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Oldschool Scaley Brabham Bt49


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#1 Wobble

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Posted 25 August 2016 - 04:34 PM

A mystery parcel arrived from the UK yesterday with a variety of bodies, chassis, motors, wheels and axle sets etc.
This was amongst them and the 1st thing I noticed was the tubed front axle but the rear axle wasn't in the car. In a bag of goodies I found the axle, and thought this car needs a bit of work 'cos we've got F1 on the agenda for tonight.

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When I took the screws out I was a bit surprised to find someone had shoe-horned a FF motor in there and glued aluminium ribs in as well. F1 Ultragrips were the 1st thing and when the rear axle was glued in, one front wheel was riding high so I retrued the fronts and reglued the axle tube. It also has a bigger guide unsure of what make.

I'm hoping this might be a flyer.

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Edited by Wobble, 12 July 2017 - 09:12 AM.

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#2 aquakiwi

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Posted 25 August 2016 - 05:33 PM

I like those old F1s, timely article as I have one due any day now.

#3 munter

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Posted 25 August 2016 - 06:04 PM

are you sure you havent raided Slotmadmacs shed?
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#4 slotmadmac

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Posted 25 August 2016 - 07:15 PM

Those Parmalat Brabhams are a great platform. Get that thing tidy and on the track!
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#5 Wobble

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Posted 25 August 2016 - 08:42 PM

Go? man it goes, 7.7 fastest lap,1st time under 8secs for me on Wazzas track. 1st race 1st win.

One of these (complete except for rear tyres) was in the parcel as well so a bit more work to do.
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#6 slotmadmac

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Posted 26 August 2016 - 05:30 AM

They are another winner. Their only issue is you need to grind out the underside of the front wing to get the guide wire to turn freely once you remove the surplus guide holder from the chassis. This makes the wing a bit fragile. I would also brace the motor to the rear bushes. I'd do the same for the Brabham.
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#7 Wobble

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Posted 26 August 2016 - 07:23 AM

View Postslotmadmac, on 26 August 2016 - 05:30 AM, said:

They are another winner. Their only issue is you need to grind out the underside of the front wing to get the guide wire to turn freely once you remove the surplus guide holder from the chassis. This makes the wing a bit fragile. I would also brace the motor to the rear bushes. I'd do the same for the Brabham.

Thanks for the tips Mac. I also used this in one race last night and halfway through the race the hot glue gave out on one side of the motor. I managed to finish the race but under hard acceleraration out of the corners it bunny hopped so bad it had almost an inch of clearance under the back wheels. It was so bad it spat the wing out. I'm gonna sand the sides of the chassis each side of the motor so the hot glue has something to key into. Also, on Wazzas track with the long straights it runs out of steam so going to try an SRP 20k motor for a bit more torque. I think a Piranha might give it an unfair advantage
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#8 aquakiwi

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Posted 26 August 2016 - 07:29 PM

Bram, what tyres do you use on the rear?

#9 GAS41T

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Posted 26 August 2016 - 07:54 PM

Well done wobble great find
And congrats on the time & win

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#10 Wobble

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Posted 26 August 2016 - 08:36 PM

View Postaquakiwi, on 26 August 2016 - 07:29 PM, said:

Bram, what tyres do you use on the rear?


NSR 5221 Ultragrips for F1.

While I was prepping the Renault chassis for regluing the motor I decided to add a bit of bracing. 2mm carbon fibre rod has made an immense difference to stiffness and a 20k SRP should add a bit more sting.

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Edited by Wobble, 12 July 2017 - 09:13 AM.

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#11 Wobble

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Posted 28 August 2016 - 10:06 AM

It was cold wet day here yesterday so I spent a bit of time on the 312T3.
I decided on an FF motor for this to try and match it to the Brabham and added carbon fiber ribs even though the chassis is a whole lot stiffer than the Renault.

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and my line up - Brabham 66gm, Ferrari 67gm, Lotus 68gm, and the heavyweight of the bunch, Renault 72gm
My favourite is the Brabham, I like its looks, so I might need to try and make a new wing for it.

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Edited by Wobble, 12 July 2017 - 09:14 AM.

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#12 munter

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Posted 28 August 2016 - 03:15 PM

I have the Renault, they handle well but my previous car was the JPS Lotus which was not that great, before that was a Tyrrell.

I think the bearing holders are a vulnerable part of the design.
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#13 slotmadmac

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Posted 28 August 2016 - 03:45 PM

Looking good. Fixing the longitudinal flex is smart but if you also brace the motor to the rear bushes I guarantee you a smoother faster drive - especially under braking.

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i reckon there are few inline / no pod situations where a bit of wire and some JB Weld won't improve your handling.

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#14 David Carter

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Posted 28 August 2016 - 07:11 PM

one of my favorite cars to race
they go likes the clappers around corners
Holdens rule the rest just drool
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#15 munter

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Posted 28 August 2016 - 07:12 PM

I havent seen a plastic chassis that didnt flex in that vital transmission area....some more than others.
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#16 aquakiwi

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Posted 28 August 2016 - 08:42 PM

Good tips guys, I shall use them on mine, just waiting for tyres, and a anther car that I'd forgotten I'd bid on.......and won.

#17 slotmadmac

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Posted 29 August 2016 - 07:24 AM

Getting the front axle spinning really freely with all the friction in the tube is obviously another key. I ream out the 3/32 brass tube with a power drill first and have recently been using 3mm spacers between the wheel and tube with good effect. For some reason gluing the spacer to the wheel hub seems to make the axle spin more freely - perhaps because there is only one friction point on the spacer instead of two.
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#18 shadow_rusty

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Posted 29 August 2016 - 12:32 PM

For the bracing, I've seen quite a large difference between hotgluing it in, and epoxying it in too...
Just some food for thought.
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#19 branco

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Posted 29 August 2016 - 01:26 PM

Nice cars there Wobble
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#20 munter

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Posted 29 August 2016 - 01:49 PM

I never use hot glue on my slotcars...i) it looks shite. ii) it seems to break loose too easily.

CA for me mostly.

Edited by munter, 29 August 2016 - 01:51 PM.

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