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I.C.E engines
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wilko



Joined: 25 Sep 2005
Posts: 133
Location: Ballina N.S.W


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even if u get a good gear system you'll have to slow the engine down to an idle befor u can go reverse
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Post Fri Nov 25, 2005 3:32 pm 
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Knightrous
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Joined: 15 Jun 2004
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Location: NSW


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If you have a good clutch system you don't need to, just be prepared for the violent loads stessing the rest of your drive train.
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Post Fri Nov 25, 2005 3:35 pm 
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wilko



Joined: 25 Sep 2005
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Location: Ballina N.S.W


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you'll still have to slow down good clutch or bad clutch caus if ur going full speed and try to go reverse bye bye gear box
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Post Fri Nov 25, 2005 6:46 pm 
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Glen
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Joined: 16 Jun 2004
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not neccesarily. ive seen heavyweight and super heavyweight spinners use a direct drive gear reduction. just get some large enough gears.
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Post Fri Nov 25, 2005 6:53 pm 
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Totaly_Recycled
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use belt reduction it jsut slips a litle at ful load and doest break like gears

Post Fri Nov 25, 2005 7:15 pm 
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Knightrous
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quote:
use belt reduction it jsut slips a litle at ful load and doest break like gears


Says the man who tow starts cars with his belt driven ride on mower Razz
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Post Fri Nov 25, 2005 7:24 pm 
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wilko



Joined: 25 Sep 2005
Posts: 133
Location: Ballina N.S.W


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so can u use liquid fuels or not
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Post Sat Nov 26, 2005 9:23 am 
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Knightrous
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Ask your local Event Organiser (EO) weather your allowed to. Cool
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Post Sat Nov 26, 2005 9:28 am 
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ShortsRacing
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I am looking at using a Zenoah 23cc for 12kg class. Is this going to be allowed? I have a couple here to play with as well as a few (dozen) nitro engines... I reckon the sound would really add to the atmosphere as well as the power of the bot!!!

Post Mon Mar 20, 2006 11:37 am 
 
Spockie-Tech
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Joined: 31 May 2004
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Location: Melbourne, Australia


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So far, ICE engines have not been permitted at the SideTracked venue for insurance reasons.

Its not so much the bot in the arena that worries them, but the refueling and handling of electrical machines with fuel in them in the pit area, since its an indoor, poorly ventilated space.

Besides which, I think if you look into how the bots around the world that have tried to run ICE engines have fared, I think you will find that despite the cool sound of them, they arent that effective for more than 1 or 2 big hits, then they tend to break or stall.
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Post Mon Mar 20, 2006 11:54 am 
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ShortsRacing
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quote:
Originally posted by Spockie-Tech:
... I think you will find that despite the cool sound of them, they arent that effective for more than 1 or 2 big hits, then they tend to break or stall....


That may be true but possibly that is from lack of experience with IC engines.... I come from probably the worst RC discipline for blowing engines so I would hope I would stand a good chance of keeping one going...

However if they arent permitted then electric it is....

Post Mon Mar 20, 2006 12:17 pm 
 
Waddy the phoenix



Joined: 16 Jun 2004
Posts: 971
Location: sydney


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they are permitted aslong asthe event organiser is ok with em (make sure you check before you buid it it will save you pain Smile)
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Post Mon Mar 20, 2006 1:59 pm 
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original_carnage
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Joined: 12 Jul 2004
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Location: Toowoomba(ish), travel to Brisbane


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Yup - it's all up to the event and event organiser...

..I think the main reason ICE have failed (after sussing out all ICE bots I could find) is the lack of appropiate clutch systems between the engine and its output (weapon or drives), lack of "slipper clutches" in the drive-train (or weapon drive) - to prevent stalling from seized/locked wheels/weapons and too much reliance on the horse-power of the engine to perform the desired job.

...e.g.- remember that a clutch on a brushcutter (or rc engine) is designed to enable a "idle" for the tool/rc vehicle - not to allow slip under stall conditions. I've stalled many brushcutters (by collecting a hidden strand of fencing wire for example) and rc cars can be stalled by even a small rock getting stuck between clutch-bell and chassis.

To use a rc engine (even a very grunty Zenoah) you should replace the stock clutch with a "tuneable racing" clutch - that way you can dial in a lot of slip to help prevent stalling from sudden stops. Using belt drives or a secondary clutch on the output allows the output (drive or weapon) to be stalled while letting the engine return to idle... and you can always gear down your donk to get even more torque out of it - while taking the strain off the engine..

I'm still sussing out ICE for use in my future bots too - just because it hasn't already been proven to be a success doesn't mean it can't be in the future..
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Post Wed Mar 22, 2006 10:27 am 
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Totaly_Recycled
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Joined: 15 Jun 2004
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when you build one nick i might have a go at one my self lol i have a few whipper snippers here that might do the job Very Happy

Post Wed Mar 22, 2006 9:53 pm 
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original_carnage
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Joined: 12 Jul 2004
Posts: 326
Location: Toowoomba(ish), travel to Brisbane


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Question Going to minaturize Vertex

That's about the best idea to use ICE I've seen (your multiple engage points in the weapon drive is what got me thinking in the first place)

...thought of using a 26 size methanol engine (on 30% nitro fuel) in Malice....
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Post Thu Mar 23, 2006 7:10 pm 
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