Why 30mm wide main frame??

[Tripler]

Just a thought,
why are all, (excluding electric helis.)
designed to have very narrow main frames i.e. 30mm when the tank width has to be a certain size to contain enough fuel for reasonable flight time.
It makes wiring servo and battery location harder to install.
Seems a bit silly when the canopy has to be wide enough to streamline the air past the tank and main gear.

[Tom Burgess]

600, 700, Rave ENV, Vibe 90............. all have wide frames???

[Steve]

I think my Xcell 90 has the narrowest frame set I've ever seen - I'll measure them later. The simple idea behind narrow frames is for rigidity. It also makes the fuselage more robust in a crash as there could conceivably be less bending moments at impact.

Edit: Measured now - my Xcell 90 frames have a 20mm gap.

[Tripler]

I think my Xcell 90 has the narrowest frame set I've ever seen - I'll measure them later. The simple idea behind narrow frames is for rigidity. It also makes the fuselage more robust in a crash as there could conceivably be less bending moments at impact.

Ahh, that makes sense

[3d_willz]

i think the thinner frames can resist the torsional stress better. could be wrong though

[Tripler]

600, 700, Rave ENV, Vibe 90............. all have wide frames???

Thanks Tom
Was just a thought,, must stop this thinking lark, gets me into trouble