Peter Wallers Fleas

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Rapidrory
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Re: Peter Wallers Fleas

Post by Rapidrory »

Is the right angle gear necessary? I'd have thought it'd be easier to just shift the motor back a little and use either a belt or a straight gear drive...
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peterwaller
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Re: Peter Wallers Fleas

Post by peterwaller »

A right angle is not essential but it is not much more difficult than straight gears and I am not a fan of belts at this sort of scale they tend to stretch.
This is the sort of thing I am looking at.
Image
I know it is more normal to have the gears round the other way but the crown wheel had a 3mm inteference fit hole so was ideal for the motor shaft and the other gear had a 2mm hole which I tapped out to M2.5 to fit the threaded shaft.
It also means the drive is 1.5 times faster instead of 1.5 time slower.
Last edited by peterwaller on Fri Jul 21, 2017 7:42 pm, edited 1 time in total.
Rapidrory
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Re: Peter Wallers Fleas

Post by Rapidrory »

Ah ok, I thought you were moving the spinner motor instead of the drive motors. That looks very nice :)
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peterwaller
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Re: Peter Wallers Fleas

Post by peterwaller »

It is starting to take shape but is looking a bit heavy at 52 gms without spinner, batteries or electronics.
Image
Image
Last edited by peterwaller on Fri Jul 21, 2017 7:43 pm, edited 1 time in total.
Rapidrory
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Re: Peter Wallers Fleas

Post by Rapidrory »

Looking good so far. I've never yet been drawn against fleabite.. neither of my fleas are particularly spinner proof, so I'm now looking forward to the inevitable even less :P

The motors are usually the bulk of the weight so 23g isn't too bad I'd say; though it may have to be a pretty small battery or a light blade.. that said; HSOD's blade is only 6g and that seemed to work pretty well :L
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Shakey
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Re: Peter Wallers Fleas

Post by Shakey »

HSOD's is 10g. :)

Still looking nice and scary!
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peterwaller
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Re: Peter Wallers Fleas

Post by peterwaller »

As I thought transfering the electronics across brought it up to 72 gms without a blade so I need to do some weight saving.
Each wheel, tyre, axel, gear and 3 M2.5 nuts used at present come out at 6 gms so I can save some there.
I found if you take an M2 nut and drill it out to 2mm and tap it to M2.5 they are about half the weight of an M2.5 nut so that could save the best part of a gram. A smaller gear also thinned down will also help plus designing a lighter wheel tyre combination so I might just about make it.
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peterwaller
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Re: Peter Wallers Fleas

Post by peterwaller »

The weight problem wasn't quite as bad as I thought as I had a spinner hub on the motor weighing 4 gms that I hadn't realised was there.
Any way I saved 3 gms on the wheel and tyre redesign plus about 1.5 gms on the shaft gear and nut mods.
The new hub is fibreglass with a 1mm thick titanium blade and with new batteries which were about 0.5 gm heavier it has all come out at 75.3 gms.
I have been unable to include a lid but have managed some 0.75 mm polycarb armour around the front, wheels and sides.
Image
Image
The reach of the blade isn't as good as I was hoping for so will have to wait and see if it is any good in combat.
It doesn't need to be that great to improve on the old version.
Last edited by peterwaller on Fri Jul 21, 2017 7:35 pm, edited 1 time in total.
Rapidrory
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Re: Peter Wallers Fleas

Post by Rapidrory »

*cries*
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Re: Peter Wallers Fleas

Post by Remote-Controlled Dave »

That's a great looking thing.
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