Re: Callibrating Engine RPM

[David Watts <dwatts@ns1.avnet.co.uk>]

>The optical tachos are unfortunateley a little more than 50 pounds.
>If someone wants to borrow mine at any time, ie drop round and collect it
>and bring it back the next day then that's fine.
>Jerry - Lyndhurst near Southampton

Nobody seems to have mentioned yet that you can get optical tachos that work 
with either 2 or 3 blade props from model shops. These are usually available 
for around 25 pounds sterling.
Dave Watts 229.