Look what I did today :D
 

I got bored today, so I thought I'd jump on the bandwagon and find a use for my old IRS TC3 chassis...

http://img246.imageshack.us/img246/6...overallvh0.jpg

http://img81.imageshack.us/img81/174/b4cmtoplz2.jpg

Sorry for the appalling camera phone pictures.


Not bad for an afternoon with the dremel :)
Now it's only a proof of concept so there are, 'issues'. I fully expect it will snap in half if I land it too hard as I've had to take so much off the chassis at the back, those kind of issues :D

I've tried to keep all the heavy stuff as close togeather as possible and the weight distribution front to back is almost exactly the same as a standard car. If anything it's a bit heavier at the back than normal.
The gearbox and rear suspention are all un-altered, and a standard gear cover + bodyshell fit too. The wishbones are mounted to a carbon fibre T-plate with modified BJ4 suspention mounts, and by making the rear shock tower in two parts I can use a standard BJ4 rear shock tower too.

Just need a meeting to run it at now :rolleyes:

awesome start there rich! I guess the losi is an easier car to start somethign like this since you have the hinge blocks that can mount onto a flat plate carbon chassis if you go that way. more more:D

This is just a cheap way of testing the layout before I get a carbon chassis made up, and I'm fed up of waiting to get hold of a GT2 front end :rolleyes:

I origonally got the Losi with the intention of turning the gearbox round as the B4 looked too hard to do. Now I've got a CR I ended up doing a B4 instead :p

Right, thats it, I am going to do mine mock-up this week.... turn this totaly on its head I think.

Any better pics Rich? Where and when are you going to run it?

G

I'll fire up the D70 tomorrow G, what do you want to see?

I'm going to run it whenever I can throughout the winter.

pics of how and where the rear end is mounted would be nice.. and the shock tower peices. :)

I like!

dude, how did you reverse the gear box? Got any pics of how you did it?:confused:

It ain't reversed

For the moment I just turned the gearbox 180 degrees, if the layout works well I'll look into flipping the layshaft over and having the motor spin the normal way.

good skills Richard!

looks a bit long though?

hmmm, I think I am gonna try this with my B4 soon. I am also gonna mod the chassis, and a new bodyshell and wing made;)

It's deceptive, the rear wishbones are now swept forward and the shocks/tower are on the other side, so there's a big gap where all that lot would be. I don't have another built up B4 to compare it with but it's more or less the same wheelbase as a CR.

got any more pics matey? This looks very swish, not a bad afternoon's work LOL

Here's some better pictures, be gentle :p

http://img505.imageshack.us/img505/9063/overallsq0.jpg

http://img187.imageshack.us/img187/6408/chassismo0.jpg
I went a bit mad with the side of the chassis here, I could have left more on the vertical part of the tub and still had clearance for the motor.

http://img73.imageshack.us/img73/3117/spurmz1.jpg
A bit more chassis left here.

http://img73.imageshack.us/img73/866/tplateoa6.jpg
T-plate, the wishbones are as low as possible, level with the bottom of the chassis at the back.

http://img170.imageshack.us/img170/3...eelbasedl7.jpg
Lined up against a standard B4 (bottom), both chassis are level with each other. The mid car (top) is actually slightly shorter.


There's a lot of tidying up to do, especially stuff like how the gearbox ties into the top deck and the rear shock tower mount. The cut down u-brace for the rear toplinks will be carbon fibre eventually, and I'd like to mount the gearbox lower into the t-plate too.

If it works well I'm going to make a full double deck chassis using the GT2 truck front end, there will also be enough room for the radio gear on the chassis. As it is currently with the bracing ribs of the chassis I think I'm going to have to dump either the speedo or reciever on the top deck.

dued that is way cool. I am thinking about modding my B$. I have decided to mould an insert for where the layshaft normally goes out of the tranny box, and cut a hole in the other side, switching the slipper round, so it will work as norm.

May I ask, where did you get all those blue poles? and carbon fibre?

Thanks

BEn

The T-plate, lower rear shock tower and small piece that links the gearbox to the topdeck were an IRS TC3 chassis, the top deck was a B4 FT battery strap.
The blue spacers are from the IRS chassis (the thick ones) and an old BJ4 http://img156.imageshack.us/img156/4407/smashud5.gif

that looks bloody great u recon u could be faster with it ?, because at the castle howard earlier this year u were flying with ur ft b4 in the final and won even though u had a 2 minuite time handy cap right?

cheers garry;)

You don't need to mod the tranny to make the motor spin the normal way. the lads who tested this, and claim that running the motor in reverse is 'not quite the same' were using V2 motors. V2 endbells are not symmetrical..... if you flip the endbell 180°, the timing is off by a couple of degrees. Hence the difference.

You don't need a GT2 front end either. The 2WD durango has a bent piece of metal (25°). Like the B3, in fact. Works fine.

Good thinkin' to use the BJ4 toe in blocks. Let us know how it handles! Can't be bad, really. the weight is right where it should be, and a little more aft than on the X-6.

Moulded carbon tub with the kick-up included in it would be dialled!

you sure about turning the timing 180 degrees? If so, that would make my mod a heck of a lot easier, as I was planning on slightly modding the gear box. I think to do the mod properly I may still mod the tranny anyway, as it will make installing motors easier in the long run. I am thinking about making a skinny chassis, can I use my B4 chassis? And just cut off sides, and re-enforce it?

Thanks

Ben

yeah but why would you do that? it's the ideal place to mount electronics low and it would give the car alot more flex around the axis in the lenght (let's call it X-axis) In the attachment you can see how Elvo and me reinforced our Saddle pack B4 prototype.

right, that looks good. I may do something like that, or consider taping them in;)

You'd be relying on the bracing that normally goes either side of the cells for strength, but it wouldn't be there :p

I don't see any advantage to having a super skinny chassis like the Durango, we don't have issues with the sides grounding anyway on the B4 as the chassis curves up at the sides :confused:

Cooper, I bet that still twists though, as the two carbon braces aren't tied to each other, though about doing a one peice topdeck??

TYRC, ther is no advantage, like Richard said, in chopping off the sides, the only way to go with that idea, to a narrow double deck carbon chassis....

DCM: yeah but we don't want to waste expensive carbon for that :D

first test is to see if the concept works and can always be refined later, the braces used here are chopped carbon Losi baterry braces (recycling saves the planet!)

99% sure, yes. The brushes are not 90° to the screws.

A narrow chassis looks cool, but that's about it. If the sides are raised like on the B4, and you put the heavy stuff in the middle, that'll be fine.

well, I think I may have to go down the skinny carbon fibre chassis:D

is it possible to cut carbon fibre with a jig saw?

It's possible but you'll need a reasonably fine blade, one designed for aluminium would probably work. Be careful :o

yeah with all the dust and shards LOL. I think a C.F. chassis will be a future devlopment.

A fret saw and a vacumn cleaner would be the easiest and cleanest way, just wear latex gloves, long sleeve top and a dust mask.

Yes. Expect to change the blade every 10mm you cut.

fybre-lite would be the sensible option.....

whats a fret saw Steve?

dremel ?

googles great.... http://www.tooled-up.com/Product.asp...ite&PID=138450

A jigsaw is a bit like taking tyles off a wall with a jackhammer, not exactly accurate and overkill. The fretsaw is far more accurate, and depending on the blade, can go around tight curves to. An essential item if you do lots of work.

I like to go around tight curves.... :D

me too, but the only chance I got at the moment, is doing bodyshells, lol

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