Victor Boocock and his 1914 HD are at it again !!

[fillibuster]

Great stuff, that video! Best-watched over 2nd cup of coffee early a.m.!
I need 6 details to calculate your rpm correctly, within small margin of error:
engine (driver) sprocket # of teeth
driven sprocket # of teeth
output sprocket # of teeth
wheel sprocket # of teeth
rear tire diameter, or circumference
# of seconds to do the mile, at speed, should be on a flat, using mile markers such as on the interstates. An escort's speedo report will do as well, if you trust the report!

An incorrect report on # of teeth would yield far greater error than an inch or two on the circumference. Circumference is best measured with a tape spool that has a flat tape, such as in a cheap 50' tape. You would secure the end and every 10 inches or so to the tire until full revolution is done.

[Slojo]

http://www.advanced-ev.com/Calculators/TireSize/

This will help with speed / RPM calculations.

My 1914 is geared to 4.074 / 1 at 90 MPH it is turning 4500 RPM.

Victors numbers are good in his following example.

"Gearing is -- (35 X 44) divided by (14 X 27) = 4.074"

WHERE

35 = Outer counter shaft sprocket on pedal crank assembly.

44 = Rear wheel sprocket

14 = Engine sprocket

27 = Inner counter shaft sprocket on pedal crank assembly.

35 X 44 / 14 X 27 = 1540 / 378 = 4.074 / 1 Victors final gear ratio. This combination equals 55 MPH at approximately 2748 RPM with his current wheels, about 86 inch coircumfrence.

joe

[fillibuster]

http://www.advanced-ev.com/Calculators/TireSize/

This will help with speed / RPM calculations.

My 1914 is geared to 4.074 / 1 at 90 MPH it is turning 4500 RPM.

Victors numbers are good in his following example.

"Gearing is -- (35 X 44) divided by (14 X 27) = 4.074"

WHERE

35 = Outer counter shaft sprocket on pedal crank assembly.

44 = Rear wheel sprocket

14 = Engine sprocket

27 = Inner counter shaft sprocket on pedal crank assembly.

35 X 44 / 14 X 27 = 1540 / 378 = 4.074 / 1 Victors final gear ratio. This combination equals 55 MPH at approximately 2748 RPM with his current wheels, about 86 inch coircumfrence.

joe

Check!!
Thanks Joe! Had to get those missing links answered, primarily the circumference.
My method multiplies the separate ratio's of each pair of sprockets (on same chain) times each other to get engine rev's per wheel rev.
But I had to invert your combinations to get your ratio. (I don't own a single speed 14 HD) The 14t chained to 35t (35 div by 14) =2.5 ratio
the 27t chained to rear wheel 44t (44 div by 27) = 1.62 ratio .. 2.5 x 1.62 = 4.05

I had not multiplied the drivens, and divided by the product of the drivers, as you did. I usually treat each ratio separately, as I would in my chief, since primary is constant, while output can be varied. Decimals account for the discrepancy between 4.05 and your 4.071 ...... maybe it's an Indian thing, okay?? (smiley smart-aleck emoticon, here!)

But just to be sure, your 14t engine sprocket is chained to the 35t, and the 27t "inner.." drives the 44t wheel sprocket, ...... correct?
The driver and the driven in each combination determine which figures are in the numerator or denominator.....

My chief w/sidecar and 23t output sprocket goes ( 24 motor 52 clutch, and 23 output 43 wheel) 52x43 div by 24x23 equals 2236/552 =4.05 ...
times 760.5 (revs/mile of rear tire) = 3,080 rpm

[Slojo]

"But just to be sure, your 14t engine sprocket is chained to the 35t ("outer") , and the 27t "inner.." drives the 44t wheel sprocket, ...... correct?"

Yes that would be the proper order of events. Without taking the cover of and counting the teeth I am nearly certain the tooth count is as stated .

joe

[fillibuster]

"But just to be sure, your 14t engine sprocket is chained to the 35t ("outer") , and the 27t "inner.." drives the 44t wheel sprocket, ...... correct?"

Yes that would be the proper order of events. Without taking the cover of and counting the teeth I am nearly certain the tooth count is as stated .

joe

thx Joe.
I do a lot of work with product flow in conveyor systems, drive components, belt speeds, horsepower demands. But this exercise really brings me back to matching up the gears on the old flat-belt-drive south bend lathe, for thread cutting, tpi, with a slide rule, before the push-button age. .... Gray hair here!

