight Time
A few hours
The Rotorway engine was modeled after a type 1 VW air cooled engine. some of the early early 133 engines still used a type 1 engine case with the liquid cooled cylinders added on to it. the crank was there own forging. Camshaft and gears are about the only thing left that are VW
The RW 100 was built to sell to the fixed wing market to offset the cost of the Helicopter engines.There were either 50 or 100 Made
BJ Schramm tried to get Bert Rutan to use one in one of his planes. BJ said if he had the RW100 would have been better than the Rotax 912
Maybe if not better at least cheaper.

Doug
What kind of documentation do you have to back that up?
There were 100 made and this one is #61
I have the factory paperwork.
I will have to get it out and stop the wives tails
 

gyrojake

Gyro Rehab Candidate
Joined
Jan 1, 2007
Messages
2,310
Location
E-City, Florida
Aircraft
Gyroplanes
Total Flight Time
A few hours
http://www.enginehistory.org/Piston/HOAE/RotorWay.html

RotorWay International (US)​

B.J. Schramm of San Gabriel, California first flew his Javelin light helicopter in August 1965 after 7 years of development. His company was known first as the Schramm Aircraft Co. The company and the helicopter were renamed RotorWay Aircraft, Inc. and Scorpion, respectively, in about 1968 when operations moved to Mesa, Arizona. Early in his work, Schramm adapted liquid-cooled marine engines by Mercury and Evinrude for the propulsion systems. Later, he converted VW auto engines with the addition of liquid cooling. RotorWay engines are still derived from VW auto engines, but with specially manufactured aftermarket components just as most contemporary VW-based aircraft engines have. Schramm sold the company in about 1990 to John Netherwood, a RotorWay customer from the UK. The firm was renamed RotorWay International, Inc. and is now in Chandler, Arizona. Netherwood retired in about 1996 and sold the firm through an Employees Stock Ownership Program. The firm has continued to develop and manufacture kits for the helicopters and engines. The engines were marketed in the past for applications besides the RotorWay helicopters (see the RW-100 listing), but for at least 20 years have been sold only as part of RotorWay helicopter kits. Since all of these later engines have been developed for helicopters only, reduction from the crankshaft rpm to rotor speed is always necessary. Thus the engines can be designed to deliver maximum power at a much higher rpm than direct-drive engines of comparable displacement. Published details of all of their engines are limited; for example, no bore and stroke dimensions have been given in Jane's or on the RotorWay Web Site.




OL-100 -- {N/A / N/A / 100} / {N/A / N/A / 1639}

4cyl; RW-100; [email protected]; 1979-1982; Wt = 165#; TC = none.
Liquid-cooled, normally-aspirated, dual-ignition engine for horizontal applications as a tractor or pusher; developed as an alternative for the Continental O-200; a few complete, ready-to-run engines were built, sold, and delivered before cancellation of the project.
J81-82toJ83-84.
Applications: (US) Rutan VariEze.


OL-133 -- {N/A / N/A / 133} / {N/A / N/A / 2179}

4cyl; RW-133; [email protected]/A rpm; 1976-1984; Wt = N/A; TC = none.
Liquid-cooled, normally-aspirated, dual-ignition engine for RotorWay helicopter kits.
J75-76toJ83-84.
Applications: (US) RotorWay Scorpion 133.

4cyl; RW-133; [email protected]/A rpm; 1976-1984; Wt = N/A; TC = none.
Liquid-cooled, turbocharged, dual-ignition engine for RotorWay helicopter kits.
J75-76toJ83-84.
Applications: (US) RotorWay Scorpion 133.


OL-145 -- {N/A / N/A / 145} / {N/A / N/A / 2376}

4cyl; RW-145; [email protected]/A rpm; 1981-1986; Wt = N/A; TC = none.
Liquid-cooled, turbocharged, dual-ignition engine for RotorWay helicopter kits.
J81-82toJ85-86.
Applications: (US) RotorWay Exec.




OL-162 -- {N/A / N/A / 162} / {N/A / N/A / 2655}

4cyl; RW-152, RI-162F; 152, [email protected]/A rpm; 1986-present; Wt = 170#; TC = none.
Liquid-cooled, fuel-injected, turbocharged, electronic dual-ignition engine for vertical applications in RotorWay helicopter kits. RotorWay-developed Fully Automatic, Digital Engine Control (FADEC) is standard. A power increase from 152hp to 162hp through improved fuel management in the FADEC sytem was announced in July 2003 (KP11/03; SA9/03).
BGP; J86-87to present.
Applications: (US) RotorWay International Exec 162F.

4cyl; RI 600N; [email protected]/A rpm; 2007-present; Wt = N/A; TC = none.
Normally aspirated, updated version of RI-162F for RotorWay helicopter kits.
RotorWay Website.
Applications: (US) RotorWay International A600 Talon.

4cyl; RI 600S; [email protected]/A rpm; 2007-present; Wt = N/A; TC = none.
Belt-driven supercharged (not turbocharged) version of RI 600N for RotorWay helicopter kits. A RotorWay Altitude Compensation Induction System (ACIS) has been added to the FADEC system.
RotorWay Website.
Applications: (US) RotorWay International A600 Talon.


CONTENTS

Updated 8/24/08​

 

KM500

Junior Member
Joined
Oct 17, 2016
Messages
38
Location
Miami,fl
Aircraft
rotorway exce 90
I have a never removed from the crate, a 4 cylinder, 4 cycle, water cooled 100hp engine made by Rotorway.
This engine has a prop hub installed from the factory with thrust bearings added to the engine to accommodate the use of the prop.
This engine was made for Fixed wing, pusher or tractor. Dynafocal motor mounts
I have all the paperwork from the factory.
It has two mags a throttle body fuel injection. Starter, starter ring, alternator and regulator
Make me an offer or trade.
View attachment 1153736
do you trade for a fuel injected Rotorway 145 engine ?
 

KM500

Junior Member
Joined
Oct 17, 2016
Messages
38
Location
Miami,fl
Aircraft
rotorway exce 90
I have a never removed from the crate, a 4 cylinder, 4 cycle, water cooled 100hp engine made by Rotorway.
This engine has a prop hub installed from the factory with thrust bearings added to the engine to accommodate the use of the prop.
This engine was made for Fixed wing, pusher or tractor. Dynafocal motor mounts
I have all the paperwork from the factory.
It has two mags a throttle body fuel injection. Starter, starter ring, alternator and regulator
Make me an offer or trade.
View attachment 1153736
do you still has the engine available for sale ?
 

Rhino88

Newbie
Joined
Oct 31, 2022
Messages
1
Location
Detroit
I have a never removed from the crate, a 4 cylinder, 4 cycle, water cooled 100hp engine made by Rotorway.
This engine has a prop hub installed from the factory with thrust bearings added to the engine to accommodate the use of the prop.
This engine was made for Fixed wing, pusher or tractor. Dynafocal motor mounts
I have all the paperwork from the factory.
It has two mags a throttle body fuel injection. Starter, starter ring, alternator and regulator
Make me an offer or trade.
View attachment 1153736
Hello Jake......DO YOU STILL HAVE this Rotorway??? If so How much are you hoping to Get for it??.....Let's chat!!!!
 
Top