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There are a lot of advantages to going with gas, like cleaner operation and cheaper fuel. But Saito™ 4-stroke gas engines give modelers more, namely some of the most impressive power-to-weight ratios in their class. The FG-21 engine is no exception. Based on the groundbreaking Saito FG-20 engine, it packs 21cc of power into a 17cc case. Accompanying the extra displacement is the latest carb technology, updated exhaust valve seats and, of course, the sweet 4-stroke sound Saito engines are famous for.
| Power Type | Gas |
|---|---|
| Benchmark Prop | APC 16 x 6 @ 8800 rpm |
| Bore | 1.26 in (32.0mm) |
| Crankshaft Threads | M8 x 1.25 mm |
| Cylinder Type | AAC |
| Cylinders | Single |
| Displacement | 1.25 cu. in. (20.52 cc) |
| Engine (Only) Weight | 24.1 oz (0.69 kg) |
| Ignition Weight | 4.0 oz (113 g) |
| Muffler Threads | 13mm |
| Muffler Type | Cast screw-on |
| Muffler Weight | 2.9 oz (83 g) |
| Oil Type & Content | 20:1 gas-to-oil ratio; EVOX1001Q synthetic oil recommended |
| Plug Type | 1/4-32 Spark Plug (SAIG20120) |
| Prop 65 | California Residents Prop 65 WARNINGS. |
| Prop Range | 15 x 8 to 16 x 8 2-blade; 14 x 9 to 15 x 7 3-blade |
| RPM Range | 2000-9500 |
| Stroke | 1.02 in (26.0mm) |
| Total Weight | 31.2 oz (0.89 kg) |
This replacement part is used in the following complete models.
P-47D Thunderbolt 20cc ARF with E-flite Electric Retract SetHAN2990CR
Valiant 10cc ARF, 69"HAN5080
1/5 Ryan STA GP EP Gas ARF 70.8"PMMA1600loading
