3 rotor 12A
 

I'm working on a project, I posted in tbe 20b section and didn't get a response. I have all the easy to get parts for a 3 rotor, now I need help with the modified center plate, crank, long bolts, and dowels. I found a guy in the UK who will help me with the center plate, but the e-shaft is the problem. Are there any shops in the US that can make one for less than $4000? Any input on this project would be awsome.

Cool project, but I don't think you'll be able to do it for less than 4k.

It would have to be a custom E-shaft. and custom counter weights.

You might be able to mill a 20B center iron and a 12A stationary gear.


If you wanna be cheap... Look at this..
https://forums.24hoursoflemons.com/v...ic.php?id=3567
One of the pictures on this thread is two 12A's bolted together.

That might be the best option for you. The only challenge there is getting oil to each engine and supporting them so they are in line with one another. And counter weighting them.

I saw that 4 rotor, kinda neat. This project is going to be expensive but im not too worried about it. The e-shaft is the most expensive part, billet rotary is the only place that I know of that makes a short shaft based on a 12a. So I'm trying to find more shops that make them.

Have you tried PPRE in NZ? They've been known to do some crazy things with multirotors.


edit, just saw this; https://www.billetrotary.com.au/eccentric-shafts

never heard of them before though.

Yea I'm finding out that its also hard to find parts for 12a based engines. so that doesn't help cost at all. I will try ppre.