4-Max
The Fixed Wing
Electric Flight Specialists

Est. 2007

Electric Setup for Tony Nijhuis
EDF 25" Grumman F9 Cougar
Free Plan in September 2023 RCM&E

Click here to visit Tony Nijhuis Designs

Do not run the 3S version on 4S or above
Do not run the 4S version on 5S or above

There may be some scratches on the inner wall surface of the duct. This happens in the factory testing and balancing process. The scratches have no affect on performance.

We will not accept units back because of this scratching

Please Note Due to having our knuckles severely rapped by the Post Office we can no longer send any kind of battery via the post. Any order containing batteries will have to be sent via courier and this will incur a minimum of a £9.99 delivery and packaging charge.
We cannot deliver batteries outside of mainland UK

3S LiPo Setup

4S LiPo Setup