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My first 3D plane needs some help

Old 02-27-2011, 06:53 AM
  #1  
Catalina
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Default My first 3D plane needs some help

Hi, firstly this is my plane and set up

Plane: http://www.hobbyking.com/hobbycity/s...dProduct=10519

Motor: http://www.hobbyking.com/hobbycity/s...idProduct=3886

Prop: http://www.hobbyking.com/hobbycity/s...dProduct=10910

Servos: http://www.hobbyking.com/hobbycity/s...idproduct=6608

Battery: http://www.hobbyking.com/hobbycity/s...idproduct=9497

Im hoping there are some experts that can give me a bit of advice.
The plane flys great in every way except for one.
When doing a diving left bank and turn, I cannot pull out of it, I go full right alerion to straighten up but it just cant do it, it takes a long time to pull out and has nearly caused a crash a number of times. The servos I use have high torque and there seems nothing wrong with them at all. I think that it is the amount of torque roll from this motor/prop setup that means I cant pull out of it. Is there anything I can do? is it normal with a large 3d motor/prop combo? This is my first attempt at 3d planes.
When flying straight slow or fast, I can back left/right without any issues.
Any help would be great as I am even thinking of selling the plane and not worrying about 3D.
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Old 02-27-2011, 07:00 AM
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lucas2696
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If anything the torque of the motor would help you come out of a left bank wouldn't it?
I don't really like those HK foamys, just don't ever seem really well thought out, I can do that by myself.
It could just be a thing for that plane, foamys do weird things, because they're all flexible. Also, they aren't designed to fly fast, AT ALL. WEIRDER things tend to happen when you fly a foamy fast, but they do fine in their flight envelope, mostly HA flying.
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Old 02-27-2011, 07:04 AM
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Catalina
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Originally Posted by lucas2696 View Post
If anything the torque of the motor would help you come out of a left bank wouldn't it?
I don't really like those HK foamys, just don't ever seem really well thought out, I can do that by myself.
It could just be a thing for that plane, foamys do weird things, because they're all flexible. Also, they aren't designed to fly fast, AT ALL. WEIRDER things tend to happen when you fly a foamy fast, but they do fine in their flight envelope, mostly HA flying.
I may have it arse about, I couldnt remember which turn was OK and which ones wasnt. All my other HK foamys flys great (I have 5 of them) but this was my first 3d type.
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Old 02-27-2011, 07:07 AM
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Originally Posted by Catalina View Post
I may have it arse about, I couldnt remember which turn was OK and which ones wasnt. All my other HK foamys flys great (I have 5 of them) but this was my first 3d type.

Well, by foamys I meant 3D profile types.
But anywho, I think it's just one of those weird flat foamy things, just slow it down and you'd probably be fine.
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Old 02-27-2011, 10:48 AM
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CHELLIE
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Originally Posted by Catalina View Post
Hi, firstly this is my plane and set up

Plane: http://www.hobbyking.com/hobbycity/s...dProduct=10519

Motor: http://www.hobbyking.com/hobbycity/s...idProduct=3886

Prop: http://www.hobbyking.com/hobbycity/s...dProduct=10910

Servos: http://www.hobbyking.com/hobbycity/s...idproduct=6608

Battery: http://www.hobbyking.com/hobbycity/s...idproduct=9497

Im hoping there are some experts that can give me a bit of advice.
The plane flys great in every way except for one.
When doing a diving left bank and turn, I cannot pull out of it, I go full right alerion to straighten up but it just cant do it, it takes a long time to pull out and has nearly caused a crash a number of times. The servos I use have high torque and there seems nothing wrong with them at all. I think that it is the amount of torque roll from this motor/prop setup that means I cant pull out of it. Is there anything I can do? is it normal with a large 3d motor/prop combo? This is my first attempt at 3d planes.
When flying straight slow or fast, I can back left/right without any issues.
Any help would be great as I am even thinking of selling the plane and not worrying about 3D.
That has happened to me too, EPP Foam is very spongy, and twist a lot, when your in a dive and trying to turn or go up, the fuselage has twisted and is affecting your tailfeather control surfaces, what helped me is to add depron foam stiffeners to the fuselage like the pic below, if you grap the front and rear of the plane, and twist it, you will see what i mean use depron as it is stiffer than EPP foam, buy a profile plane thats made of depron, they fly better, because they dont twist as much or at all, also use some CF tube or rod, and brace the rudder to the stabilizer, or use some good string to keep them from flexing, hope that helps, Chellie






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Old 02-27-2011, 11:31 AM
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here is my Depron profile 3D plane, it will take all the abuse i throw at it

[media]http://www.youtube.com/watch?v=wz5ilV8jQRM&feature=user[/media]
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Old 02-27-2011, 11:44 AM
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Chellie,
Thanks also for responding. This plane that I have has a huge hollow square section aluminium bar that runs from nose to tail. It also has two big carbon rods in the main wings and 2 smaller ones in the rear wings.
That was the reason I purchased this plane because it is not meant to twist like the others due to the alaimainum bar.
Maybe I shouldnt fly a 3d plane like a normal plane. Im used to just flying in fast and low etc.
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Old 02-27-2011, 11:55 AM
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Normally 3D planes are not ment to fly fast, I bought a 3D profile plane made from a spongy foam, and it did not like speed at all when i turned left, Going fast, it would just spiral down, untill it slowed down, check all of your control surfaces and tail feathers to see if they flex, and if not, then its just the Design of the plane, and it has its limitations, Take care and have fun, Chellie
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Old 02-27-2011, 12:19 PM
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Catalina
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Originally Posted by CHELLIE View Post
Normally 3D planes are not ment to fly fast, I bought a 3D profile plane made from a spongy foam, and it did not like speed at all when i turned left, Going fast, it would just spiral down, untill it slowed down, check all of your control surfaces and tail feathers to see if they flex, and if not, then its just the Design of the plane, and it has its limitations, Take care and have fun, Chellie
Yeah, thats where I am at at the moment too Chellie. I think its just the plane design. I have to have a lot of trim adjustment on the ailerons to get it to fly straight (am assuming because of big prop and big motor).
Well, I now am wondering should I try and learn 3d stuff? Or chuck it in and sell it. Is 3d all that fun? I think flying fast inverted 3 ft above the ground is fun but is hovering in one place fun?
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Old 02-27-2011, 03:02 PM
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Originally Posted by Catalina View Post
Yeah, thats where I am at at the moment too Chellie. I think its just the plane design. I have to have a lot of trim adjustment on the ailerons to get it to fly straight (am assuming because of big prop and big motor).
Well, I now am wondering should I try and learn 3d stuff? Or chuck it in and sell it. Is 3d all that fun? I think flying fast inverted 3 ft above the ground is fun but is hovering in one place fun?

It's a different ball game altogether. I have a few old style fun fly planes that just love to fly low and fast and all that, but I also have a 40 size 3D profile that I huck around too as well as many 3D foamies. The nice thing is the 40 size profile fly really well on wing as well as in high alpha.
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Old 02-27-2011, 04:36 PM
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OK, I am going to open a Can Of WORMS here IMHO When it comes to 3D NOTHING Beats BALSA yes i like Foam, I Love Depron, But Balsa is the best

http://www.skyhighhobby.com/plane-pictures


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Old 02-27-2011, 04:42 PM
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Here here!
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