 |
|
|
|
|
 |
|
O.S. engines have always placed the highest priority on ease of use, and the FL-70 -- part of a new 4-stroke engine series -- is no exception. It’ a completely new design, intended to allow larger numbers of radio-control pilots to enjoy the performance and sophistication of 4-stroke engines.
Although 4-stroke engines are more complex than 2-stroke styles, the FL-70 keeps the number of parts to the absolute minimum. The worm gear in the crankshaft rotates the camshaft. The rotation is transmitted to a push rod and rocker cam, and drives the exhaust valve together with the engine rotation.
Mechanically minded hobbyists will find the FL-70 irresistible ? its valves and camshafts are no bigger than your little finger. In fact, this engine might well offer the most excitement you’ve ever experienced in R/C modeling. Visit your hobby shop today and get an FL-70. Soon, you too will be enjoying the advantages of 4-stroke power.
|
|
 |
The camshaft profile was developed for power and ease of handling. |
 |
The head is a new design which, although simple, delivers high performance. |
|
|
|
|
|
|
| Specifications |
|
FL-70 |
|
|
|
| Output |
*
|
1.1ps/11,000rpm |
|
|
|
| Practical r.p.m.Range |
* |
2,300-12,000rpm |
|
|
|
| Displacement |
* |
0.699cu.in |
|
|
|
| Bore |
* |
1.091in |
|
|
|
| Stroke |
* |
0.748in |
|
|
|
| Weight |
* |
16.47oz |
|
|
|
| SILENCER F4030 |
|
|
|
|
|
|
|
|
|
|
|
 |
|
|
|
|
 |
|
|
|
 |
|
Now that R/C helicopters offer improved performance, stability, and maneuverability, pilots want more power. Everybody wants to upgrade their equipment. This Max-37SZ-H RING has been produced in response to requests from 30 Class users who wanted "just a bit more power...." -- and to experience the full benefits of an extra "5" displacement size. |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
 |
|
In helicopter flight, the most desirable characteristics are stability when hovering and power in flight. There are various methods for achieving that performance, but with the Max-50SX-H RING Hyper, we did it using the shape of the combustion chamber and the big bore carburetor. This powerful engine remains stable over its entire RPM range and is bound to give would-be pilots the motivation to take up new challenges. |
|
|
|
|
|
|
|
|
|
|
|
|
| Specifications |
|
MAX-37SZ-H RING |
|
MAX-50SX-H RING Hyper |
|
|
|
|
|
| Output |
* |
1.4ps/18,000rpm |
|
1.9ps/17,000rpm |
|
|
|
|
|
| Practical r.p.m.Range |
* |
2,000-21,000rpm |
|
2,000-20,000rpm |
|
|
|
|
|
| Displacement |
* |
0.370cu.in |
|
0.499cu.in |
|
|
|
|
|
| Bore |
* |
0.806in |
|
0.866in |
|
|
|
|
|
| Stroke |
* |
0.725in |
|
0.847in |
|
|
|
|
|
| Weight |
* |
10.34oz |
|
14.33oz |
|
|
|
|
|
|
|
|
|
|
|
|
|
