"Never Give Up!" - Page 2

Dandare · #21 09-03-2016

Thanks for the advice re. the diff.

Few bits done tonight.

I decided to buy the alloy Astute gearbox mounting posts as I keep reading the plastic ones snap all too easily,

I made a carbon support brace for the rear tower too,

Then.... DISASTER !!

I'm baffled, I've been very careful in handling the chassis, no screws over-tightened, no force put on it. I was literally in the process of mounting the rear tower when I noticed the gearbox was loose & found the chassis cracked. Whilst removing the gearbox & hingepin screws bits of plastic were just falling off, like it just decided to disintegrate

I'm a bit gutted as I'd also ground off the cracked front bulkhead posts & replaced them with steel threaded posts.

I have one spare chassis (apart from the vgc one on the complete car I bought, which I don't particularly want to use) but this has seen a good amount of action.

I'd like to source another good chassis (if anyone has one let me know...)

I'll re-build it again with my only spare chassis whilst being SUPER careful, I'll also take the motor off until I've fully secured the gearbox to the chassis with the shock tower in place to prevent excess weight breaking the chassis. I will then move on to the front end, I guess it's all part of vintage tinkering

Peakey · #22 09-03-2016

I think you need to talk to Jerry (jerzi) on here about him making you a carbon tub for that ��

http://www.oople.com/forums/member.php?u=9484

Ben The Bike · #23 09-03-2016

Quote:

Originally Posted by Dandare

Thanks for the advice re. the diff.

Few bits done tonight.

I decided to buy the alloy Astute gearbox mounting posts as I keep reading the plastic ones snap all too easily,

I made a carbon support brace for the rear tower too,

Then.... DISASTER !!

I'm baffled, I've been very careful in handling the chassis, no screws over-tightened, no force put on it. I was literally in the process of mounting the rear tower when I noticed the gearbox was loose & found the chassis cracked. Whilst removing the gearbox & hingepin screws bits of plastic were just falling off, like it just decided to disintegrate

I'm a bit gutted as I'd also ground off the cracked front bulkhead posts & replaced them with steel threaded posts.

I have one spare chassis (apart from the vgc one on the complete car I bought, which I don't particularly want to use) but this has seen a good amount of action.

I'd like to source another good chassis (if anyone has one let me know...)

I'll re-build it again with my only spare chassis whilst being SUPER careful, I'll also take the motor off until I've fully secured the gearbox to the chassis with the shock tower in place to prevent excess weight breaking the chassis. I will then move on to the front end, I guess it's all part of vintage tinkering

OUCH!

is it worth making a plate to shore that up with instead of using a new chassis, like I did for the front of my Xfactory car? I have a n old modelsport brushed speedo you can libererate from me next club meet if needed. Can't wait to see it going

Dandare · #24 10-03-2016

Cheers Ben, but I'll go with 17.5 brushless for now as I also have a few brushless esc's spare. The car won't be getting lots of use so I'm hoping the tranny will cope

Got a bit more done today.

I've shimmed the hinge pins to reduce some of the 80's slack ! Can't say I like the way the wishbones twist when the suspension is compressed but I guess that's old Tamiya's for you

Schumacher turnbuckles fit nicely & nothing fouls throughout suspension travel. I've lost confidence with the rear of the chassis as the other one disintegrated.

I've managed to track down a brand new 'old' chassis from a model shop in.... Athens ! Yes, you read it right ! I might fit it to the other Madcap which is hardly used & use the removed chassis as a spare. I do wonder if it's possible/viable to almost make up an aluminium 'backbone' to run underneath the length of the chassis as I can see this one breaking too...

Anyway, tomorrow's job to assemble the diff using the Hop Up kit...

cjm_2008 · #25 13-03-2016

That's it, you've inspired me to get my super astute going

The rear of the madcap chassis near the 'diff hatch' was always a weak spot. The front kick up plate (where the wishbones attach) is worth keeping an eye on too.

Dandare · #26 16-03-2016

Well, no pics but a brief update...

Things not going well with my little project. The second chassis has started to crack just like the first, not as bad but close. Also, the hinge pin blocks are cracking.

I carefully made up a 1.5mm alloy rear plate to secure to the underside of the chassis in an attempt to save it, it fits well but I've also noticed a section beneath the shock tower mount has also cracked !

I feel like giving up at this point, it's getting expensive & I've little to show for it except a pile of parts, some of no use or cracked. I'm still awaiting the arrival of my brand new (old stock) chassis, but I haven't decided whether i dare use it for this car or to bin the project entirely.

I suppose I'll have a look at things again soon with a different frame of mind, but not tonight...

Ben The Bike · #27 16-03-2016

Quote:

Originally Posted by Dandare

Well, no pics but a brief update...

Things not going well with my little project. The second chassis has started to crack just like the first, not as bad but close. Also, the hinge pin blocks are cracking.

