Time to build a new trail bomber

[ebinmaine 67,605]

Holy Overdrive Batman!!!

 

Whatsya pulley sizes there mistah??

[Greentored 3,214]

12 minutes ago, ebinmaine said:

Holy Overdrive Batman!!!

 

Whatsya pulley sizes there mistah??

8/4. It’s a little much, will probably drop to a 6 up front. It’ll run a good 5mph in low range 3 haha. 
Id leave it and just run in lower gears on trails and save high 3 for the occasional blast, but can’t help but think of that poor input shaft zinging almost 3x the engine speed haha. I want this thing to last! 

[8ntruck 7,016]

On 12/19/2020 at 9:30 PM, Greentored said:

Got some bills to pay and need to move some Horse inventory, but raided the parts and made a little progress. Going to run a C gas tank out back in tandem with the B tank. 
 No 30mph wheelie machine this time ha, going more for a 15-18mph utility machine. Pretty sure it’s gonna be Kohler powered since I have somehow acquired a stack of K301s. 
Since it started as a B100, think I’ll name it the B-1 bomber! 

 

Going to build yourself a bone then.

[Greentored 3,214]

Update: first shakedown woods run! 

[Greentored 3,214]

[ebinmaine 67,605]

VERY nice

[Greentored 3,214]

10 hours ago, ebinmaine said:

VERY nice

Thanks buddy! Still plenty to do- theres a lot of masking tape and zip ties holding things they shouldn't ha.

OH- and went to a 5" on the trans, so 8/5- MUCH better. Low range is still relatively 'crawling', and maybe 15-16mph flat out in high. Plenty.

[Greentored 3,214]

deleted post- wrong thread

Edited January 23, 2021 by Greentored

[AHS 1,440]

24 minutes ago, Greentored said:

Thanks buddy! Still plenty to do- theres a lot of masking tape and zip ties holding things they shouldn't ha.

OH- and went to a 5" on the trans, so 8/5- MUCH better. Low range is still relatively 'crawling', and maybe 15-16mph flat out in high. Plenty.

Holy! 15-16 mph! That’s plenty fast for as wide as it is!

[ebinmaine 67,605]

25 minutes ago, Greentored said:

Thanks buddy! Still plenty to do- theres a lot of masking tape and zip ties holding things they shouldn't ha.

OH- and went to a 5" on the trans, so 8/5- MUCH better. Low range is still relatively 'crawling', and maybe 15-16mph flat out in high. Plenty.

I have a pulley math site saved on the PC. 

I need to figure out what to do for Colossus. 

I have a 3.5" (I think) engine pulley. 

Transmission pulley on it right now is waaaay too small. 

 

Might take some experimentation. 

[Greentored 3,214]

On 1/23/2021 at 8:16 AM, ebinmaine said:

I have a pulley math site saved on the PC. 

I need to figure out what to do for Colossus. 

I have a 3.5" (I think) engine pulley. 

Transmission pulley on it right now is waaaay too small. 

 

Might take some experimentation. 

1:1 pulley ratio is real nice for a worker and enough speed to have a little fun- maybe 8-9mph with a 23" tire. Thats where I ended up on Hoss (5/5) and really like it!

I scribbled down a quick 'calculator'- if you can decipher this its pretty close.

Divide engine pulley by trans pulley, multiply by engine rpm. This is trans input speed.

Divide that number by 24.6 = axle rpm

Divide that number by 88 (axle rpm required for 6mph)

Multiply that number by 6 = speed

this is for 23" tires. For taller tires, divide by 23, multiply that number by your speed calculation.

 

Example: 8/5 pulleys on the B-1, 3000 engine rpm (still farting around with governor and throttle).

8/5= 1.6.  x 3000rpm = 4800 input rpm

4800/24.6= 195 axle rpm

195/88 = 2.21

2.21 x 6 = 13.2mph.  The B-1 runs 13mph on phone gps.

