RadioCraft 35% Extra CG
05-26-2003 | 03:50 PM
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From: Bowie,
MD
RadioCraft 35% Extra CG
Hey Guys-
I have a RadioCraft 35% Extra 330LX, and have a lot of flight time on it. It weighs 24 lb with a BME 102 Evo. It does sequence very well right now. I have not experimented with moving the CG forward, but moving it any further back is no good. It is currently about 1/2" behind the bottom sheeting on the fuse with the wings off and everything else on (hatch, prop, spinner). It does sequence well as far as i can tell (i have won 3 contests with it), but can not do upright elevators or harreirs. I saw Rob Sarlan's do upright 3D, but he crashed his before I could ask him to measure it. I know it was pretty far back though. I was wondering if someone could give me where their CG was that got it to do upright 3D. thanks
Jonathan Baker
I have a RadioCraft 35% Extra 330LX, and have a lot of flight time on it. It weighs 24 lb with a BME 102 Evo. It does sequence very well right now. I have not experimented with moving the CG forward, but moving it any further back is no good. It is currently about 1/2" behind the bottom sheeting on the fuse with the wings off and everything else on (hatch, prop, spinner). It does sequence well as far as i can tell (i have won 3 contests with it), but can not do upright elevators or harreirs. I saw Rob Sarlan's do upright 3D, but he crashed his before I could ask him to measure it. I know it was pretty far back though. I was wondering if someone could give me where their CG was that got it to do upright 3D. thanks
Jonathan Baker
05-26-2003 | 11:34 PM
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From: Doylestown,
PA
cg
Hi Jon,
Last time I checked mine when hung from the wing tube it would very slowly fall towards the tail... I've added wheel pants and moved my batteries forward just slighty so I would suspect its about right on the wing tube. For elev throw I have 50 degrees up and 38 down and 70% expo. What I have noticed with this plane is for harriers both upright and negative you need to change the amount of elev constantly to keep the same attitude. This changes for elevators and a more constant elevator stick position can be held.
I hope this helps a bit - what does the plane do when you do a harrier?
-Jon L
Last time I checked mine when hung from the wing tube it would very slowly fall towards the tail... I've added wheel pants and moved my batteries forward just slighty so I would suspect its about right on the wing tube. For elev throw I have 50 degrees up and 38 down and 70% expo. What I have noticed with this plane is for harriers both upright and negative you need to change the amount of elev constantly to keep the same attitude. This changes for elevators and a more constant elevator stick position can be held.
I hope this helps a bit - what does the plane do when you do a harrier?
-Jon L
05-28-2003 | 04:15 PM
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From: Bowie,
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My plane is getting better
Today i flew the plane, and it decided that it wanted to do harriers upright. I changed nothing at all, and the conditions (wind, temp) were identical to the last time i flew it. I was amazed, and so happy that i could add that to my little freestyle to impress all the .40 size guys who still think 3D is some sort of magic.
It must have heard my threats to get rid of it, so it decided to do harriers. It also didn't mind having the tail dipped in some foot-high grass in a torque roll for a few minutes straight. Who knows what it will do next time...
RudderMagic-
In the harriers, upright and inverted, you have to give it an inconsistent amount of elevator to keep it high alpha. I think it has to do with the airspeed after turning and being into the wind, but it did surprise me a lot when i had to let go of the elevator, yet it stayed high-alpha, and other times i was flooring it. Weird, but those are beautiful inverted, and low (i mean to say my rudder was less than 2 feet from the ground in this inverted harrier). Try it, you can get used to inputtig different amounts of elevator once you find when it needs it.
Low and Slow is the Only way to go
Jonathan Baker
It must have heard my threats to get rid of it, so it decided to do harriers. It also didn't mind having the tail dipped in some foot-high grass in a torque roll for a few minutes straight. Who knows what it will do next time...
RudderMagic-
In the harriers, upright and inverted, you have to give it an inconsistent amount of elevator to keep it high alpha. I think it has to do with the airspeed after turning and being into the wind, but it did surprise me a lot when i had to let go of the elevator, yet it stayed high-alpha, and other times i was flooring it. Weird, but those are beautiful inverted, and low (i mean to say my rudder was less than 2 feet from the ground in this inverted harrier). Try it, you can get used to inputtig different amounts of elevator once you find when it needs it.
Low and Slow is the Only way to go
Jonathan Baker
