Homemade engine preheater

[fstnd]

This spare HPI F4.6 engine definetely has a lot of compression but I created this predominantly for my Force r32 which hardly turns with a 3s battery when cold.

The R32 its in a savage, and because of the "roll cage" it is harder to put on the heater but it is possible

with two 7.4v (8.4 when full) 3A batteries it takes 20 minutes for the two heating pads to heat up the engine. Afterwards it feels like holding a cup of tea. The batteries and heating pads are both connected up in series. Just for testing purpose I let them heat for 45 minutes and nothing melted yet
I didn't use hot glue because it would obviously melt at such temperatures. The "base" is made up of 2 layers of an aliexpress mousepad

Why?
-1. The cheapest assembled heater would be €26,- including shipping. I saved €16,- now.
-2. I just wanted to do it. lol

 

[lyonsboy07]

Where did you buy the heaters?

 

[Tunedfrog]

Nice work.

 

[Chubaka]

I need that for my back. Great device for these lil engines in the wild.

 

[fstnd]

Where did you buy the heaters?

Heating pads
https://a.aliexpress.com/_Ezmn2Hj
The specific ad of the one I ordered doesn't exist anymore but I think mine was like 12 or 9v

I need that for my back. Great device for these lil engines in the wild.

Ehh I haven't measured temperatures with tools yet but it quite hurts