Diehl Accessory Case


Diehl Accessory Case Picture


Since 1979, the Diehl Accessory Case has been providing accessory attachment and engine vibration isolation for VW powered homebuilt aircraft. The Diehl Accessory Case is very distinct from other manufactures.

The Accessory Case is made from almag 35, not just magnesium. This gives the case much more flexibility and retards ignition. Ever seen magnesium burn? Sparklers!

Our Flywheel is made from 100 percent steel. Experience has shown that many aluminum flywheels will fail around the dowel pin holes. In 19 years, we have not had one known flywheel fatigue failure from cracking. Our flywheels are lightened to about 6 pounds, balanced and bead blasted when done. They are the lightest flywheels available today. (Note: Flywheels are re-manufactured. Meaning the teeth aren't new.)

We were the first to initiate the use of a Geared Hi-Torque Starter for positive engine starting. Our competitors of course followed. Our geared starter provides 4 times the cranking power when compared to the older non geared starters. (Note: Starters are re-manufactured.)

We introduced the moulded ceramic based Magnet Ring for the 20 AMP internal alternator. This state of the art magnet ring eliminated the problem associated with steel caps coming loose off magnet rings as was sold by other VW conversion companies.

You can order the entire unit as a package and save a few dollars or you can order the items individually. The flywheel is available to fit either 4 or 8 dowel crankshafts. We also have replacement flywheels, mag drive, starter and alternator conversion kits for older HAPI and Mosler engines. Call for pricing!


The Complete Diehl Accessory Case Package includes the following:
Bottom Mount
Diehl Accessory Case
20 Amp Alternator Regulator/Rectifier Flywheel
Mag Drive Hub Mag Drive Starter Case Bolts
Complete, Bottom Mount Package Price . . . $679.70
Complete, Top
or 9 o'clock
Mount Package Price . . . $694.70
Add $15.00 for 8 Dowel Flywheel

Also Available Individually:
Diehl Accessory Case
Bottom Mount Starter!
$174.95
Diehl Accessory Case
Top or 9 o'clock Mount Starter!
$189.95
Geared Starter $149.95
4 Dowel Flywheel $134.95
8 Dowel Flywheel $149.95
20 AMP Alternator $169.95
Regulator/Rectifier $29.95
Mag Drive Kit $ 69.95
Type 4 Flywheel $185.00
Plus $45.00 Core Charge
Bolt Kit $ 3.99
HAPI Flywhell $185.00
HAPI Alternator $185.00
Must machine off .250" from
HAPI Stator stand off.
HAPI Mag Drive $79.95

HAPI to Diehl Adapter
Adapts a HAPI motor mount to a Diehl Accessory Case. Adapters are 2 inches long.

PRICE . . . $31.95 per set of 8.
Hapi to Diehl Adapter

Lycoming Bushing Kit
(not included in package.) Mounts the Diehl Accessory Case to the engine mount to provide engine vibration isolation and dampening.
PRICE . . . $31.95 per set of 8.
Lycoming Bushings


TIP: When mounting the regulator, it should be mounted on standoff with cooling fins vertical and you should use a 3/4" blast tube.

Go to Home Page Here!


To place an order: Call us at 1-800-922-6507 (US Only)
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