Bodge Charger 2: Difference between revisions

Revision as of 22:55, 2 September 2024

Bodge Charger 2
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Built By	Vince Williams
Theme	ACDC
First Race	Scrumpy Cup 2019
Current Status	Active
Motor	2kw Brushless BOMA, AliExpress
ESC	1500W 48v ebike Generic controller, AliExpress
Battery	48V 12S LiPo (2x 6S)
Transmission
Contact	@Bodgecharger
View all Racer Profiles

Background

ACDC is my second generation Hacky Racer build. I built this racer in 2020 based on all the lessons I'd learned from racing my original racer (Bodge Charger), i.e it was too tall, too narrow and too unstable. So ACDC is built to have as low a C of G as possible with a wider track than Bodge Charger giving superior handling in corners, this means I don't need to slow down so much in the corners. The chassis is 1500mm long (max allowed at the time of construction) and the width is determined by the widest I could possibly make it and still be able to roll it down the pathway at the side of my house.

This photo is of ACDC running at Fully Charged at Farnborough in 2022 where it did really well in all the races.

Construction

Motor

Controller

Batteries

Drivetrain

Awards

Not Raced yet, just testing!

BOM

Bodge Charger 2 BOM	BOM	Notes
Chassis frame	£20.00	Bed frame
Donor Vehicle	£22.50	eBay, original Bodge Charger
Tyres	£-	included with Donor Vehicle
Wheels	£-	included with Donor Vehicle
Seat	£-	included with Donor Vehicle
Bodywork	£25.00	Googly Eyes, plastic pipe, carboard, stickers.
Brakes	£-	MTB Hydraulic brakes
Steering Rack	£23.78	Ali Express Rack and Pinion
Steering Wheel	£-	included with Donor Vehicle
Steering Wheel Shaft	£-	included with Donor Vehicle
Front Suspension	£13.00	2 Shocks from Mobility Scooter
Rear suspension	£13.00	2 Shocks from Mobility Scooter
Motor	£106.78	2x 48v 2kw Brushless motors
Motor Controller	£31.80	2x 1500w Brushless motor controller
Axle	£16.24	20mm hollow shaft
Axle bearings	£24.44	Pillow bearings
Collars	£5.30	Adapters for Sprockets
Nut & bolts	£20.00	Various
Switches	£10.77	2x power switches, reverse switch
Battery	£-	E-Golf Battery Pack
Sprockets	£21.98	2x 74 tooth sprockets
Chain	£-	included with sprockets
Electronic components	£15.24	ESP32, ADC1115, ADXL345, Connectors etc
Throttle pedal	£16.78	2x throttle pedals
XT90 connectors	£5.00	XT90 connectors
MT60 connectors	£3.00	MT60 connectors
Wiring	£20.00	Various
Brake Return spring	£-	Classic car throttle return spring
Isolator switch	£-	XT90 link
Total	£414.61

Limitations

The driver (that's me) weighs too much!

Resources

Twitter Account Charger @BodgeCharger

For the latest news, posts and discussions about everything Hacky Racers, head over to the Facebook group.

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 ==Construction==
-The chassis frame comes from a mobility scooter. The original front axle is kept, but the original back axle is binned and replaced with a new home made assembly consisting of two 20mm hollow axles mounted Left and Right side on 4 pillow bearings.  Each axle has a 74 tooth drive cog and a mountain bike brake disk. I kept the original steering assembly but connected a steering shaft with a UJ from a Renault Scenic to it. Originally I bolted all the bits together to the chassis, but after the first weekend's racing when all the bolts came loose I soon learned how to MIG weld!
-I bought a set of used Go-Kart wheels, hubs and a set of wet track tyres.  I fitted the rear wheels/tyres as close to the body as I could to keep the racer width sensible, then I elongated the front wheel axle so the wheel to wheel width of the front axle matched that of the rear axle. This turned out well and the overall proportions ended up looking right.  Because the back axle is split into two then I needed two sets of brakes, one each for the left and one for the right half axle.
-The brakes are standard Mountain Bike hydraulic brakes which work great and much better than cable brakes. The only issue is balancing them both so that the operate equally together.
-The motor is mounted so that it can be rotated 180 degrees to provide drive to either the LH or RH axle depending on the track direction (clockwise or anticlockwise), this means that ACDC is configured as a single wheel drive racer.  This has its advantages and disadvantages, the advantage being that the car needs no diff and there aren't any steering issues like you typically get with a fixed rear axle configuration; the disadvantage is that there's usually one corner on the circuit where the wheel lifts, spins and you lose drive. But overall, single wheel drive works really well.
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