Heli sizes?

[Brian Gifford]

Ok, totally stupid newbie question. Could someone tell me, or point me at a thread, what defines a 450, 500, 700, etc.

Thanks

[David Drew]

Motor size I think. Raptor 30 = 30 size engine, Raptor 50 = 50 size engine. In leccies it's the motor size.

David

[cjcj1949]

Ok, totally stupid newbie question. Could someone tell me, or point me at a thread, what defines a 450, 500, 700, etc.

Thanks

No thats a good question. The closest Ive come to an answer is that their different sizes.

Chris

[David Drew]

It's also the size of overdraught you will need

[chemicalbro]

Motor size I think. Raptor 30 = 30 size engine, Raptor 50 = 50 size engine. In leccies it's the motor size.

David

thats correct when it comes to raptors
But...
a trex 600 isn't called a trex 50 (so i assume they are going by blade size) because if you get a 600e its the same size as a 600 nitro yet they still call it a 600
a 700 aint called a 90 (same assumption again)


who knows what aligns logic in the numbering is, lets just say the bigger the number the bigger the heli

[Brian Gifford]

Motor size I think. Raptor 30 = 30 size engine, Raptor 50 = 50 size engine. In leccies it's the motor size.

David

is that 30 as in .30 cu. in? etc?

Thanks guys for your instant and informative replies.

Alan, seems reasonabe - thanks, mate. There was me expexting some precise numbering system!

[163phil]

is that 30 as in .30 cu. in? etc?

Yes, that's it.


....but 550 is about Rotor size

It looks like another case of unit standardisation

(In gliding, we measure height in feet, speed in knots, and distance in km!)

[David Drew]

My Trex 450 has a rotor disc size of 680mm....so it's not that!

[163phil]

My Trex 450 has a rotor disc size of 680mm....so it's not that!

You're just being awkward David - you've got a .37 in your Raptor 30

[Brian Gifford]

My Brain hurts! I thinks alan's "the bigger the number, the bigger the heli" is about right?

[163phil]

My Brain hurts! I thinks alan's "the bigger the number, the bigger the heli" is about right?

Well, you asked for it

[David Drew]

You're just being awkward David - you've got a .37 in your Raptor 30

My Trex 450 has a rotor disc size of 680mm....so it's not that!
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Think I'll nip out & buy a pair of 225mm blades to keep Phil happy.

I have a OS32 in my scale Bell 47 (50 size) just to be awkward.

[163phil]

Think I'll nip out & buy a pair of 225mm blades to keep Phil happy.

Don't forget the 16 tooth pinion, then we'll see some serious headspeed!