I carefully made up a 1.5mm alloy rear plate to secure to the underside of the chassis in an attempt to save it, it fits well but I've also noticed a section beneath the shock tower mount has also cracked !

I feel like giving up at this point, it's getting expensive & I've little to show for it except a pile of parts, some of no use or cracked. I'm still awaiting the arrival of my brand new (old stock) chassis, but I haven't decided whether i dare use it for this car or to bin the project entirely.

I suppose I'll have a look at things again soon with a different frame of mind, but not tonight...

NEVER GIVE UP DAN

I'm sure you could get an aluminium chassis made if you look around a bit, is the plastic cracking on bits from just one car or are they all brittle? I heard somewhere that you can soften some plastics by boiling them, but can't remember which plastics they were.

DanB4 · #28 17-03-2016

I have a Madcap that my kids thrash around the beach with a 21 turn brushed motor in - even then I can hear the gearbox hurting so unsure how the torque of a brushless will end

I also have a parts car you can have mate, unsure how good it is but drop me an email and I'll send you pics.

Dan

Dandare · #29 18-03-2016

Well I haven't really done anything since but here's the plate I made up, ignore the screws as it isn't quite finished & I've run out of countersink m3 screws. You'll noticed I haven't cut a hole for the access plate, i'm not sure whether to maintain max rigidity & accept the hassle in removing the gearbox if I need to adjust the diff or cut the hole & risk making the plate weak...

One of the two remaining good hinge pin blocks is cracked too

I wonder if these could be 3D printed... Otherwise, not too bad. I'll build the diff, finish off the rear end & make a start on the front.

xfactor · #30 26-03-2016

Dan,

I think there is a Mad Cap on ebay with a carbon chassis. May help you out.

Dandare · #31 26-03-2016

Well I've been I bit busy during the week to achieve much except for building the diff,

Anyway, today I've pushed on. Rear is almost done, I need to order a few things including a pinion. The front end now has the carbon shock tower brace fitted,

This assembly then bolted to the chassis with the adjustable camber & steering links fitted. I've also replaced the awful 'coat hanger' steering linkage. There is still some slop but given it's design now it's acceptable,

And with the upper bulkhead fitted, I had to raise this 2mm to clear the revised steering linkages,

So this is it for now with the servo fitted, rolling chassis almost finished,

Next is the ESC & receiver, wheels & tyres.
I haven't decided whether to use one of the 2 original shells for it or to buy a new shell & do my own colours...

Does anyone know what other 2.2 wheels will fit the front of a Madcap ? I have the 5 spoke Ballistic 'vintage' rims along with being able to use my normal Team C/Kyosho rears but i'd prefer to have matching front solid white front rims.

Dandare · #32 26-03-2016

Quote:

Originally Posted by xfactor

Dan,

I think there is a Mad Cap on ebay with a carbon chassis. May help you out.

I've seen this, it's in my watch list

thanks fella.

xfactor · #33 26-03-2016

!! Go Dan Go !!

Dandare · #34 27-03-2016

I'm going I'm going

I've ordered a brand new shell/wing too so I'll do it my normal 'race' theme

xfactor · #35 27-03-2016

Thats the way Dan.........

Dandare · #36 28-03-2016

So tonight I've completed the electrics so we're nearly done. I cant do much else until I order a pinion(s), front tyres, battery & wait for the new shell to arrive.

A few pics:

cjm_2008 · #37 28-03-2016

That's mintier than a minty thing

Dandare · #38 05-04-2016

Thought I'd do a little update. Tyres arrived as has my shiny new shell & wing

Thing's to do list:

Prep & spray new shell.
The front wheels are slightly narrower where the bearings seat so need to add a small spacer to the axle before mounting wheels otherwise the nut does up before the wheel is tight.
Fit pinion & check diff.
Replace oil in the shocks, rears need a heavier spring.
Still not happy with flex front to rear so will look into manufacturing an alloy top plate.
Set toe & camber all round.

Here are some pics with an existing used shell:

Getting there, should be ready for the end of July

OptimaFan · #39 07-04-2016

That's a used shell? Already looks "killer" this way!

cjm_2008 · #40 07-04-2016

Quote:

Originally Posted by Dandare

Thought I'd do a little update. Tyres arrived as has my shiny new shell & wing

Thing's to do list:

Prep & spray new shell.
The front wheels are slightly narrower where the bearings seat so need to add a small spacer to the axle before mounting wheels otherwise the nut does up before the wheel is tight.
Fit pinion & check diff.
Replace oil in the shocks, rears need a heavier spring.
Still not happy with flex front to rear so will look into manufacturing an alloy top plate.
Set toe & camber all round.

Here are some pics with an existing used shell:

Getting there, should be ready for the end of July

OH YES!

Love the HPI five spoke 2.2 fronts

What shocks are those? Schumacher KF?