New build old electronics

jbelokur

New member
Hello all.
Several years ago I got into RC planes using the foam kits you can buy, which were just becoming a thing. I have a motor, esc and servos for an old plane, that work, and would like to see if anyone knows if they would work on this new plane.

What I have:
motor: Grayson Microjet V3 (I also have a bunch of 6x4 props I know the plans call for bigger props, but I'm not sure if this motor could handle them.)
ESC: 30a
Battery: 3S 1800mah
Servos: Corona CS-929MG 2.2kg / 0.10sec / 12.5g


What I want to use it on:
Flight Test, FT Tutor MRK2

The other option was the Might Mini Tutor of thiers.

Thank you!!!
 

quorneng

Master member
jbelokur
The Grayson Microjet V3 has a high 2300 kV making it a high speed motor. Even a 6x4 is about the maximum it can handle. Max amps is 20. See here
The recommended motor for the FT Tutor (Radial Power Pack B v2) has a much lower kV of 1050. It rotates slower so can can handle bigger props and is rated for a max of 25A.

With the Grayson Microjet V3 the Tutor will be a bit under powered but could still be flyable.
 

Houndpup Rc

Well-known member
Hi! So I don't think the motor that you have will work very well with the full sized Tutor being as you have a bigger battery, and having a smaller propeller like that you won't have much torc for speeding up. It would definitely work with the tiny tutor but the FS is probably easier to fly unless you have zero wind but even so bigger planes are generally easier to fly, and you couldn't add ailerons on that model also you would have to get a smaller battery. If it was me I would go for the FS (full size) and get a bigger motor. here is a motor that would work for you with the FS tutor, it will also work with your battery and esc! It's power range is about half way between the B pack and C pack. (I would go with the 1180kv model)

 

Houndpup Rc

Well-known member
jbelokur
The Grayson Microjet V3 has a high 2300 kV making it a high speed motor. Even a 6x4 is about the maximum it can handle. Max amps is 20. See here
The recommended motor for the FT Tutor (Radial Power Pack B v2) has a much lower kV of 1050. It rotates slower so can can handle bigger props and is rated for a max of 25A.

With the Grayson Microjet V3 the Tutor will be a bit under powered but could still be flyable.
He has a 1800mah 3s, I don't know with that heavier battery how doable that would be.
 

Foamforce

Elite member
If you just swapped the motor with a 1000kv motor, which is $7-25 depending on the quality, then you‘d have a B power pack which is used in most of the swappable series.

You could use what you have in most of the smaller B pack swappables, but you’d have less thrust than normal, so it would be a little more challenging to fly, but certainly not impossible. You could also use what you have in many of the planes that take an A pack, as long as it had a large enough fuselage for the larger battery and ESC. For example, you could get away with that setup in one of the new Mini Explorers with minor modications.

But if you’re inexperienced, then I’d say just get another motor, and then build any plane that says it uses a B pack. You’re looking for a 2212 motor with a 900-1200kv rating and a 9 or 10 inch prop. The motors they sell at Flite Test are top notch. If you need something very inexpensive, the SunnySky X2212-13 980kv from Valuehobby is cheap.
 

Houndpup Rc

Well-known member
If you just swapped the motor with a 1000kv motor, which is $7-25 depending on the quality, then you‘d have a B power pack which is used in most of the swappable series.

You could use what you have in most of the smaller B pack swappables, but you’d have less thrust than normal, so it would be a little more challenging to fly, but certainly not impossible. You could also use what you have in many of the planes that take an A pack, as long as it had a large enough fuselage for the larger battery and ESC. For example, you could get away with that setup in one of the new Mini Explorers with minor modications.

But if you’re inexperienced, then I’d say just get another motor, and then build any plane that says it uses a B pack. You’re looking for a 2212 motor with a 900-1200kv rating and a 9 or 10 inch prop. The motors they sell at Flite Test are top notch. If you need something very inexpensive, the SunnySky X2212-13 980kv from Valuehobby is cheap.
I have heard the opposite about FT motors! But you can't believe every video you you see on YouTube! I have never had a FT motor so you would probably know better.
 

Houndpup Rc

Well-known member
Hi! So I don't think the motor that you have will work very well with the full sized Tutor being as you have a bigger battery, and having a smaller propeller like that you won't have much torc for speeding up. It would definitely work with the tiny tutor but the FS is probably easier to fly unless you have zero wind but even so bigger planes are generally easier to fly, and you couldn't add ailerons on that model also you would have to get a smaller battery. If it was me I would go for the FS (full size) and get a bigger motor. here is a motor that would work for you with the FS tutor, it will also work with your battery and esc! It's power range is about half way between the B pack and C pack. (I would go with the 1180kv model)

Or for just a bit more you could get this motor. it works for the C pack size and it will work on your 30a esc! however it has not lasted the longest for me but I tend to really work my motors!
 

Merv

Moderator
Moderator
...What I have:
motor: Grayson Microjet V3 (I also have a bunch of 6x4 props I know the plans call for bigger props...
No, I would not use a larger prop. You will likely burn out the motor or ESC

You might look at the FT F22. That Grayson motor was used on RC Powers F22, which was a bit small for that plane. The FT F22 is a bit smaller than RC Powers version. I would think your Grayson motor will be about the right size for the FT version.

The FT cub will also be a good fit.
 

Houndpup Rc

Well-known member
Hi! So I don't think the motor that you have will work very well with the full sized Tutor being as you have a bigger battery, and having a smaller propeller like that you won't have much torc for speeding up. It would definitely work with the tiny tutor but the FS is probably easier to fly unless you have zero wind but even so bigger planes are generally easier to fly, and you couldn't add ailerons on that model also you would have to get a smaller battery. If it was me I would go for the FS (full size) and get a bigger motor. here is a motor that would work for you with the FS tutor, it will also work with your battery and esc! It's power range is about half way between the B pack and C pack. (I would go with the 1180kv model)

Oops. the shipping is like $20 right ( I don't remember it being that expensive at Christmas:unsure:) now. So here's a link to it somewhere else at one of my favorite online stores and they carry the same motor and shipping is a lot better!
 

Piotrsko

Master member
Heed well the advise of @quorneng. I thought he was wrong once, but he pointed out I was mistaken.

Sometimes you gotta go with what you have. Miss Frostie used to say "You want what you want, but, you get what you get, get over that"
 

jbelokur

New member
No, I would not use a larger prop. You will likely burn out the motor or ESC

You might look at the FT F22. That Grayson motor was used on RC Powers F22, which was a bit small for that plane. The FT F22 is a bit smaller than RC Powers version. I would think your Grayson motor will be about the right size for the FT version.

The FT cub will also be a good fit.
That plane is actually what I ran these electronics on.
 

jbelokur

New member
Oops. the shipping is like $20 right ( I don't remember it being that expensive at Christmas:unsure:) now. So here's a link to it somewhere else at one of my favorite online stores and they carry the same motor and shipping is a lot better!
Thank you for your replies. I'll look at that motor.
 

jbelokur

New member
Hi! So I don't think the motor that you have will work very well with the full sized Tutor being as you have a bigger battery, and having a smaller propeller like that you won't have much torc for speeding up. It would definitely work with the tiny tutor but the FS is probably easier to fly unless you have zero wind but even so bigger planes are generally easier to fly, and you couldn't add ailerons on that model also you would have to get a smaller battery. If it was me I would go for the FS (full size) and get a bigger motor. here is a motor that would work for you with the FS tutor, it will also work with your battery and esc! It's power range is about half way between the B pack and C pack. (I would go with the 1180kv model)

What size prop would you use with this motor?