[Pullstart 62,911]

Looks like ya found a sapling or four Scott 

[ebinmaine 67,605]

10 hours ago, Greentored said:

1:1 pulley ratio is real nice for a worker and enough speed to have a little fun- maybe 8-9mph with a 23" tire. Thats where I ended up on Hoss (5/5) and really like it!

I scribbled down a quick 'calculator'- if you can decipher this its pretty close.

Divide engine pulley by trans pulley, multiply by engine rpm. This is trans input speed.

Divide that number by 24.6 = axle rpm

Divide that number by 88 (axle rpm required for 6mph)

Multiply that number by 6 = speed

this is for 23" tires. For taller tires, divide by 23, multiply that number by your speed calculation.

 

Example: 8/5 pulleys on the B-1, 3000 engine rpm (still farting around with governor and throttle).

8/5= 1.6.  x 3000rpm = 4800 input rpm

4800/24.6= 195 axle rpm

195/88 = 2.21

2.21 x 6 = 13.2mph.  The B-1 runs 13mph on phone gps.

If I use that formula I should be around 9 or 10 MPH wide open. 

 

That's plenty fast. 

 

I'll set a minute sometime and figure what's what...

[tom2p 2,394]

On 1/22/2021 at 8:42 PM, Greentored said:

Update: first shakedown woods run! 

my kind of fun !  we did this often at one time

 

sometimes with a small farm tractor first and me following with a Wheel Horse 704 

 

front part of the 704 hood a little beat up - but took a lickin and kept on tickin !

 

[Greentored 3,214]

On 1/25/2021 at 6:13 PM, pullstart said:

Looks like ya found a sapling or four Scott 

Making my own new trails!   So far I've found 1.5" dia is the 'live sapling cutoff'- anything under, run it down. Anything over, its gonna climb it first, then MAYBE continue over it.

Brush guard coming next ha.

[Greentored 3,214]

More updates: made some linkage and hooked the brakes up to the deck lift arm, fabbed up a dual throttle setup (dash and foot) and threw some 19x7 and 26x9 atv tires on. This thing is a beast! 

[ebinmaine 67,605]

I like it!!

[Pullstart 62,911]

I think you need an Arsenal of trail bombers... for when Horse Fellers visit!

[OldWorkHorse 3,045]

9 hours ago, Greentored said:

More updates:

 

What is the speed on sumthing like this and pully sizes ur running? I'm building somthing like this and just trying to see what pulleys work well for people. 

[Greentored 3,214]

1 hour ago, OldWorkHorse said:

What is the speed on sumthing like this and pully sizes ur running? I'm building somthing like this and just trying to see what pulleys work well for people. 

I have an 8 on the engine and 5 on the trans, it runs 16mph on gps with the 26” tires, at 3000 rpms. 7/5 seems to be the standard for the guys trail running Horses. You can run a smaller trans pulley but they can slip if you get into mud or water👍

[Greentored 3,214]

The B-1 went on it’s first group ride on Saturday! Fouled a plug, followed by a ‘not charging’ issue which was a loose connection at the regulator. Replaced the plug, then later shorted one of the wires and killed the regulator. Threw a new battery in and rode the rest of the day without a hiccup! 
Stay tuned- there’s a lot more to come on the ol bomb. 

[Greentored 3,214]

We love our horses best but respect these other bombers too. That yellow machine is an animal, powered by a fully built, 5000rpm K341, making close to 30hp! 

[ebinmaine 67,605]

I think it's awesome that you folks put time and energy into older machines and go out and play.

Good old heavy American iron that will last.

[slim67 2,735]

6 hours ago, Greentored said:

We love our horses best but respect these other bombers too. That yellow machine is an animal, powered by a fully built, 5000rpm K341, making close to 30hp! 

Is that mister studabaker? if so , its definitely bad ass.

[19richie66 17,508]

Looks like his machine.👍