OS FSa-81
The new FSa-81 is a direct replacement for the
FS-70 Surpass II, offering greater power and throttle precision in a
compact and lightweight design. The crankcase mounting dimensions allow
the FSa-81 to slot into the same mount that an FS -70S II would for an
instant power upgrade.
Like the
FSa-56, the crankcase breather
system has now been incorporated inside the engine to negate the need
for an external vent and the excess oil that eminates from it. A
propeller locknut assembly is of course standard.
The new F-5030
silencer is very effective, thanks to it's internal baffle and
carefully matched internal volumes and opassages. The design allows a
huge range of outlet positions to accomodate almost every model. Even
the distance away from the engine can now be adjusted.
The latest 60RA carburettor now features a 'constant velocity' inlet for improved throttle response and reduced spitting.
| Specification |
| Propeller Range: |
13x7-9, 14x6-7 |
|
|
|
|
| Displacement: |
13.26cc 0.809 cu.in. |
|
|
|
|
| Power Output: |
1.3PS @ 11,000 |
|
| Practical RPM: |
2,200 – 12,000 |
|
