sorry stupid question - RC Groups
Thread Tools
Feb 02, 2013, 06:59 AM
Heli nut " the wife said so "
holtneil's Avatar

sorry stupid question

hi all i need to ask this so sorry its a stupid question but when you look at helis to buy eg align t-trex they say 250,450,600.700 so this must be the size ? if it is is it cm or mm and where is the measurement taken from kind regards neil
Sign up now
to remove ads between posts
Feb 02, 2013, 07:16 AM
Registered User
I don't think so

Feb 02, 2013, 10:50 AM
Registered User
I've read somewhere the size is related to the length of the rotor blade. but there are a lot of exceptions to that thought.
Feb 02, 2013, 10:55 AM
Cranky old fart
Balr14's Avatar
The size was originally related to motor size required to power the heli when they used brushed motors, up to 500 size anyway. I tried to see if the size had any correlation to gas engine size 30 years ago but didn't find anything.

Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Question probably a stupid question mikeydrc Batteries and Chargers 4 Jan 29, 2013 01:29 AM
Discussion I know, I know stupid question about about World Tech Hercules Helo drtuvoc Coaxial Helicopters 1 Jan 26, 2013 09:40 PM
Discussion Newbie stupid, stupid question crashcorrigan Coaxial Helicopters 59 Jul 18, 2007 10:34 PM
Question Sorry in advance, Really stupid question... Mendnwngs 3D / Fun Fly Fuel Planes 91 Aug 28, 2004 06:25 PM
stupid stupid question Ænima Aerial Photography 7 Feb 27, 2004 05:35 PM