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40 size gas engine

Old 03-18-2020, 04:10 PM
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Default 40 size gas engine

Just one question is there a gasoline engine with a foot print similar to that of a OS 61fx? If so where do I get one?
Old 03-19-2020, 11:45 AM
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You might want to talk to Horizon. They handle OS and also Saito and Saito has a 11CC gas that supposedly uses the SA61 platform. If that OS61FX has a rear needle valve you might have enough clearance for a rear carburetor engine.
Old 03-19-2020, 12:05 PM
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I would look at the OS15GT. It's a little pricey but it is a beam mount front carb.

Old 04-11-2020, 12:51 PM
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NV makes a GX 40RC gas engine - uses Castor lube and gas @ 14% mix. 11 x 6 @ 11,000 rpm, 10 x 7 - 12.25 x 3.75 recommended. 62mm crankshaft centerline to top of head, 82mm backplate to prop hub, 43mm x 17mm mount. Glow ignition like OS GGT series (turbo glow plug).

If you like to "tinker" with engines (I don't - and have more engines than I'll ever use), I'd sell one pretty cheap.

Last edited by triumphman49; 04-11-2020 at 02:06 PM. Reason: incorrect measurements
Old 04-12-2020, 08:13 AM
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There are a few 10cc engines out there. rcgh, vvrc, ngh all three of these are used at my flying field.VVRC 10cc Rear Exhaust gas engine, formally RCGF
Type : 2 cycle piston valve type gasoline engine for airplane
Displacement (cc) : 10cc (0.61 cu in)
Bore x Stroke (mm): 1.08 in (27.6mm)*0.67 in (17mm)
Carburetor :
Ignition : DC-CDI (Computer Controlled auto advance, electronic ignition system)
Power supply: 4.8-8.4V
Maximum Output : 1.9 hp/1.4KW
Requires: Gasoline, 2-cycle oil, ignition battery & propeller
speed rang : 1800-12000rpm
Gasoline-Version : Pre-mixed Fuel, (recommended : 30:1)
Lubrication Oil : 2 cycle engine oil
Propeller : 13*7 9800 rpm; 14*6 9000rpm (Standard Two leafs prop)
recommended props :13 x 6, 14 x6,13X8,13X7.
Cooling System : Air Cooled
Engine package Includes: electronic CDI ignition, muffler, spark plug, gaskets, bolts, throttle arm extension & manual.

Weight :
Engine:1.03 lb (468 g)
Muffler: 1.4 oz (40g)
Ignition Module:4.1 oz (115 g)
Total: Weight: 1.37 lb (623 g)
Technical Data:
Ignition Battery: 4.8-8.4 NiCd or NiMH, 6.6V LiFe or 2S LiPo pack
Gasoline/Oil Mix:30:1
Replacement Spark Plug:1/4-32 SIZEor equivalent
Idle Speed: 1800 rpm/min
Static Thrust:
8.38 lb (3.8 kg) @ 328 ft (100 m) altitude
7.94 lb (3.6 kg) @ 5,900 ft (1800 m) altitude

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