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Alloy Monster MKIII

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Old 06-23-2012, 03:16 PM
  #51
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Default RE: Alloy Monster MKIII

Ooooo.... you reckon? [X(]

Less contact surface......


I'll try.
I've got a couple of spare sets of shoes laying around.


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Old 06-23-2012, 07:29 PM
  #52
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Default RE: Alloy Monster MKIII

Hmm that didn't work real well....

Not sure if I took too much weight off.
Back to the drawingboard for plan B and C.





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Old 06-23-2012, 11:22 PM
  #53
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Default RE: Alloy Monster MKIII

Well I've been mucking around with clutch shoes and different springs most of the day and I don't think I've really achieved anything

So I took the car for a quick bash in the park out the back and gave it a good thrashing.

Rolled it twice, busted one tyre and the exhaust almost fell off.
Goes pretty well but I'm thinking of sticking my old wipper snipper motor on it next.
And some better rear wheels.



Running with the stretched tyre look















Seems to be a good spot for the kill switch.
Both times I rolled it, it switched itself off







Video coming.
I had the camera rolling the whole time.

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Old 06-24-2012, 09:57 PM
  #54
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Default RE: Alloy Monster MKIII



Video as promised.


[youtube]http://www.youtube.com/watch?v=KLEl5QEjmgs&feature=youtu.be[/youtube]




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Old 06-24-2012, 11:34 PM
  #55
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Default RE: Alloy Monster MKIII

Ok not sure what happened there.
Try again.


[youtube]http://www.youtube.com/watch?v=KLEl5QEjmgs&feature=channel&list=UL[/youtube]




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Old 06-25-2012, 01:35 AM
  #56
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Default RE: Alloy Monster MKIII

nice build,it's a nice thing to put an r/c veichle together out of a load of scrap parts and get it running as good as this,but i think that engine is very underpowered,might help to fit a higher rpm spring to give it a little help,sounds like it could overheat things the way it is now,those weedwacker engines are made to turn a shaft and not much power required to do so,a two stroke engine that is not revving at full rpm most of the time will coke up and die (carbon build up) they are made to run flat out,i recon get some more power to play with,it's a heavy looking unit.

clutch:
the clutch work you have done,ie-lightening the shoes won't make the clutch come in later it will help spool the engine up faster when it comes in,but this is also not helping your engine right now cause i think everything in the clutch area is coming too early,lightening the shoes is good as you have done to help the engine spool throught the revband faster,if you want to get the clutch coming in later to help with acceleration take some material off the shoe itself,take away some of that asbestos from the shoes or what ever it is on those,take it right down,it is long lasting material anyway also a stronger spring,then you will get rid of that bogging going on,also be carefull to machine the two shoes the same,keep the weight identical if you can cause you will break springs like no ones buisness if the shoes are differnt weights, a few mills of weight differnce is a lot at 12000rpm

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Old 06-25-2012, 02:18 AM
  #57
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Default RE: Alloy Monster MKIII

Cheers.

Yeh it still needs a tuneup and I'm thinking of putting the stock exhaust back on for the next run.
While this pipe sounds sweet I'm not convinced that it's actually improving the performance.
Plus at some point the pipe came loose, not sure when.

It is a heavy car but as it is I can't really make it any lighter.
It's 99% aluminium, so.... *




The motor probably weighs as much as the chassis and wheels.
As for stiffer springs - I've tried a 6K spring and that didn't work at all.
It only just engages and the car crawls along at walking pace

I still have a few more clutch shoes to mess around with and a few springs I haven't tried.

Thinking of putting a more recent Stihl FS45 motor on it down the track and seeing how that goes.


It still went pretty well on this run considering it was battling pretty thick and wet grass and was running on 3 tires more or less the whole time.
I could have swapped that one over but was having too much fun and it sort of stayed on there most of the time.

All in all I'm happy with the way the steering works.
Building a steering setup from scratch that works and turns a large car like this (without a diff) is not easy, but I think this one is working.
I tried to make all the components easy to replace and switch if needed and putting a different motor on shouldn't be a major hassle.

The problemsolving, building and tinkering is what I enjoy the most.
Driving and seeing that it works is satisfying but I'm happiest when the car is on the bench and I'm thinking about how to do this or where to put that.


Was hoping to go to the beach for a run on the flat packed sand at low tide but the weather was (and still is) too crappy and unpredictable.




[EDIT]
*
Actually that's not true when you take in to account the rod ends, axles and all the nuts and bolts....
But still, most of the things that can be aluminium, are.....




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Old 06-25-2012, 04:31 AM
  #58
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Default RE: Alloy Monster MKIII

in fairness you got good top end grunt there,i would be more than happy with that,maybe the clutch is fine and it's the spur/clutch gears you need to mess around with to give you more boost off the line where it looks to be lacking,well if you have no diff in this unit well then it's impressive to say the least cause no diff would explain why the engine can't lay down the power at it's best, i love the work you done on the hubbs,really nice!
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Old 06-25-2012, 01:07 PM
  #59
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Default RE: Alloy Monster MKIII

Am looking at putting this Husqvarna 40cc brushcutter motor in it.
The casing is all plastic and it's very light.

