bogusbandit56
I had some 22mm waste pipe left over from a bathroom installation and four Multistar Elite 2205 2350kva quad motors, I bought very cheaply @ £3.98 each which have built in esc`s and need a flight board to control them. I just looked on the HobbyKing website and they are £23.00 each now. It look`s someones made a mistake or these are probably duff
I had bought them for fixed wing planes but were not suitable and were just sitting in the drawer doing nothing.
I sent off to Banggood for a KK2 board which cost £11.98 (still in the post).
I had to buy 8 tee pieces to put the frame together and was shocked at the price, £1.00 each (ouch). The 3 meter length of pipe was only about 2 quid.
The frame only took about 3/4 of an hour to produce and I am using an empty ice cream container to house the battery and KK2 board.
I decided to route all the wires to the motors through the frame which will take forever
I`m not sure if these little motors are man enough for the job, but I will try it and find out. They claim 450 watts but I highly doubt that, but if they give 300 watts each that should provide enough thrust.
So now I have to find a neat way of mounting the motors after soldering all the connections.
The long landing gear that makes it look like an antique bedstead can be removed, but as I fly in a field with long grass they should be useful.
Wot, no Depron?
Quote 6 0
Wildthing
Quote:
I had some 22mm waste pipe left over from a bathroom installation and four Multistar Elite 2205 2350kva quad motors, I bought very cheaply @ £3.98 each which have built in esc`s and need a flight board to control them. I just looked on the HobbyKing website and they are £23.00 each now. It look`s someones made a mistake or these are probably duff
I had bought them for fixed wing planes but were not suitable and were just sitting in the drawer doing nothing.
I sent off to Banggood for a KK2 board which cost £11.98 (still in the post).
I had to buy 8 tee pieces to put the frame together and was shocked at the price, £1.00 each (ouch). The 3 meter length of pipe was only about 2 quid.
The frame only took about 3/4 of an hour to produce and I am using an empty ice cream container to house the battery and KK2 board.
I decided to route all the wires to the motors through the frame which will take forever
I`m not sure if these little motors are man enough for the job, but I will try it and find out. They claim 450 watts but I highly doubt that, but if they give 300 watts each that should provide enough thrust.
So now I have to find a neat way of mounting the motors after soldering all the connections.
The long landing gear that makes it look like an antique bedstead can be removed, but as I fly in a field with long grass they should be useful.

Looks like a pipe dream

Can you not get end caps of the same pipe material to attach the motors to?
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bogusbandit56
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Looks like a pipe dream

Can you not get end caps of the same pipe material to attach the motors to?

Possibly but if they`re a quid a piece it`s going to bump the build price right up
I will try to find some plastic bottle tops that fit or ask a friend to design some for the 3d printer
Wot, no Depron?
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whatmovesyou
Looks like a fun project. Are you aware that because you built in a "H" fashion, you will need to figure out the scaling factore since 2 motors are at one distance and 2 motors are at another distance from center point.

Point to remember.--Use a pencil with an eraser end to push buttons to program. Adult fingers sometimes miss and hit the button next to it. BAD!!! when programing the wrong feature.

Now that I have a using a number of KK2 boards, working on Tom Sutton's BI-Copter VTOL. Ready to program that monster.
I like to design and fly unique planes.
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bogusbandit56
Quote:
Looks like a fun project. Are you aware that because you built in a "H" fashion, you will need to figure out the scaling factore since 2 motors are at one distance and 2 motors are at another distance from center point.

Point to remember.--Use a pencil with an eraser end to push buttons to program. Adult fingers sometimes miss and hit the button next to it. BAD!!! when programing the wrong feature.

Now that I have a using a number of KK2 boards, working on Tom Sutton's BI-Copter VTOL. Ready to program that monster.

No, I thought the KK2 board does all the thinking for me regarding the motor layout and all that crud.
I was watching a simple H-quad build by Flite Test yesterday and they didn`t have do any special maths.
I hope this won`t be a problem, but having lots of pipe still left over from the bathroom build, (I had to buy 3 meters just for 40cm).
Are you sure you`re not getting confused with a Dead Cat quad layout which needs special calculations?
Wot, no Depron?
Quote 0 0
whatmovesyou
No. What happens is that it will run with 2 motors going fast and 2 slower motors going to hover. Torque is force times distance. Since distance is not equal, more force(faster rpms) is needed.

