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HelicopterAntiques or Out of Business › GMP cricket overheating
10-20-2004 12:16 PM  13 years agoPost 1
Jon Chmielowski

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Hey fellows

Does anybody have some simple or good ways to cool the original cricket helicopter, as mine still gets hot and looses power is the warm summer months when its actually comfortable to fly. I have the O.S. .28 heli engine and use 15% nitro by Byron fuels, I always run the heli a little on the rich side but still gets warm and settles back to earth, any ideas guys as I know the 300c conversion kit back in the days actually had a cooling fan of some kind and would anyone know where to get one?? Thanks Jon.

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11-17-2004 07:56 PM  13 years agoPost 2
helicoptermedic

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Poughkeepsie, NY

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GMP Cricket overheating

This was a common problem back in the day. Without seeing your helicopter's set-up, I wouldn't know if your heli is flying as efficient as possible. You have several options. Upgrade to OS 32H engine, find the fan & shroud kit that was made for the GMP Cricket Custom.

Good Luck

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11-18-2004 07:22 PM  13 years agoPost 3
Loc-Nar

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The Basin

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cricket overheating

There is a forced air conversion available for the cricket. Of course it is hard to find parts for it. I machined the regular head down, polished it's top surface, and fit a r/c car head heatsink to it. Maybe on Monday i can post a picture. It keeps things cool.

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12-15-2004 10:09 PM  12 years agoPost 4
kitfoxflier

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Houston, TX

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Hey wecoyote,

Is there any way I could get a pic (or two) from you with some detail on the cooling unit? I have an old Cricket I'm dusting off to try to get it back in the air and cooling was the biggest prob I used to have.

BTW, does anyone know of any places to get any parts anymore? I'm sure I'm in need of some blades...

TIA,

Ted

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01-03-2005 09:42 PM  12 years agoPost 5
Loc-Nar

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The Basin

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Happy Monday

Posted pics in my gallery.

As far as blades go I still have a good set but I would like to hang on to them. I am currently flying a set of blades JR makes (for what heli I have no idea) and they are semi symetrical. I just cut them down to size and put a little more pitch on the mains. You could use semis but you may need more pitch. It was hard to get the mounting holes just right and I am sure they are not perfect. If they are bolted to the head with 2 bolts (head side) the thing shakes like crazy. If one bolt is used (lead-lag hinge) the thing flys as good as a Cricket could, which isn't saying much. Just find a small blade and chop it down.

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01-04-2005 05:12 AM  12 years agoPost 6
TMoore

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Cookeville, TN

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Here are a few tips for you:

1. Get rid of the Byron fuel and go to CP or Magnum. Either of the latter fuels will have plenty of lube and you can still run the engine rich.
2. Set the pitch on the main blades so the machine lifts off at 3/4 stick and engine should be screaming pretty good. A lot of pitch makes the little 28 run hot. You want headspeed here.
3. Upgrade to a 32. They are cheap right now and work well.
4. Make your own blades. Glue balsa and basswood together and use a drum sander mounted in a variable speed router table or in a drill press to shape the leading edge and trailing edge. They are Clark Y flat bottoms anyway.

When I use to be a GMP dealer we made our own blades for demo purposes and John was never the wiser. The little Crickets would honk if the headspeed was up there where it needed to be.

TM

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01-04-2005 10:01 AM  12 years agoPost 7
Loc-Nar

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The Basin

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Headspeed

I wonder if a higher speed would help the tail hold a little better during throttle changes? I have noticed that if I am at max throttle and I am making a turn somethmes the tail gets "funny", as well as with a powered acent. Maybe I am running too much pitch.

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