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US 41 Power and tach readings

Old 10-22-2006, 07:33 AM
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fireman7875
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Default US 41 Power and tach readings

I am new to gas engines so I am not familiar with their power output. I have a US 41 and yesterday I took some tach measurements. With an 18x10 Zinger I got about 6900 at the top end and an idle of 1600 rpm. Does this sound right? I would like to know if it is producing the power it should. Also, I noticed there is a baffle in the muffler. Will I get more power by removing it or switching to a different muffler?

Thanks,
Brian
Old 10-24-2006, 06:14 PM
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fireman7875
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Default RE: US 41 Power and tach readings

Moderator, could you please move this thread to the gas engine discussion forum?

Thank you
Old 01-20-2007, 05:10 PM
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Phil Heller
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Default RE: US 41 Power and tach readings

Hi Brian,

For a new engine those figures are right on with the prop you are using. After about 3-4 gallons of fuel you should be turning around 7200. You can pick up a couple hundred more RPM by switching to a Q-52 Carb (Walbro 144) and a B&B muffler. Mine turns an 18-10 ProZinger at 7450 and yanks my 15LB G-Shark around pretty well! Not a 3D Demon but lots of fun! Check it out at http://www.quiknet.com/~pheller

Phil
Old 03-26-2007, 12:32 PM
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delta duster
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Default RE: US 41 Power and tach readings

does anyone have a us 41 that still has a good cylinder head mine was in a wreck and it broke the carb attach area into or any onfo at where to order parts
Bobby
[email protected]
Old 04-22-2007, 01:35 PM
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jaysonb
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Default RE: US 41 Power and tach readings

Hi, I also had a quadra 42 that ws in a crash, and half of the carb mounting flange broke off. I took it to a local welder, and he used a heli-arc welder and welded it back on, and now it works as good as new, and only cost me 20 bucks!!! I was glad to have it fixed, as the engine only had about 5 flights on it when it crashed. Hope this helps.
Old 06-29-2007, 11:14 PM
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naefha
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Default RE: US 41 Power and tach readings

Check out also the home page
www.usqaero.com
and email to [email protected] with part needs.
We have a lot of parts in stock.

Thanks!!
Old 09-29-2007, 05:05 PM
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boothg-3
 
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Default RE: US 41 Power and tach readings

search for B&B specialties , or bennett built , he has parts the us41 and quadra 42 are the same engine

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