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10 hp gear ratios
Posted by: Gary Hoonsbeen (IP Logged)
Date: November 20, 2005 04:57PM
<HTML>I have four 10 hp engines, all with the smaller 3 inch bore. Three of these have 40 tooth gears on the engine.
The EX and E2 Stanley, according to Pat Farrell's data, should have a 48 tooth engine gear and a 79 tooth axle gear, yielding a ratio of 1:612. My rear axle does have the 79 tooth rear axle gear.
Using the 40 tooth engine with the 79 tooth axle gear yields a ratio of 1.975:1. Looking through the Farrell chart I do not find a single model listed with the 40/79 tooth arrangement. In fact, those engines with 40 tooth gears are found on the Stanley's shown below. Listed also are the rear axle gear:
1908-Z 40/70
1911-62 40/56
1910-61 40/56
1910-60 40/56
1909-Z 40/70
1906-DX 40/80
1906-EX 40/80
1905-DX 40/80
1905-E 40/80
It would seem to me that the later models Z, 60, 61 and 62 would have used the larger 3-1/4 inch bore 10 HP engine, while my four engines are all 3 inch bore. When did the larger bore 10 HP engines go into machines? Would this mean all three engines are from the 05, 06, 08 listed above?
Of course I have no way of knowing if the 79 tooth gear I have and the 40 tooth engine came together that way from the factory as the car was somewhat a basket case. Comments anyone?
Second problem. My forth engine is the same 3 inch bore and the design is exactly the same as the other three, but it has a 56 tooth gear on the engine. Those of you who have worked on the Stanley engine know of the difficulties of changing this gear and this engine is ORIGINAL. It is very dirty and caked with old grease. If I attach my 79 tooth rear axle to the engine, the alignment of the axle clamps is perfect. The ratio of the 56 to 79 tooth is 1.407:1. This would make it a very nice slow running engine when compared to road speed. But I do not see a single Stanley which used a 56 tooth engine gear. Although the 40 tooth engine and 56 tooth axle gear used on the models 60, 61 and 62 would have the same 1.4:1 ratio.
Is there an answer to this 56 tooth engine gear mystery?
Gary
Would th</HTML>
The EX and E2 Stanley, according to Pat Farrell's data, should have a 48 tooth engine gear and a 79 tooth axle gear, yielding a ratio of 1:612. My rear axle does have the 79 tooth rear axle gear.
Using the 40 tooth engine with the 79 tooth axle gear yields a ratio of 1.975:1. Looking through the Farrell chart I do not find a single model listed with the 40/79 tooth arrangement. In fact, those engines with 40 tooth gears are found on the Stanley's shown below. Listed also are the rear axle gear:
1908-Z 40/70
1911-62 40/56
1910-61 40/56
1910-60 40/56
1909-Z 40/70
1906-DX 40/80
1906-EX 40/80
1905-DX 40/80
1905-E 40/80
It would seem to me that the later models Z, 60, 61 and 62 would have used the larger 3-1/4 inch bore 10 HP engine, while my four engines are all 3 inch bore. When did the larger bore 10 HP engines go into machines? Would this mean all three engines are from the 05, 06, 08 listed above?
Of course I have no way of knowing if the 79 tooth gear I have and the 40 tooth engine came together that way from the factory as the car was somewhat a basket case. Comments anyone?
Second problem. My forth engine is the same 3 inch bore and the design is exactly the same as the other three, but it has a 56 tooth gear on the engine. Those of you who have worked on the Stanley engine know of the difficulties of changing this gear and this engine is ORIGINAL. It is very dirty and caked with old grease. If I attach my 79 tooth rear axle to the engine, the alignment of the axle clamps is perfect. The ratio of the 56 to 79 tooth is 1.407:1. This would make it a very nice slow running engine when compared to road speed. But I do not see a single Stanley which used a 56 tooth engine gear. Although the 40 tooth engine and 56 tooth axle gear used on the models 60, 61 and 62 would have the same 1.4:1 ratio.
Is there an answer to this 56 tooth engine gear mystery?
Gary
Would th</HTML>
Re: 10 hp gear ratios
Posted by: Ben in Maine (IP Logged)
Date: November 20, 2005 05:50PM
<HTML>OOOps,,,,The K,, M,, Z engines,,, are # 4 engines in the list of things are 30 HP the early so called narrow frame 4 1/2 X 6 1/2 ,,, The K was geared 66engine /54 axle,,, so engine [un] balence is at min' ,,, hahah Ben ,,,</HTML>
Re: 10 hp gear ratios
Posted by: Gary Hoonsbeen (IP Logged)
Date: November 20, 2005 07:07PM
<HTML>Ben In Maine
Please send me you phone number. I need to get some clarification if you don't mind.
Gary</HTML>
Please send me you phone number. I need to get some clarification if you don't mind.
Gary</HTML>
Re: 10 hp gear ratios
Posted by: Jim Alves (IP Logged)
Date: February 28, 2006 10:43AM
<HTML>You lucky fellow. Some of us just dream of dealing with "original" parts/cars/etc.
Louis Ross had/used nearly 1 to 1-1/3 gear ratio on his early (1904-'06) racers. The 1906 Gentleman's speedy roadster's engine used a 56 tooth gear, too (See SMCC records- also mentioned in Kit West's book). Sounds like the "odd-ball" you have, is a runabout/racer "dry"engine. [These didn't have the later "oil-bath" - crossheads/valve gear/rods separated/baffled from the cylinders.] You had to stop and relubricate/oil-up every 25 miles or so. Just remember that they weren't run at the later, higher pressures. The maximum is about 425psig. for the 10hp. of that period. With a 60 tooth or even a 79 tooth gear on the back axle, the pumps/mechanicals will be much quieter than the usual ones. But, keep it out of a big heavy bodied car.
The copy of Light Steam Power's drawing I have of the later engine (3-1/4" x 4-1/4") isn't too detailed. I hope you'll make some notes and "numbers" available for the rest of us.
Regards-
JWA Darklighter out.</HTML>
Louis Ross had/used nearly 1 to 1-1/3 gear ratio on his early (1904-'06) racers. The 1906 Gentleman's speedy roadster's engine used a 56 tooth gear, too (See SMCC records- also mentioned in Kit West's book). Sounds like the "odd-ball" you have, is a runabout/racer "dry"engine. [These didn't have the later "oil-bath" - crossheads/valve gear/rods separated/baffled from the cylinders.] You had to stop and relubricate/oil-up every 25 miles or so. Just remember that they weren't run at the later, higher pressures. The maximum is about 425psig. for the 10hp. of that period. With a 60 tooth or even a 79 tooth gear on the back axle, the pumps/mechanicals will be much quieter than the usual ones. But, keep it out of a big heavy bodied car.
The copy of Light Steam Power's drawing I have of the later engine (3-1/4" x 4-1/4") isn't too detailed. I hope you'll make some notes and "numbers" available for the rest of us.
Regards-
JWA Darklighter out.</HTML>
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