Is a half Subaru possible?

Homebuilt Aircraft & Kit Plane Forum

Help Support Homebuilt Aircraft & Kit Plane Forum:

13brv3

Well-Known Member
HBA Supporter
Joined
Feb 14, 2018
Messages
183
Location
Tellico Plains, TN
Greetings,

I've seen 1/2 VW engines, and 1/3 Corvair engines, but I can't seem to find any info on a 1/2 Subaru. I don't know that much about the Subaru engines, but I was just curious if it's been done, or if it's even possible.

Thanks,
Rusty
 

nerobro

Well-Known Member
Log Member
Joined
Nov 6, 2011
Messages
1,114
Location
Northern Illinois
It's been "done" But it's far from easy. when I say it's been done, water cooled blocks have been both cut down, and stretched over the years. There's V-12 GM blocks, and v4 and v6's built off of chevy v8's too. .... It's certianly not easy.

VW, and Corvair are "simpler" because there's no water jackets to think about. Also, they're older tech, and have more garage friendly tolerances. Half VW's are nearly a hacksaw job.
 

13brv3

Well-Known Member
HBA Supporter
Joined
Feb 14, 2018
Messages
183
Location
Tellico Plains, TN
I hadn't considered the water jacket problem, so that makes sense. That probably explains why I've never heard of one.
Thanks,
Rusty
 

slociviccoupe

Well-Known Member
Joined
Apr 1, 2011
Messages
366
Location
Palm Bay Fl.
So looking at my subaru and id say yes but not keeping it opposed. You would remove the cylinder bank from the crank case without the waterpump. And then weld on a plate to create an oil pan. Prety much becoming an inline twin.
 

cheapracer

Well-Known Member
Log Member
Joined
Sep 8, 2013
Messages
6,340
Location
Australian
There was a v-twin Merlin, too.
Yes, and I have been to Lucky Kaiser's house, 10 minutes from where I used to live, and had a good look at it.
Beenleigh, Queensland for the Australians.

So looking at my subaru ....
I don't see how one could go past a BMW twin.

You would only go to the trouble for an air cooled engine, VW obviously.
 

Marc W

Well-Known Member
Joined
Mar 31, 2017
Messages
720
Location
Colorado
Ask and ye shall receive! The following photos are from the June and July 1998 Experimenter magazines.

1595022579055.png
1595022617999.png
 
Last edited:

13brv3

Well-Known Member
HBA Supporter
Joined
Feb 14, 2018
Messages
183
Location
Tellico Plains, TN
Interesting. Thanks for posting that. I guess it wasn't a big hit since it was announced over 20 years ago.
Rusty
 

sotaro

Well-Known Member
Joined
Feb 26, 2011
Messages
175
Location
San Francisco
While the Subaru heads are attractive, there are so many engines of the 500-1500cc range that makes building one seem to be an extraordinary investment of time and energy. The 500cc Yamaha Phazer snowmobile engine is in the 70 hp/130 lb range. Liquid cooled with a PSRU, it really only requires assembly with some fabrication. I wonder how the Subaru minus 2 worked? It would have to have a 180 degree crankshaft... I wonder how much it vibrated?
 

rotorcycle

New Member
Joined
May 17, 2015
Messages
1
Location
Surfers Paradise Qld. Australia
Aerotek (Canada)


The Aerotek engine below was converted from a Subaru automobile engine and was built by Aerotek Performance Products of Lethbridge, Alberta, Canada. Aerotek developed the adaptation for builders of homebuilt, experimental aircraft requiring a 40-60hp engine. The approach taken by Aerotek was similar to what many developers have done with VW engines and some with Corvair engines; i.e., modified a four- or six-cylinder HOAE into one with two (or three) cylinders. Most Subaru conversions require reduction of propeller rpm from that of engine rpm; i.e., a Propeller Speed Reduction Unit (PSRU). The Aerotek PSRU incorporates a belt drive of the firm's own design. The information here has been compiled from the Ultralight News Report from Sun'n'Fun 1998. and from SA9/98. All of these engines are non-certificated engines for use in experimental, homebuilt aircraft.

2cyl; Aerotek 1/2 Subaru EA-82; [email protected]/A rpm; 1998-2000; Wt = 100-125#.
Liquid-cooled, carbureted, distributorless, single-ignition engine; geared to 0.476 by an Aerotek belt-driven PSRU.
SA9/98; Ultralight News Website.
Applications: (US) Sky Raider (built by Ken and Stace Schrader).

I believe Aerotech converted Subaru motors to both inline & horizontally opposed (boxer) twin cylinder units.

Another engine that has been used extensively in aircraft application, is the Subaru line - and Aerotek Performance products of Lethbridge Alberta has taken the "half Volkswagen concept" and applied it to two Subaru engines. The engines based on the Subaru EA 82 - minus two cylinders is 900 cc and comes in 45 and 60 hp. It also comes with direct fire ignition - which in automotive land means distributorless ignition.

Weight for either the horizontal or upright configuration comes in at 125 lbs. compete with a 2.1 to 1 belt reduction drive. TB0 is expected to come in at 1200 hours, this is bases on over 18 years of engine experience - by Aerotek including supplying engines to Canada's largest rotor craft builder RAF.

For more information contact Aerotek Performance Products 719 - 29th St. North Lethbridge Alberta Canada 403-380-4500
 

Attachments

Last edited:
Top