[10E]

Joe
Phewwww --Thanks for stepping in, I thought I was in trouble for minute. Was going to say something silly--- "how fast does a conveyor system go down the road" type thing. I do enjoy the minutia of these old bikes Phillybuster, its just that I'm struggling to get the basic story on the forum ( due to having a good time doing other things) I hope you saw my global positioning devise (2 of them) on the handlebars which I think can give me a lot of information, ( but not rpm) probably more than I need.
I will read your remarks with great interest
There is still more to come, along with the photos. ( thanks to Cory)
I know there is a wringing of hands and gnashing of teeth going on in the older bike community due to "the Cannonball Run" in 2014.
Know theres something to get your teeth into. ( pun intended)
more soon

Victor

[c.o.]

[fillibuster]

Cool graph, Cory!
Now where's Joe??!!
Joe, Give us a short school (or "page" out of your "build" thread, maybe) for the tricks that extend that torque curve for the "high duty" HD.
Porting and camming? higher flow in the carb?
and when do you improve the lower end, rods, mains, etc?
I love tuition-free schools!

[fillibuster]

Joe
Phewwww --Thanks for stepping in, I thought I was in trouble for minute. Was going to say something silly--- "how fast does a conveyor system go down the road" type thing. I do enjoy the minutia of these old bikes Phillybuster, its just that I'm struggling to get the basic story on the forum ( due to having a good time doing other things) I hope you saw my global positioning devise (2 of them) on the handlebars which I think can give me a lot of information, ( but not rpm) probably more than I need.
I will read your remarks with great interest
There is still more to come, along with the photos. ( thanks to Cory)
I know there is a wringing of hands and gnashing of teeth going on in the older bike community due to "the Cannonball Run" in 2014.
Know theres something to get your teeth into. ( pun intended)
more soon

Victor

Victor!
We're all so very lucky when you guys share your experiences!
That push-button gear on your handlebars is probably where the young heads are hanging out, now, but there are still those that think in terms of gears and iron in motion. Without the wheel, things just wouldn't be........

[10E]

Phillibuster
Yes, right on, where would we be without "the wheel" it would be a very different world.
An amusing anecdote, after a 450 mile day from Gunnison Co. pulled into Delta, Utah. at 6.00pm, population 3,500, was told all rooms booked due to a mini monster truck show at the local fair grounds. Was going to sleep in the park or what ever until the motel guy said try this number. I called, room available, $45.00 a night, I thought and thought and said ok. It was a 40/50s style in the middle of town, a little shaky looking. As I'm checking in I notice a sign on a side door saying " Please respect the residents" at that point an elderly gentleman comes through the door and marches right up to me in a boxing stance and say in all seriousness " you wana fight" I quickly learned that half of the motel was a nursing home and this was obviously one of the residents.
In a outward nice calm voice I said "the fights tomorrow night" he turned and left with his son who was taking him outside to have a smoke.
I went to my room (defiantly 50s or earlier style) to find no soap in in the bathroom, when I asked the clerk for soap she said in a tentative voice "I don't know, the cleaning staff have gone home but I have a key to supplies let me check." After 5 mins she came back and said " you are very lucky I've found a bar of soap" Inside I'm cracking up, this is the real live Fawlty Towers experience.
They were really nice people, they said put your bike in the residents fenced off garden, with that, I volunteered to give their residents a little talk about my experiences riding across the USA. She said that would be great idea, but by then it was 6.45pm and she said the residents would be all medicated and would just fall a sleep on me, but please , she said, let us know when you are coming through town again and we will arrange a talk for the residents.
You never forget these type of experiences. Salt of the earth.
More to come
Victor

[c.o.]

Harley in nursing/motel garden for the night


Gassing up at Utah / Nevada border

[T. Cotten]

Victor!

There was at least one "harley-rider" in every locked ward I ever visited.

Looking forward to more,

....Cotten

[Slojo]

Phillibuster

Effective Torque, leverage on the crank pin enhanced by efficient combustion process by way of high velocity air flow at lower RPM. Horse Power, a factor of torque and RPM. RPM's are limited primarily by piston speed (physics / mechanics) and the ability to flow volume of air at those high RPM's. A venturi increases air velocity at lower RPM's yet restricts flow at higher RPM's. Fuel injection does not require a venturi because fuel injection does not need the velocity at low RPM's to siphon fuel from the float bowl. The Ghost my 1914 at high speed hums in the range where torque curve crosses the Horse Power curve. The Ghost relies on Torque to handle the small stuff (Hendersons).

joe

[Slojo]

Victor!
Joe
Phewwww --Thanks for stepping in, I thought I was in trouble for minute. Was going to say something silly--- "how fast does a conveyor system go down the road" type thing......

Victor

Very funny...I guess the conveyor system will run between 55 to 75 MPH while on a truck and or a trailer.

joe

[fillibuster]

Victor

Very funny...I guess the conveyour system will run between 55 to 75 MPH while on a truck and or a trailer.

joe

Depending on the material, some components would outrun your 14, ... but it is funny, I'll be a sport.