Help! suggestions for trainer scratch build before i fly it

badpilot27

Member
I'm making this trainer for what I hope to be the first rc plane I am actually able to fly (I made a trainer before but it needed a lot of space to fly and I never got a good flight with it). I just want some suggestions on it before I actually mount the wing and fly it
1740779659505.png

(wing is placed about where it would be mounted)

The plane has a 60 in wingspan and I'm using a small 1400mah 2s battery and a 2200kv motor turning a 7x5 prop.

only thing I'm a little bit concerned about is not having enough thrust, battery life, and maybe the tail not being long enough.
 

Houndpup Rc

Master member
I'm making this trainer for what I hope to be the first rc plane I am actually able to fly (I made a trainer before but it needed a lot of space to fly and I never got a good flight with it). I just want some suggestions on it before I actually mount the wing and fly it
View attachment 248848
(wing is placed about where it would be mounted)

The plane has a 60 in wingspan and I'm using a small 1400mah 2s battery and a 2200kv motor turning a 7x5 prop.

only thing I'm a little bit concerned about is not having enough thrust, battery life, and maybe the tail not being long enough.
Is it just the picture or is the vertical stabilizer not straight with the fus.?
 

Houndpup Rc

Master member
I'm making this trainer for what I hope to be the first rc plane I am actually able to fly (I made a trainer before but it needed a lot of space to fly and I never got a good flight with it). I just want some suggestions on it before I actually mount the wing and fly it
View attachment 248848
(wing is placed about where it would be mounted)

The plane has a 60 in wingspan and I'm using a small 1400mah 2s battery and a 2200kv motor turning a 7x5 prop.

only thing I'm a little bit concerned about is not having enough thrust, battery life, and maybe the tail not being long enough.
Yeah, thrust might be an issue...But what the worst that can happen! lol Maybe just try it and find out. you should be fine for battery life at least until you want to upgrade. this is more of a slow fly style of plane so a 2200kv is not an ideal motor something like a 2218 1180kv would be better, but like I said what the worst that will happen.....If it's too small it won't fly.
I suggest waiting for a day that's less wind before you maiden because its easier to fly a plane with low thrust in low wind than high winds.
 

badpilot27

Member
Yeah, thrust might be an issue...But what the worst that can happen! lol Maybe just try it and find out. you should be fine for battery life at least until you want to upgrade. this is more of a slow fly style of plane so a 2200kv is not an ideal motor something like a 2218 1180kv would be better, but like I said what the worst that will happen.....If it's too small it won't fly.
I suggest waiting for a day that's less wind before you maiden because its easier to fly a plane with low thrust in low wind than high winds.
if i get a larger battery what would you recommend? i was maybe thinking about getting a 1400mah 3s lipo since thats what we're using at my school rc club but im not totally sure.
 

Jo's squadron

Elite member
2200kv motor will not work well. It will drain your battery in 1min!
Remember this - a fast plane has more kv a slow plane has less kv (I'm guessing your plane will fly very slow).
 

badpilot27

Member
2200kv motor will not work well. It will drain your battery in 1min!
Remember this - a fast plane has more kv a slow plane has less kv (I'm guessing your plane will fly very slow).
yeah im getting a new 110kv motor for it. the plane has a wing cube loading of 3.19 so i yeah its for low speeds
 

badpilot27

Member
depends, if you want it to fly slow then go for the smallest battery all the way forward. but I think a 2200mah 3s would work, and you would have more flight time.
yeah i might go with 2200mah lipo. the plane already has a wing cube loading of 3.19 so i can afford to add some weight
 

Shurik-1960

Well-known member
Last summer, with a wind of 4 m/s, I flew 57 minutes on a Cessna 150 aircraft with a flight span of 1 meter.The flight weight of the model is 340 grams, the battery weight is 80 grams. I planted the model - my neck just hurt and I was tired of soaring in the sky. Therefore, it is necessary to specify: 1. The weight of the model; 2. The brand of the engine or a reference to it; 3. The weight of the model with the battery. After that, we will give the right advice. http://rc-aviation.ru/cessna-150#comments - Google Translate will help you.
 

alan0043

Elite member
yeah i might go with 2200mah lipo. the plane already has a wing cube loading of 3.19 so i can afford to add some weight

I have a question for you. Have you done a glide test on this plane ? I understand, if the plane glides, it can fly. Good luck.
 

Houndpup Rc

Master member
I was doing some hops in the parking lot today and the plane is able to take off at a pretty low speed. broke the nose gear when I panicked a bit and had a bad landing.
That happens to all of us when we start flying:) I think your pulse gets highest when flying for the first time! lol
 

badpilot27

Member
That happens to all of us when we start flying:) I think your pulse gets highest when flying for the first time! lol
yeah lol. i tried some more hops with the new battery and had a hard nose down landing and went under a parked car. the nose almost came off and it kinda looked like a concord droop snoot lol. easy fix though. I'm going to wait until i get the new motor to go out to the field and actually maiden it.