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Great Plains Aircraft Two Cylinder Engine Parts are intended for the "do it yourself" individual. We feature a forged, welded/counter weighted 78mm or 82mm crankshaft, made specifically for the 1/2 VW conversion.
Please the note the 1/2 heads pictured above are no longer available.
We offer cut and welded heads.
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| Stroke | 78mm | 82mm |
| Bore | 92mm | 92mm |
| Displacement | 1037cc | 1138cc |
| Weight | 87 lbs. * | 87 lbs. * |
| Horsepower | 35hp @ 3400 rpm | 38hp @ 3400 rpm |
* Full case weighs approximatly 5 additional pounds.
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CARR TWIN 1/2 VW INFORMATION The introduction of the "Carr Twin", as a "sawed in half VW engine", was designed by Dave Carr and was featured in the January, 1975, issue of "Sport Aviation" magazine. The "Carr Twin" was awarded the John Livingston Award for outstanding contribution to low cost flyings, as well as, the Stan Dzik Memorial Award for outstanding design contribution. The "Carr Twin" Plans offer plans for both the cut case and full case versions. ADVANTAGES OF THE VW ENGINE: Parts are low cost and available throughout the world. Lightweight: The crankcase is made of magnesium, 1/3 lighter than aluminum with wxcellent heat tranfer qualities. The heads are aluminum. An 87 pound, 35hp engine is hard to beat! Air-cooled: With both cylinders exposed to direct air stream. Crankshaft RPM corrects for direct mounting of propellor (no need to gear down or belt drive.) A four-stroke engine with generous bearing diameter means long life, extra reliability, and low fuel consumption. Can be used in tractor or pusher properllor configuration. The most important parts to build the "Carr Twin" can be obtained from Great Plains Aircraft! A fun project for the mechanical craftsman! The "Carr Twin" 1/2 VW Plans include: Two Crankcase options: Cut case, welded or bolted together - most compact version. Full Crankcase - The quickest to build version, because no machine work is necessary on the case. Engine can be mounted directly on firewall (no motor frame required), (no oil cooler required) and the crankcase can be returned to it's 4-cylinder configuration if more horsepower is needed.
"CARR TWIN" 1/2 VW PLANS |
| Morry Hummel 509 E. Butler Byron, OH 43506 (419) 636-3390 "1/2 VW Plans" |
L.E. Miholland Box 747 Brookshire, TX 77423 "Better Half VW Plans" Click Here to go to Miholland Web Site Here! |
| INDIVIDUAL PARTS | |||
| Full New Engine Case | * $499.95 | Rocker Arms | $45.00 |
| Rod Bearings | $5.95 | Prop Hub Kit w/Seal | $151.90 |
| Cam Bearings | $9.95 | 78mm or 82mm Forged CW Crankshaft | $699.95 |
| 92mm Piston & Cylinders | $119.95 | Main Bearings (double set) | $59.90 |
| Prop Hub Seal | $6.95 | Dowel Pin Set | $1.25 |
| Connecting Rods- Stroker | $74.95 | Camshaft | $84.95 |
| Lifters 4 each | $21.95 | Lock Nut & Washer Kit | $11.95 |
| Oil Pump | $21.95 | Case Kit | $17.95 |
| Welded Cylinder Head Kit | $599.95 | Oil Pump Cover Plate | $6.95 |
NOTE: Cylinder head kit includes 2 cylinder heads, valve covers, rockerarms, rockerarm shafts, valve guides, intake valves, exhaust valves, springs, keepers and retainers not assembled.
* 78mm stroke & 92 bore
| IGNITION SYSTEM COMPONENTS FOR THE 1/2 VW ENGINE | |||
| MAGNETO | 12 VOLT ELECTRIC | ||
| Modified Slick 4316 Magneto & Grounding Cap |
$525.505 | Bosch 009 Distributor | $54.95 |
| Shielded Plug Adaptors (2 each) | $48.00 | 12 Volt Blue Coil | $25.95 |
| Shielded Harness M2266 | $111.95 | Automotive Wires | $12.95 |
INTAKE - EXHAUST - CARBURETION FOR THE 1/2 VW
U-Build Exhaust Manifold Kit
Includes two exhaust welding flanges, two each 90 degree mandrel bent tubes and two each 180 degree mandrel bent tubes. Tubes are 8" long and 1 1/2" diameter.
Price . . . $ 39.95.
Model 11 Carburetor for the 1/2 VW.
This is an updraft carburetor with mounting flange and mixture control. Has idle air bleed screw also.
Price . . . $236.17.
U-Build Intake Manifold Kit
Includes two flanges, four each 90 degree pieces of 8" long, 1 1/2" O.D. tubing and one 180 degree U-bend.
Price . . . $44.95.
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To place an order: Call us at 1-800-922-6507
Questions at 1-402-493-6507
Fax us at 402-493-3846.
Inquiries can also be directed to:
gpasc@earthlink.net
Great Plains Aircraft Supply Co., Inc.
P.O. Box 545
Boys Town, NE 68010
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