HemiStorm RC - Chris de Graaf

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HemiStorm RC - Chris de Graaf
Halden, Norway

General Information

The X-Carve enables me to build what most likely is one of the craziest RC cars in the industry. Starting from an Axial Yeti XL base, I’m stretching the chassis, reconnecting both halves together using a Delrin 6mm bottom plate, 2mm carbon uprights and custom motor bracing.

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Material Description Price
Black Delrin® Sheet

Black Delrin® Sheet

Dimensions: 12 in × 24 in, Thickness: 1/4 in, Color: Black

$50.56

Carbon Fiber Sheet

Carbon Fiber Sheet

Dimensions: 250mm × 400mm (+5mm/-2mm), Thickness: 2mm, Color: Black, Weave: 3k, Layers: 14

$86.30

$136.86
from Inventables

1

Hack up two RC cars

120 minutes

The Axial Yeti XL is one of the hottest RC cars of the moment. By stretching the chassis I want to double the power. I want to make enough room for two transmission cases, two motors, two speed controllers and four 3S batteries. Basically double up on everything to get an insane power to weight ratio. The first step involves a lot of guesswork. Add tape om the cutline of the chassis halves. Dare to cut, using a hacksaw. I’m sure the video will explain a lot more.

2

Machine the bottom plate

60 minutes

To connect the two halves together, I will be using a 6mm delrin sheet. To make sure the fitment is correct, I make a test run wih a pizza box before machining the material itself. In the final product I added logos and a magnified finger print, to make it a more visually appealing piece. All these files are available seperate. To get the basic construction, just use the file to machine the top, the outline and the holes.

Chassis thinning, machined on top:
http://easel.inventables.com/projects/3-iK5SHJCjdm4EDTzVJjag
Chassis logos:
http://easel.inventables.com/projects/oRppTTHoLGFVMS-WRK5DHA
Chassis outline:
http://easel.inventables.com/projects/UNAEKwhcjiYaUJAvLP-oHw
Chassis holes:
http://easel.inventables.com/projects/It39tO9vtlBo6FoTrzSGcg
Countersunk holes:
http://easel.inventables.com/projects/evDjbp3oGseAUiBnJhJ03w

3

Machine the Carbon uprights and top bracing

90 minutes

I made twin vertical braces alongside the battery trays, plus a backbone that will avoid torque twist on the chassis. All these parts use either logical places to drill holes in the chassis halves, or original mounting positions for the various mechanical parts already installed in the vehicle. End specs of the car: 7.1 kg versus 5.8 kg in non strectched version, double motors, double transmissions, and double battery space. Taller gearing, higher top speeds, and even a dig setup in which front and rear drive can be adjusted on the fly all make this a unique vehicle with a lot of potential.

Right upright:
http://easel.inventables.com/projects/P8xS6ifZNnQy4qoeztg9Vg
Left upright:
http://easel.inventables.com/projects/gh4m_lgE9oahEgWjnEX0tw
Top bracing:
http://easel.inventables.com/projects/uFEWkUVhHpkf_xlEdtH8Jw

Lee Pinney
Thanks again for sharing your amazing work Chris.
Lee Pinney