Hey All,


I've just bought and started building a Chris Foss WOT 4 (Ripmax ARTF version). The model is advertised that it accepts a .40 - .53 sized engine.

I am using an OS 46LA but it won't fit the plane. The plane comes with a pre drilled firewall so it's not easy to adjust.

I have been to the LHS where I purchased and bought another mount. Adjustable and labelled to be for that plane.

That won't fit either. I believe that with the predrilled holes where they are they that engine won't fit at all.

I consider my options to be:

1) Buy a bigger engine (No go as i'm on a tight budget)
2) Try an exhaustive search for a mount that will accommodate the engine.
3) Re-drill / Hack the firewall so I can re-locate the mount. Not ideal as there will be implications on thrust, i'm not a seasoned builder so I don't want to do this (I'll mess it up )

I'm quite annoyed at this as the plane is marketed as ARTF and suitable for my engine. I'm going to the LHS again tomorrow and if they can't get a mount to fit i'm going to argue the plain is unsuitable and look for a refund / replacement model. Do you guys things I have a chance, is this common?

Thanks in advance for any guidance

Here is a pic of the problem on hand: