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Author Topic: Best size quad to tackle wind?  (Read 216 times)

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Offline ched999uk

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Best size quad to tackle wind?
« on: May 18, 2017, 22:16:14 »
Still trying to decide on what small quad to build and thought there might be some difference in fly-ability in the wind dependant on size.

So I am hopefully building a quad somewhere between 150 and 210 with reasonable power.

Would a smaller frame with say same weight to thrust ratio be able to stand wind better than a bigger frame or is it absolute thrust that matters?

Cheers for any help.

Offline DarkButterfly

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Re: Best size quad to tackle wind?
« Reply #1 on: May 18, 2017, 23:04:18 »
I fly a 200 sized quad, it rips through wind, loads of fun ~~
Why use 4 motors when you can use 6?

Offline Cheredanine

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Re: Best size quad to tackle wind?
« Reply #2 on: May 18, 2017, 23:28:35 »
I agree with db in the main,
I would add:
Cope with wind:
I have flown racers in all sorts of wind conditions, a good 5inch can cope in terms of aspect superbly,  by that I mean it stays locked at the angle you command, it doesn't wobble or tilt

There is however, another aspect in terms of wind, it blows he quad about, if you fly into it you are slower, if you fly away from it you go very fast, if you tack you tend to drift down wind.

This is mainly effected by two factors
Firstly the speed of the quad, particularly when flying in to the wind, the higher top end you have the better you can handle that

Secondly the frame, I have raced in strong winds, it was fun, but a guy had a vandetta and it simply could not cope, it basically acted as a sail, whereas small pod racer or open frames just zipped about.

The best quads I have for windy conditions are 200ish racers with small or open bodies and underslung batteries. It helps if you run light props as that allows the motors to change speed quicker, making it better at holding aspect

Technically it ought to be possible to give a 6inch a better power to weight ratio, but it will make more of a sail, and most of the motor, prop and general development is around 5inch props, so whilst it may be feasible i suspect it isn't practical with current hardware

Offline Bad Raven

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Re: Best size quad to tackle wind?
« Reply #3 on: May 19, 2017, 06:37:55 »
When I started I bought "big" (in Race Quad terms) "to get stability".  250-280.

I soon started building smaller and realised that 150-160's could carry well and hack wind just as well.

Its all about presenting the most compact profile possible with no "sail" areas and a low centre of gravity within the shape.  (true for ANY flying RC model type)

I slope soar gliders, inc dynamic soaring, and used for many years to windsurf, so am used to "reading" and handling wind. (Not to mention a liking for Baked Beans).

Keep at it and you'll get there!