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Fuji Norvel Norvel Norvel Norvel Norvel 1 / 2 A E N G Thunder Tiger .099 RC aircraft engine BigMiG Start'Up .049 BigMiG Start'Up .061 AME.Q49(CL/RC) AME .061 (CL/RC) BigMiG Sport .049 (CL/RC) BigMiG Sport .061 (CL/RC) BigMiG Sport .074 t Weight includes muffler * Available in both control-line and RC versions House of Balsa Is known for Its high-quality, fine-scale V2A kits such as this 36-inch Beechcraft Bonanza; $59.95. House of Balsa Super Decathlon: $59.95. House of Balsa P-51 Mustang; $59.95. WEIGHT (0Z.) DISPLACEMENT 4.32 2.39 t 2.39 t 1.69/1.831 0.05 1.69/1.83 t 1.69/1.83? 1.69/1.83 t 2.65 t 0.10 0.05 0.06 0.05 0.07 THROTTLE PRICE Y N N $39.95 $149.99 $49.99 $45.99 $55.99/$75.99 $55.99/$75.99 $45.99/$59.99 $34.99/$59.99 $75.99 1/2A ENGINES & NITRO CONTENT by Dave Gierke This Cox Babe Bee Is typical of the classic 1/2A and free-flight engines. It has no throttle and does not require a dedicated RC channel. The engine mount also serves as the fuel tank and the carb; after the needle Is tuned for the desired rpm, the engine will operate at a constant speed. Price: $47.29. 1/2A glow engines that operate on methanol- (alcohol-) dominated fuel have a problem-they're tremendously over-cooled! In the late 1940s, the newly developed "baby engines" barely ran on glow fuel that was formulated for larger displacement engines. Containing mostly alcohol, castor oil and a bit of nitromethane, this fuel was inadequate for the new breed of tiny engines. They protested by being difficult to start and touchy to adjust, and they ran , roughly. The difficulty turned out to be the surface area of the cylinder and head when compared with the cylinder displacement; this important ratio is much larger for small engines than it is for large engines. Look at these examples of displacement versus cylinder surface area. An .049 has a ratio of 13:1, a .40's is 6:1, and a 1.2's is just 4:1. The solution? Add Thunder Tiger GP-07; $49.99. nitromethane to the fuel; between 25 and 35 percent works well. The Norvel Big (WIG Sport .074 ($75.99) is one of the newer generation of throttleable 1/2A engines. It operates much like any larger RC glow engine; a channel is assigned to control a servo that moves the As we know, nitro throttle position on the carb. adds power and heat to the operating cycle of any engine. Additional nitro allows the temperature of the crankcase to increase and provides needed thermal energy to vaporize liquid fuel components before transferring them to the cylinder for combustion. Vaporized fuel does a better job of mixing with air and burning than do liquid droplets in an over-cooled engine.
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Fuji<br />
Norvel<br />
Norvel<br />
Norvel<br />
Norvel<br />
Norvel<br />
1 / 2 A E N G<br />
Thunder Tiger<br />
.099 RC aircraft engine<br />
BigMiG Start'Up .049<br />
BigMiG Start'Up .061<br />
AME.Q49(CL/RC)<br />
AME .061 (CL/RC)<br />
BigMiG Sport .049 (CL/RC)<br />
BigMiG Sport .061 (CL/RC)<br />
BigMiG Sport .074<br />
t Weight includes muffler * Available in both control-line and RC versions<br />
House of Balsa Is known for Its high-quality,<br />
fine-scale V2A kits such as this 36-inch<br />
Beechcraft Bonanza; $59.95.<br />
House of Balsa Super Decathlon: $59.95.<br />
House of Balsa P-51 Mustang; $59.95.<br />
WEIGHT (0Z.) DISPLACEMENT<br />
4.32<br />
2.39 t<br />
2.39 t<br />
1.69/1.831 0.05<br />
1.69/1.83 t<br />
1.69/1.83?<br />
1.69/1.83 t<br />
2.65 t<br />
0.10<br />
0.05<br />
0.06<br />
0.05<br />
0.07<br />
THROTTLE PRICE<br />
Y<br />
N<br />
N<br />
$39.95<br />
$149.99<br />
$49.99<br />
$45.99<br />
$55.99/$75.99<br />
$55.99/$75.99<br />
$45.99/$59.99<br />
$34.99/$59.99<br />
$75.99<br />
1/2A ENGINES & NITRO CONTENT by Dave Gierke<br />
This Cox Babe Bee Is typical of<br />
the classic 1/2A and free-flight<br />
engines. It has no throttle and<br />
does not require a dedicated<br />
RC channel. The engine mount<br />
also serves as the fuel tank<br />
and the carb; after the needle<br />
Is tuned for the desired rpm,<br />
the engine will operate at a constant speed.<br />
Price: $47.29.<br />
1/2A glow engines that operate<br />
on methanol- (alcohol-)<br />
dominated fuel have a<br />
problem-they're<br />
tremendously over-cooled! In the late 1940s, the newly developed "baby<br />
engines" barely ran on glow fuel that was formulated for larger displacement<br />
engines. Containing mostly alcohol, castor oil and a bit of nitromethane, this fuel<br />
was inadequate for the new breed of tiny engines. They protested<br />
by being difficult to start and touchy to adjust, and they ran ,<br />
roughly. The difficulty turned out to be the surface area of<br />
the cylinder and head when compared with the cylinder displacement;<br />
this important ratio is much larger for<br />
small engines than it is for large engines. Look at<br />
these examples of displacement versus cylinder surface<br />
area. An .049 has a ratio of 13:1, a .40's is 6:1,<br />
and a 1.2's is just 4:1. The solution? Add<br />
Thunder Tiger<br />
GP-07;<br />
$49.99.<br />
nitromethane to the fuel; between 25 and 35<br />
percent works well.<br />
The Norvel Big (WIG Sport<br />
.074 ($75.99) is one of the<br />
newer generation of<br />
throttleable 1/2A engines. It<br />
operates much like any<br />
larger RC glow engine; a<br />
channel is assigned to control<br />
a servo that moves the<br />
As we know, nitro throttle position on the carb.<br />
adds power and heat to the operating cycle of any engine.<br />
Additional nitro allows the temperature of the crankcase to<br />
increase and provides needed thermal energy to vaporize liquid<br />
fuel components before transferring them to the cylinder<br />
for combustion. Vaporized fuel does a better job of mixing<br />
with air and burning than do liquid droplets in an<br />
over-cooled engine.
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