It's already set up to take an angle grinder head on the output and should fit nicely on the chassis.


I also have a diff that could be used but it would require a lot of reworking of the rear end.

Watch this space.


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Old 06-25-2012, 02:21 PM
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Default RE: Alloy Monster MKIII

Nice nice! Is that your fingerprint by the way? You are not unfamiliar with reworking things if i know you right
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Old 06-25-2012, 06:07 PM
  #61
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Default RE: Alloy Monster MKIII

Quote:
Is that your fingerprint by the way?
Haha yes Lars that would be the imprint of one of my dirty digits





Quote:
You are not unfamiliar with reworking things if i know you right
Nope not at all.
I'm looking forward to fitting this new engine.
I pulled the old one off and mocked up this one already.
Should work well.
A bit of Swedish powerrrrrr should sort it out.






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Old 06-26-2012, 02:38 PM
  #62
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Default RE: Alloy Monster MKIII

I have always wondered what your fingerprint looks like, now i know I was going to comment that swedish power in my last post but forgot it. You are going back to your roots, soon the circle is completed

I think it will work nice with a diff, the cars almost spins out on idle without one
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Old 06-26-2012, 05:30 PM
  #63
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Default RE: Alloy Monster MKIII

Quote:
I have always wondered what your fingerprint looks like, now i know
O.....K? [&:]

Anyway, moving on from that.



I'll get this motor set up first then I'll start tinkering with the diff.
Probably set up a new rear axle on the side, and attach it when it's all done.



I think I've got it worked out how to set the motor up.
Should work pretty well I think.



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Old 06-26-2012, 08:06 PM
  #64
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Default RE: Alloy Monster MKIII

All seems to fit pretty well

Gonna mount the motor on a separate aluminium plate and then bolt that plate to the chassis.
It'll make it easier to work on, and also add a bit of strength where I'd cut the chassis plate out for the other motor.









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Old 06-27-2012, 02:03 AM
  #65
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Default RE: Alloy Monster MKIII

any intrest in making your own shocks with that lathe?
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Old 06-27-2012, 03:41 AM
  #66
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Default RE: Alloy Monster MKIII


Quote:
ORIGINAL: Dirty_Vinylpusher

Quote:
I have always wondered what your fingerprint looks like, now i know
O.....K? [&:]
Just kidding

Looks like a neat and nice setup you got there! As you might remember i made an angle grinder-setup similar to yours about three years ago, i think i will rework it a bit when seeing this compact lump of yours
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Old 06-27-2012, 01:00 PM
  #67
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Default RE: Alloy Monster MKIII


Quote:
any intrest in making your own shocks with that lathe?
I've tinkered a bit with it in the past but haven't completed anything as yet.
All in good time though.





Quote:
As you might remember i made an angle grinder-setup similar to yours about three years ago, i think i will rework it a bit when seeing this compact lump of yours
Ah yes you did, I remember now.
My setups are getting more and more refined and "tight".

I like using grinders, as you well know, as they're a good means of gear reduction.
Most of the ones I've pulled apart are around the 3.8:1 reduction and it's a lot easier to set up than making your own gearbox or having 2 sets of sprockets.
The only downside is that they are a bit heavy, but they'll never break.







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Old 06-27-2012, 01:57 PM
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Default RE: Alloy Monster MKIII

Exactly my thoughts about them too. And the angle drive also comes very useful! The only thing to care about is the final drive from sprocket to sprocket, where you easily can change the gearing as you wish.
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Old 06-27-2012, 02:04 PM
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Old 06-27-2012, 08:45 PM
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Default RE: Alloy Monster MKIII


Started looking at how to mount the motor.
Will put it on a separate plate and then bolt that to the chassis.


Something like this.










Will use the guard clamp as a brace as per usual.









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Old 06-28-2012, 09:42 AM
  #71
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Default RE: Alloy Monster MKIII

dangerous sharp edges...
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Old 06-28-2012, 12:51 PM
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Default RE: Alloy Monster MKIII

They will be filed down once everything is in place.






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Old 06-28-2012, 06:43 PM
  #73
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Default RE: Alloy Monster MKIII

As seen in the video I was having a bit of trouble with the wheels.






I figured I needed to make beadlocks somehow and I reckon these old trolley wheels should do the trick.




As they're a split rim, I put one half on either side, pinching the rubber against the plastic rim

















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Old 06-29-2012, 01:57 PM
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Default RE: Alloy Monster MKIII

Now that is smart! And you even get a steel look-rim for free
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Old 06-29-2012, 11:45 PM
  #75
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Default RE: Alloy Monster MKIII

Yeah it seems like it should work.
But we'll see.


Motor is mounted and I'm just fiddling around with the throttle cable and killswitch at the moment.
Might be ready for a quick test run tomorrow.










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