|
The certified Lycomings and Continentals, being designed
for aircraft use have definite weight advantages over the automotive counterpart.
The Lycoming 0-360 weighs in at little over 300 lbs. To this weight must
be added propeller extensions, engine mounting frame, exhausts, heat muff
etc. etc. Soon the weight grows and the installed weight comes out at somewhere
around 350 lbs.
The Franklin which is a 220 hp engine is heavier being
a six cylinder design and the all up weight is estimated as in excess of
400 lbs. So how does the EG33 fair in this domain?
Some years ago, when the engine first arrived, the various
components were weighed using bathroom scales. The table below indicated
the weights of the various elements of the engine.
| |
Weight |
Moment Arm |
Moment |
| Engine (Including 6 ignition coils) |
276.0
|
10.9
|
3008.4
|
| Flywheel (From Lou Ross PSRU) |
4.0
|
20.5
|
82.0
|
| Left Injector Runner |
4.5
|
13.5
|
60.8
|
| Right Injector Runner |
4.5
|
13.5
|
60.8
|
| Water Manifold |
3.0
|
11.3
|
72.1
|
| Induction Manifold (Graphite) inc Throttle Body |
7.0
|
10.3
|
72.1
|
| Starter |
8.0
|
24.8
|
198.4
|
| Alternator |
8.0
|
3.0
|
24.0
|
| Computer |
1.0
|
-2.0
|
-2.0
|
| Totals For Engine |
316.0
|
11.2
|
3538.3
|
The PSRU weights are given in the next table. This PSRU
was Nigel Fields 2.17:1 Ross Aero model which is slightly different to
the 1.85:1 Ross Aero drive that was later fitted to the engine.
| |
Weight |
Moment Arm |
Moment |
| Bell Housing |
9.5
|
24.5
|
232.8
|
| Torsional Isolator |
4.0
|
20.5
|
82.0
|
| Input Shaft |
4.5
|
24.5
|
110.3
|
| Gearbox |
18.0
|
32.3
|
581.4
|
| Adapter Ring |
2.0
|
21.6
|
43.2
|
| PSRU Totals |
38.0
|
27.6
|
1049.6
|
The combined weights are given in the following table.
| |
Weight |
Moment Arm |
Moment |
| Engine |
316.0 |
11.2 |
3538.3 |
| PSRU |
38.0 |
27.6 |
1049.6 |
| Total For Engine & PSRU |
354.0 |
13.0 |
1587.9 |
Note : Moment arms are referenced to the outermost edge of the
harmonic balancer
Last Updated:
Thursday August 31, 2006 |
