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All Forums >> Glow Engines, Gas Engines, Fuel & Mfg Support Forums >> Engine Manufacturers Direct Support Forum >> Fuji-Imvac Engines Support >> US41 - more power available?
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US41 - more power available? - 4/8/2002 4:12:26 AM   
Phil Heller



Posts: 467
Joined: 2/3/2002
From: Sacramento, CA, USA
Status: offline 		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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AMA8065 since 1945
Real Airplanes have four round engines and a tail gunner!
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US41 - more power available? - 4/8/2002 4:57:54 PM   
amcross



Posts: 2644
Joined: 1/8/2002
From: Tuscola, IL, USA
Status: offline 		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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Sincerely,
Mrs AnnMarie Cross
Owner, Cross Winds Stables and Equine Rescue, Inc.
an Illinois 501c3 nonprofit charity corporation

(in reply to Phil Heller)
       Post #: 2

US41 - more power available? - 4/8/2002 7:29:14 PM   
Phil Heller



Posts: 467
Joined: 2/3/2002
From: Sacramento, CA, USA
Status: offline 		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

_____________________________

AMA8065 since 1945
Real Airplanes have four round engines and a tail gunner!

(in reply to Phil Heller)
       Post #: 3

US41 - more power available? - 5/17/2002 3:41:35 AM   
Phil Heller



Posts: 467
Joined: 2/3/2002
From: Sacramento, CA, USA
Status: offline 		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.

_____________________________

AMA8065 since 1945
Real Airplanes have four round engines and a tail gunner!

(in reply to Phil Heller)
       Post #: 4

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All Forums >> Glow Engines, Gas Engines, Fuel & Mfg Support Forums >> Engine Manufacturers Direct Support Forum >> Fuji-Imvac Engines Support >> US41 - more power available?
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