NEW RCGF Stinger 20cc Twin 
20cc Twin cylinder engines are available now
Smooth operation — Smaller size, you can get more smooth fly experience. It’s small, powerful and easy starting.  It’s your very good choice for small size twin cylinder engine
 
Glow size：economy and powerful
NEW ENGINE ,NEW Design,More powerful!
Strong Power give you unprecedented fly experience.
It’s your very good choice for small size twin cylinder engine
 
Type
2 cycle piston valve type gasoline engine for airplane
Displacement (cc)
20.5cc (1.25 cu in)
Bore x Stroke (mm)
1.08 in(27.6mm) x 0.67 in (17mm)
Recommended props
15×8, 16×8, 17×6 
Maximum Output
2.8HP /2.1KW
Power supply
7.4V-14V
 
 
Distance from cap to cap is 173 mm  / 6.81 in
Carburetor : Walbro
Ignition : Stinger DC-CDI (Computer Controlled auto advance, electronic ignition system)
SPARK PLUG: M8(1/4-32)
Requires: Gasoline, 2-cycle oil, ignition battery & propeller
speed rang : 1500-8600rpm
Gasoline-Version : Pre-mixed Fuel, 25-40 (Gasoline):1 (recommended : 30:1) 
Lubrication Oil : High quality fully synthetic 2 cylinder oil such as Motul 800 2T 100% synthetic racing motro oil , Red line two-stroke racing motor oil , Stihl Ultra high performance 2 cycle fully synthetic engine oil etc . 
Break in Propeller : 16X8 (Standard Two leafs prop)
Cooling System : Air Cooled
RCGF Stinger Engine package Includes: electronic CDI ignition, muffler, spark plug, gaskets, bolts, throttle arm extension & manual.
Weight:

Engine: 1.63 lb (740g)
2XMuffler: 2.64 oz (75 g)
Ignition Module: 4.94 oz (140 g)
Total: Weight: 2.02 lb (920 g)
Technical Data:

Ignition Battery: 7.4V-14VNiCd or NiMH, 7.4V LiFe or 2S LiPo pack
Gasoline/Oil Mix: 30:1
Replacement Spark Plug: M8 1/4-32 or equivalent
Idle Speed: 1800 rpm/min