Help! I need some advice please.

OnlyCheat

New member
New RC planes hobbyist here, I bought a few old planes off marketplace for cheap. a Hobbyzone Mini super cub, and a Hobbyzone Super cub. The mini flies great, and so did the bigger one, until the throttle randomly stopped working. I'm assuming it is the esc (tested the motor and battery), which I've heard is near unfixable in this plane. So I stripped it down to the fuselage and wings, cause I want to replace every piece of electronics in the thing and make it brushless (I know this is more expensive than a new plane, but it's fun). Anyways, I'm wondering if this list of parts I picked out is going to work? also will a 1300 mah 3s 35c battery be enough to power it, and if so for how long?

Links to all parts:
https://www.amazon.ca/gp/product/B07Z9YNP7S/
https://www.amazon.ca/gp/product/B0799HRLGZ/
https://www.amazon.ca/gp/product/B079CNVCYF/
https://www.amazon.ca/gp/product/B07Z16DWGW/
https://www.amazon.ca/gp/product/B0CC9NQS7J/
https://www.amazon.ca/gp/product/B08GG7QX8J/
https://www.amazon.ca/gp/product/B09TGRP1C4/
 

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mastermalpass

Master member
Had to look up the Supercub to get an idea of its dimensions. Your parts list is quite faithful to the original and should be more than enough. About the battery though; 3S 35C will be adequate power output to fly, but at just 1300mAh, your flight time would be 5 mins max on a very calm flight, but possibly only 3 mins if you wanna have fun or if you have winds to fight against. If the plane has enough room for a 2200mAh, I’d definitely get one for it.

Now, the reason I say more than enough; where does the ESC sit on this plane? Because if it’s somewhere where it gets a good scoop of the prop wash for cooling, you could get away with a 40A ESC and save some money. I’m assuming the previous ESC died from just being old and used up. Also, if the ESC isn’t positioned far from motor, you might not need those ESC wire extensions.

The only doubt I have is that prop; 9inches in diameter is fine, but being 9x6 - I’d say that pitch makes it a bit of a fast-flying prop (wherein a 60A ESC becomes preferable but also), you might prefer a 9x4 or 9x5 for a faster throttle response at slower speeds. Being a bit of a newbie, you might want that. What specs are the original prop? The item I found on Hobbyking doesn’t specify.
 

OnlyCheat

New member
Had to look up the Supercub to get an idea of its dimensions. Your parts list is quite faithful to the original and should be more than enough. About the battery though; 3S 35C will be adequate power output to fly, but at just 1300mAh, your flight time would be 5 mins max on a very calm flight, but possibly only 3 mins if you wanna have fun or if you have winds to fight against. If the plane has enough room for a 2200mAh, I’d definitely get one for it.

Now, the reason I say more than enough; where does the ESC sit on this plane? Because if it’s somewhere where it gets a good scoop of the prop wash for cooling, you could get away with a 40A ESC and save some money. I’m assuming the previous ESC died from just being old and used up. Also, if the ESC isn’t positioned far from motor, you might not need those ESC wire extensions.

The only doubt I have is that prop; 9inches in diameter is fine, but being 9x6 - I’d say that pitch makes it a bit of a fast-flying prop (wherein a 60A ESC becomes preferable but also), you might prefer a 9x4 or 9x5 for a faster throttle response at slower speeds. Being a bit of a newbie, you might want that. What specs are the original prop? The item I found on Hobbyking doesn’t specify.
Hey, thanks for replying! the reason I went with a 60 amp esc is because I want the ability to use 4s on it if I want, and also to have plenty of headroom so it doesn't overheat. The esc is decently far from the motor, so I thought better safe than sorry with the cable extenders. The original prop is 9x6, and I want as much thrust as I can get from it because I want to do aerobatic tricks, maybe even hovering since I think I got the proportions right and have 2 to 1 thrust to weight ratio.
 

mastermalpass

Master member
Hey, thanks for replying! the reason I went with a 60 amp esc is because I want the ability to use 4s on it if I want, and also to have plenty of headroom so it doesn't overheat. The esc is decently far from the motor, so I thought better safe than sorry with the cable extenders. The original prop is 9x6, and I want as much thrust as I can get from it because I want to do aerobatic tricks, maybe even hovering since I think I got the proportions right and have 2 to 1 thrust to weight ratio.

In that case, it sounds like your list is good to go! 🙂
 

quorneng

Master member
OnlyCheat
A 60A ESC is rather generous. From what I found out that motor and 9x6 even on 4s will only take 34A.
As far a I can tell the original 1.2m Super Cub only needed a 1300mAh 3s. Your components are going to add a bit more weight particularly with a 2200mAh 3s. The Super Cub will thus fly a bit faster and need a bit more throttle so using up some of the extra battery capacity but even so should manage a good 8-10 minutes.
 

OnlyCheat

New member
OnlyCheat
A 60A ESC is rather generous. From what I found out that motor and 9x6 even on 4s will only take 34A.
As far a I can tell the original 1.2m Super Cub only needed a 1300mAh 3s. Your components are going to add a bit more weight particularly with a 2200mAh 3s. The Super Cub will thus fly a bit faster and need a bit more throttle so using up some of the extra battery capacity but even so should manage a good 8-10 minutes.
Hey thanks for replying! I added up the full weight of the original components and compared it with mine and it's actually going to be lighter. And I'm going with a higher amp esc cause I may want to convert this plane to another project in the future, and I want a lot of headroom for that.