axial tranny...is it tougher than it looks.

[losikid]

So i've got this axial tranny sitting here, and i had an idea.

My main question is what ratio is the tranny...if 12t pinion is on motor


The rest of the story.

In a tech math class, we have to take at the community college, we are building pvc trebuchets. Well all of the instructors weights, and such are 30lb and below, beings that other class (welding) holds this years record of ~150 ft and a 20 lb weight, we wanted to uberfy that distance. So we cut out and machined a 60lb counter weight. Problem is none of us wants to be the person to release the weight and be standing next to it when i falls and flings a golf ball somewhere.

So i've came up with a way for a quick release mechanism (un tested), so that solves our biggest problem. But still 60lbs in 210 cubic inches feels real heavy, and not the funnest thing to lift repeatedly.

So i got to thinking, why not use this axial tranny i have, and see if it'll lift 60lbs preferably with a integy 55t. It'll only have to pull a few inches of string.

If anything i can always rig up some sort of pulley to increase the mechanical advantage, but i'm hoping the axial tranny has the balls to handle 60 lb, and its ratio is low enough the integy 55 can lift it.

[Brandon]

Your over complicating a simple project. K.I.S.S.

[WIDELOAD]

Sounds like a wicked little plan Losi Kid.

As for the answer to you question. Axial trans is 2.6:1 with 87/12 gearing is works out to a total reduction of: 18.85:1

Have fun mate.

[country_crawler]

Aint no doubt about it. I've pulled 4 1/8 nitro cars full RTR, and one tonka truck full of rocks. It held up. So I say go for it.

[losikid]

Originally Posted by Brandon

Your over complicating a simple project. K.I.S.S.

I always do Make it better or go home

Plus it'll be cool, Not that it'll hurt us to lift 60 lbs quite afew time to hook up the relaese trigger, juts be cool to watch alittle motor pick up 60 lb with the flip of a switch.

Originally Posted by WIDELOAD

Sounds like a wicked little plan Losi Kid.

As for the answer to you question. Axial trans is 2.6:1 with 87/12 gearing is works out to a total reduction of: 18.85:1

Have fun mate.

Thanks

[Reflection]

Originally Posted by Brandon

Your over complicating a simple project. K.I.S.S.

I would agree.....


The Axial tranny is pretty dang stout once it's beefed up. In 99% of most 2.2 class trucks, what it was designed for, it's strong enough and does great. I've got a couple beefed up Axial trannies I've run in super class trucks that have held up extremely well.

That much weight though, if you insist on complicating things, I'd look into a little chain drive or something.

[losikid]

still trying to come up with a way to put some sort of spool on the tranny outputs so i can wind up the wire/string/rope...we're launching Thursday, won't be in the shop tomorrow so i can't make one.

[losikid]

Originally Posted by Reflection

I would agree.....


The Axial tranny is pretty dang stout once it's beefed up. In 99% of most 2.2 class trucks, what it was designed for, it's strong enough and does great. I've got a couple beefed up Axial trannies I've run in super class trucks that have held up extremely well.

That much weight though, if you insist on complicating things, I'd look into a little chain drive or something.

bone stock tranny from a orange artr kit 2 years ago

[losikid]

Maybe i'll yank off one my losi axles...hmmm probably rear axle use a wheel for a spool, 12t pinion, i'm sure it be lower than 50:1

[Reflection]

Had to dig for this picture, little old. Notice the sub C cells, receiver pack and all?

Here's a tranny that'd handle it.

[losikid]

well, i didn't really have a small A frame to experiment with, so i got the treb sitting on the bottom bed of a bunk bend, and using the rail above to act as a pulley...so i wrapped string around enough time around it to where i believe i have a 5:1 mechanical advantage...which seems about the right amount weight, just by pulling hand, for little 540 motor can handle...so now i gotta figure out how to implement a pulley system into my treb. I have an idea to try and use the same frame i have sketched out for our quick release

Oh for those wondering this treb was built with a 10 ft stick of pvc, probably 18" tall, 18" long, 12" wide. so 60 lb is insane

I'll be off to hardware store tomorrow for some pvc and fittings, to build the trigger and pulley frames...still unsure where i'm gonna mount the tranny or axle, but i'll have it figured out before the end of the night...what a great way to spend the night before ACT's huh

[losikid]

Originally Posted by Reflection

Had to dig for this picture, little old. Notice the sub C cells, receiver pack and all?

Here's a tranny that'd handle it.

Thats pretty awesome, chain driven rc. What is it in???

[Reflection]

Originally Posted by losikid

Thats pretty awesome, chain driven rc. What is it in???

It's basically the guts out of a Twin Force tranny.

[eric113]

Originally Posted by Reflection

It's basically the guts out of a Twin Force tranny.

2004 called they want their sub C and rx packs back.

[Reflection]

Originally Posted by eric113

2004 called they want their sub C and rx packs back.

I let the answering machine get it.

[losikid]

i can't get my semi pulley system to operate correctly...i got another idea though, if it don't work a pulley system will need to be machined out...it won't be done this year of course, but i got next year too

[losikid]

Well, during launching on thrusday i'll be using a my rear losi axle for the pulley motor...they i'll get a part machine out that extends the output chaft and allows a hex to be installed, which will allow a wheel to mount to it.

The way i'm designing it, it'll be perfectly usable with or without the pulley setup...but all components will still be there.

I'll get some pics up tomorrow night once i have it all done...i'll try and get video while launching.

Well 9 o' clock has came, time to sleep so i can go take the ACT tomorrow i think trebuchet r&d is perfect thing to be doing the night before

[tom@vp]

ah nm miss read...