New S.O.S Micro racer prototypes parts

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Well after the first test at the weekend i thought it about time we put up a thread about some new parts we've been working on for the current micro racers (Carisma GTB, losi mini 8 and hopefully soon to be LC racing). Please excuse the phone photo quality!!

I should note here that we could produce these for other makes of cars in batches if they were wanted We would just need a fesh new part to make the drawings from sent to us.

First up is our Super heavey duty grade 7075 T6 Aluminium alloy or Ti6al4v Titanium Alloy re-enforced carbon fibre shock towers.



First up for the Carisma GTB



Next up for the Mini 8



These one's shown on our cars are made from 1.2mm Titanium () rebated and resin fixed into 3mm pure carbon fibre. Matt/Scattyv (who to be fair has put the majority of the work into these new products) had the orginal mk1 prototype of these on his car for over 9months and many hundreds of hours of racing/crashing. To the point that the carbon fibre had broken in many places yet the tower held together and stayed strait. In the same period of time Brimmers (the 3rd part of S.O.S) went through a fair no. (4-6) of carbon towers in the same time from no worse crashes than Matt.

We have altered the profiles of both towers.
In the case of the GTB the changes are for aero rounding the top profile to smooth airflow and also as the alloy/carbon composites are stronger we feel it safe to increase the central hole to aid airflow onto the cab increasing front down force. These also have the extra shock and caber link positions as our standard carbon towers.

In the case of the Mini 8 towers the alterations were pretty much the oposite. increasing the top radius and side profiles of the towers so as to make them stronger and more resiliant in this area that takes all the load the hole for airflow is already quite large so was no need to change.

Realistically we will be looking to do small production runs with 1.6mm 7075 T6 Alloy inserts as this will allow us to keep a "relatively" low sale price of £15-20, TBC once we have the production costing sorted.
I think we would probably only offer the titanium versions if a batch was ordered as the cutting time for the Titanium is many times that of the 7075 t6 and as such they would be more expensive.

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Full details tomorrow/later
We've also cut a first prototype set of 6082 T6 aluminium alloy hinge pin hangers for the Carisma GTB. These utilise the Losi mini 8 inserts to allow both tow in and anti squat adjustment. Also as they do not need to be so large/cumbersome they can offer an interesting tuning aid of +-1.6mm wheel base adjusment from stock as is (but may be able to up this to+-2 with more development

Night

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So Aluminum hinge pin holders for the GTB.

These are the Mk 1 prototypes so have just had a quick De-bur and sanded back rather than a full surface finish (polish or anodising not sure which yet). Also the holes for removing the inserts were hand drilled as an after thought. On the final product they would be cnc machined and nice and central.

Rear pair first - These provide rear toe adjustment from -1.5 degrees to -3.5 degrees and anti squat adjustment +-1 degree from stock antisquat (As per mini 8 settings sheet). Also due to not needing to be so deep we are able to provide wheel base adjustment by +-1.6mm from stock (but hopefully with some design adjustments we can get this to +-2mm from stock). Which out of interest is still BRCA legal.






Next the front hanger - this is only for the front and doesn't contain inserts. This is more for strength really (I've bent the standard in a crash) but we could have separate options available with different kick up/caster angles. We don't expect to do the rear hanger for the front at the moment but this may change

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Next prototype off the cnc this afternoon are 7075 T6 alloy chassis for the GTB . This again is just a basic rough prototype with minimal finishing (a light sanding with 1500 & 3000grit). I will be fitting it on my car and testing it at the weekend.



I'm unsure what the flex level will be, but if I find I need more flex we are prepared to start milling pockets out of the top side . This could also have add benefits of allowing me to lower the full electrics install in places reducing cog. We are looking at the process of hard anodizing them in house as well but we will see about this.

I have not had a chance to accurately weigh all the new parts but safe to say the alloy components could add a bit of much needed weight low down.

If there was interest in these we would be looking to sell them at a very reasonable price somewhere around £25.

And before I forget if thermal past is used between the motor and alloy motor mount and alloy motor mount and chassis I think it should aid with thermal management somewhat increasing the heat sink area quite drastically. I will check this at the weekend also.

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Ooh I did forget that it has 2 extra servo mounting holes pre drilled suitable for the slightly larger servos such as the very popular Savox SH1257MG.

[silone74]

Did the chassis get tested or is it still awaiting test



Cheers Si