26th-Apr-22, 11:03 AM
Kevan,
The chassis is something been working on over the break taking the SW chassis I did for the A112 and removing the torsion arms where I wanted a chassis that could meet the no suspension rule for club racing, yet have springs added if so required. The other advantage is that the same chassis will take a range of IL pods for different motors so quicker to come up with motor permutations. The chassis is a fork design with the pod tucked in secured on 3 points, front and sides and have used a ‘bridge’ to stiffen the whole assembly secured with 6 screws.
Ran the ‘production’ F3 around the GT Raceways Battlesbridge Ninco track last night and pleased with the performance using the 10:36 ratio and the NSR 25K evo. The draft version running 9:28 was hopeless on brakes, changing to 8:30 was too slow so redesigned the chassis to take the larger BRM IL cogs (34 & 36T). Need to spend time tweaking the set up (front axle ride height, & pod screws) but the design is working well, so will leave as is for the time being.
The front tyres work well as the TPU is naturally ‘greasy’ so zero grip. Using my own wheels (based on BRM dimensions) with a single lip gets round the issues of getting the tyres on/off and the tyres were designed to have zero clearance to the hub and hence are a tight slide fit.
Cheers
JMay.
The chassis is something been working on over the break taking the SW chassis I did for the A112 and removing the torsion arms where I wanted a chassis that could meet the no suspension rule for club racing, yet have springs added if so required. The other advantage is that the same chassis will take a range of IL pods for different motors so quicker to come up with motor permutations. The chassis is a fork design with the pod tucked in secured on 3 points, front and sides and have used a ‘bridge’ to stiffen the whole assembly secured with 6 screws.
Ran the ‘production’ F3 around the GT Raceways Battlesbridge Ninco track last night and pleased with the performance using the 10:36 ratio and the NSR 25K evo. The draft version running 9:28 was hopeless on brakes, changing to 8:30 was too slow so redesigned the chassis to take the larger BRM IL cogs (34 & 36T). Need to spend time tweaking the set up (front axle ride height, & pod screws) but the design is working well, so will leave as is for the time being.
The front tyres work well as the TPU is naturally ‘greasy’ so zero grip. Using my own wheels (based on BRM dimensions) with a single lip gets round the issues of getting the tyres on/off and the tyres were designed to have zero clearance to the hub and hence are a tight slide fit.
Cheers
JMay.
Mr Fit for Function.

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