HP 61 Carb

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HP 61 Carb

Postby kjswear » Tue Oct 10, 2006 11:43 am

I was given a 25-year-old partially completed helicopter kit (a Schlueter Heli-boy) including a brand new still-in-the-box Hirtenberger Gold Cup 61F-RC which is missing its carb. I know next to nothing about RC flying, but I'm an engineer at Boeing, so I hope I can figure it out as necessary and get this thing in the air. On the phone I asked Angie to hold up on ordering a slide carb when I became concerned that there may be other hardware I should include as well. She mentioned a 'heli head'.

(1) If I need a heli head, what does it buy me? Can I live without it?
(2) I'd be grateful for any recommendations for other required parts, if there are O-rings or linkages or other piece parts I'm going to wish I had.
(3) The pile of parts I received also included a large silver ball-shaped muffler that looks like it's made to bolt on, but there are no bolt holes in this matte black engine. Can I just drill holes in the engine housing or do I have the wrong muffler?
(4) Have you got a glow plug to fit this thing?
(5) Do I need to run the engine on a bench or at idle to season it or break it in?
(6) What fuel should I be thinking about for this engine?

Any other advice or recommendations would be appreciated.
KJSwear
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Postby MECOA » Wed Oct 11, 2006 9:16 pm

(1) If I need a heli head, what does it buy me? Can I live without it?

You need the extra cooling as you do not have a prop forcing a lot of air over the engine.

(2) I'd be grateful for any recommendations for other required parts, if there are O-rings or linkages or other piece parts I'm going to wish I had.

Probably not if you are ordering a nee carb

(3) The pile of parts I received also included a large silver ball-shaped muffler that looks like it's made to bolt on, but there are no bolt holes in this matte black engine. Can I just drill holes in the engine housing or do I have the wrong muffler?

Yes you can drill and tap the engine. The USA production is drilled and tapped. They never did it in Austria.

(4) Have you got a glow plug to fit this thing?

A K&B 1L will do the trick.
http://www.mecoa.com/acc/glowplug/glowplug.htm
http://www.mecoa.com/faq/glowplug/glowplug.htm

(5) Do I need to run the engine on a bench or at idle to season it or break it in?

If it is a ringed version probably to break in. If it is an ABC maybe just for you to become familar with it.
http://www.mecoa.com/faq/abc/abc.htm

(6) What fuel should I be thinking about for this engine?

10-15% nitro with 20% oil
http://www.mecoa.com/faq/fuel/fuel.htm
MECOA
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Postby kjswear » Fri Oct 13, 2006 10:51 am

Thanks for the info.
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