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  #11  
Old 04-20-2014, 10:45 PM
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Quote:
Originally Posted by ghrocketman
The Cox Tee-Dee series engines are all very high performance front-rotary valve (crankshaft) induction that turn high RPM.

The PeeWee 020 is a shrunken version of the low-performance babe-bee 049.
Thank you for explaining the difference between them. I'm pretty sure the .020 on my Cox Bell 47G helicopter was a Pee Wee, as it didn't run very fast even at maximum throttle. I'm just glad that practical electric power came along, because besides the messy nature of glow engines, the high-pitched "eeeeeeeeeeee!" sound that the small ones make sets my teeth on edge.
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  #12  
Old 04-21-2014, 07:00 AM
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Default Cox .020 powered Bell-47

I had a Cox Bell-47 back in the '70s.

After tuning the engine let the rotors get up to speed. Launch straight up with a light
push from the palm of your hand. The Fuselage did counter-rotate on the way up.

Bob
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  #13  
Old 04-21-2014, 07:30 AM
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Quote:
Originally Posted by Blushingmule
I had a Cox Bell-47 back in the '70s.

After tuning the engine let the rotors get up to speed. Launch straight up with a light
push from the palm of your hand. The Fuselage did counter-rotate on the way up.

Bob
It was a nice 'copter, with excellent cockpit and latticework tail boom detail. I always let the rotor rev up as fast as it would spin, after carefully adjusting the engine's needle valve for maximum RPM. I launched it exactly as you did. It would go up to about 10 feet above the ground, then slowly settle back down and land smoothly on its skids. It behaved like a balloon that was just -barely- too heavy to be buoyant. Had we been at or near sea level, I think it would have flown as yours did, but being at well above 4,000 feet above sea level, I think the air wasn't quite dense enough for the engine (power) and the propeller plus the rotor blades (lift) to enable the model to fly. If Estes (or maybe Cox International in Canada) has the molds for the Bell 47G, I'd love to see an electric-powered version (with a timer-controlled motor run time) be released.
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  #14  
Old 05-08-2014, 05:20 AM
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Quote:
Originally Posted by blackshire
Have you looked in Cox International's online catalog (see: http://coxengines.ca )? They might have the part that you need. If not, hopefully the broken landing gear on your Airwolf model is wire, which is easier to replace than a molded plastic component. Indeed, licensed TV show "tie-in" models like those are often in production for shorter periods of time (until the shows themselves are cancelled--for example, Centuri's Buck Rogers kits were made for only a couple of years), which makes them rarer and more collectible. Also:

My Cox Bell 47G was quite heavy for its size, which was no doubt part of why its .020 engine couldn't quite lift it (our 4,000'-plus altitude in the mountains was likely another factor), and I imagine your Cox Airwolf model is also heavy for its size.



This product was only offered for one season, two years after the show went off the air. When I contacted Estes for parts replacement, they said no parts were available except for the motor.
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  #15  
Old 05-08-2014, 06:42 AM
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Quote:
Originally Posted by dlazarus6660
This product was only offered for one season, two years after the show went off the air. When I contacted Estes for parts replacement, they said no parts were available except for the motor.
That's interesting that the Airwolf helicopter was offered that long after the TV show was cancelled. Maybe mold production problems and/or protracted licensing negotiations caused or contributed to the delay, and having already sunk money into the product's development, they decided to release it in order to recoup at least some of their investment? Maybe you could have the opposite-side (undamaged) landing gear part scanned with a contourometer (I don't know where, but contourometers have been used since the 1950s for sizing & shaping jet pilots' helmets to fit their wearers' heads), then have a mirror-image file of it made and 3-D printed in plastic.
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  #16  
Old 05-08-2014, 08:46 AM
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Speaking of Airwolf, I just came across an interesting--and sad--bit of history about the Bell 222 helicopter that was filmed as Airwolf, in this Wikipedia article (see: http://en.wikipedia.org/wiki/Airwolf ). It is this:

The Airwolf helicopter[edit]
Main article: Airwolf (helicopter)
"The flying Airwolf helicopter was actually a Bell 222, serial number 47085, sometimes unofficially called a Bell 222A.[7] During filming of the series, the helicopter was owned by Jetcopters, Inc. of Van Nuys, California.[8] The helicopter was eventually sold after the show ended and became an ambulance helicopter in Germany, where it crashed in a thunderstorm and was destroyed on June 6, 1992, killing all three crew members.[9]"
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  #17  
Old 05-08-2014, 11:27 AM
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I actually like the 'high pitched scream' of a Cox TeeDee 020 at 27,000 RPM or a Tee Dee 010 at 32,000 RPM running on 30 to 40% nitro fuel. To me a screaming 2-stroke dirt bike ia a sound to behold and the gawd awful belching sound of a Harley is a sound I LOATHE.
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  #18  
Old 05-08-2014, 11:52 AM
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Quote:
Originally Posted by ghrocketman
The Cox Tee-Dee series engines are all very high performance front-rotary valve (crankshaft) induction that turn high RPM.

The PeeWee 020 is a shrunken version of the low-performance babe-bee 049.
The Pee Wee had a reed valve and attached fuel tank. They were available on a bubble pack card for $3.98 and were good for free flight models because they were cheap and ran slower than Tee Dee. If I had a fly away it wasn't as painful as losing a Tee Dee would have been. I probably still have a couple of them lying around somewhere.
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  #19  
Old 05-08-2014, 05:19 PM
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Years ago there was an Airwolf copy built and placed in a museum until the place closed down due to lack of patrons/funding. It was just a mock up and unflyable.

http://projects.airwolf.tv/ssmockup/preview.html
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