US41 - more power available? (Full Version)

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Phil Heller -> US41 - more power available? (4/8/2002 4:12:26 AM) Dear Ann Marie I appreciate your time and interest in providing answers in this column. It shows your interest is in helping modelers and not just in selling product. I have an "old style " US41,(needle valves facing forward) in a 17lb. G-Shark. It flies it adequately but I would like a bit more power. I have a walbro 144 carb that I installed and tested with no apparent improvement. Just purchased a B&B muffler that should let it breath better, tho louder!, and I'm wondering if you have any other suggestions before I yank it out and install my Q52?

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amcross -> US41 - more power available? (4/8/2002 4:57:54 PM) Sorry, Phil, not really. the us41 is a nice inexpensive entry level gasoline engine, but it is not a powerhouse. What are you spinning for a prop? are you loking for more vertical? more speed? or more overall power? Sincerely, Mrs. AnnMarie Cross Senior Manager, Proprietary Services and Support Great Planes Model Distributors [email]productsupport@greatplanes.com[/email] [url]www.greatplanes.com[/url] [url]www.bestrc.com[/url] NO AUTORESPONDER

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Phil Heller -> US41 - more power available? (4/8/2002 7:29:14 PM) Dear AnnMarie Thank you for your reply. I am pleased with the user-friendliness of the US41 but would like a bit more power. I am currently swinging an 18-10 Pro Zinger at 7100RPM, which I understand is about the norm for this engine. I will install the new carb along with the B&B muffler and see if the combo does any better. Reports are 3-400 more RPM, but seeing is believing! I will keep you posted. Phil Heller

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Phil Heller -> US41 - more power available? (5/17/2002 3:41:35 AM) Installed the Walbro 144 Carb and B&B muffler. Picked up 200 RPM. I am still running 4OZ per Gallon break-in fuel, should pick up a bit more going to 50-1 fuel. total investment including carb, modifications and muffler about $100. Not really worth the effort as I can hardly tell the difference in performance - time will tell.

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