As you mention above, you might have motors that don't develop enough thrust. What happens if 2 are almost wide open in hover and you call for motion(vertical, roll,pitch or yaw), bet it goes into oscillation. Ask me how I know. Make sure you order enough props , cw and ccw, and use a table in high grass to launch.


I have 5 projects that I have used the kk2 board. This one is STOL where leading edge flaps and rear flaps come down as nose of airplane goes up all automated by elevator gyro. With proper throttle management and nose up, you can hit the sweet spot and come down slow and very steep.

This is picture of kk2 board and what flap(s) look like when deployed. See servos for each flap.
P1010085.JPG 
P1010084.JPG 

One of the 3 VTOL projects when I finally got a good handle on it.
I like to design and fly unique planes.
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bogusbandit56
Quote:
No. What happens is that it will run with 2 motors going fast and 2 slower motors going to hover. Torque is force times distance. Since distance is not equal, more force(faster rpms) is needed.

As you mention above, you might have motors that don't develop enough thrust. What happens if 2 are almost wide open in hover and you call for motion(vertical, roll,pitch or yaw), bet it goes into oscillation. Ask me how I know. Make sure you order enough props , cw and ccw, and use a table in high grass to launch.


I have 5 projects that I have used the kk2 board. This one is STOL where leading edge flaps and rear flaps come down as nose of airplane goes up all automated by elevator gyro. With proper throttle management and nose up, you can hit the sweet spot and come down slow and very steep.

This is picture of kk2 board and what flap(s) look like when deployed. See servos for each flap.
[ATTACH=full]55808[/ATTACH]
[ATTACH=full]55809[/ATTACH]

One of the 3 VTOL projects when I finally got a good handle on it.

Thanks for the advice.
What I did`nt finish saying in my last post is that I have plenty of pipe to make a true quad with motors equal in distance. I just thought the H quad would be easier to orientate as I will not be learning with FPV. I can extend the goal post`s on the quad no problem as I haven`t glued it together.
It is tight fit and when all the wiring is installed I will secure the joint`s with screws so that repairs and alterations can be made.
Wot, no Depron?
Quote 2 0
thunder
Just so you know,,,,the unequal motor powers is rectified in the KK mixer editor section,and the way to test your model is to do a full throttle vertical climb and you will see which motors need to be adjusted.
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bogusbandit56
Quote:
Just so you know,,,,the unequal motor powers is rectified in the KK mixer editor section,and the way to test your model is to do a full throttle vertical climb and you will see which motors need to be adjusted.

Thanks Thunder
Wot, no Depron?
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thunder
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Thanks Thunder

No probs BB, I do like the look of it,,very suave
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bogusbandit56
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No probs BB, I do like the look of it,,very suave

You really mean cheap and cheerful
Which it is.
It looks like I paid too much for the KK2 board I got from Banggood @£11.98.
I just bought 2 KK2 HC`s from hobbyking for £3.98 each plus £1.98 for carriage.
I hope they`re not just empty hard cases.ops:
Wot, no Depron?
Quote 1 0
Wildthing
Quote:
You really mean cheap and cheerful
Which it is.
It looks like I paid too much for the KK2 board I got from Banggood @£11.98.
I just bought 2 KK2 HC`s from hobbyking for £3.98 each plus £1.98 for carriage.
I hope they`re not just empty hard cases.ops:

I hope the ice cream doesn't melt.
Quote 1 0
bogusbandit56
Quote:
Just so you know,,,,the unequal motor powers is rectified in the KK mixer editor section,and the way to test your model is to do a full throttle vertical climb and you will see which motors need to be adjusted.

Is that in the P and I gains?
Wot, no Depron?
Quote 0 0
bogusbandit56
Quote:
I hope the ice cream doesn't melt.

No chance of that dude, I ate the lot before washing and spraying the container chrome
Ice cream £2.25, H-quad canopy free. Bargain!
Wot, no Depron?
Quote 1 0
thunder
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Is that in the P and I gains?

NO,,,i explained where the F/C mixer editor is in a PM I sent you the mixer editor is in the F/C menu and you can adjust several different things including individual motor power.
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