Brushless 180D with DD VP Tail

[Raygun]

Hi This is the picture of my all brushless DD tail with a trex 250 VP tail and servo on my 180D. It has a 3200KV brushless main thanks to Sol. and a trex 250 tail parts thanks to Dave. The tail motor is a 2900KV C10. The radio is a DX6I and a 6110 RX. Thanks to Sol again for giving me a hell of a deal on the radio

[Raygun]

This next picture is the main motor and the new gear I took out the stock gears because you cannot find pinions for them and the teeth are so fine they strip very easy. So I purchased RC truck gears and machined a hub to fit the gear face is twice as wide.. I can now use 64 pitch or 0.4 mod pinions. I also vacuum formed a box to house the ESC's and all connections.

[Raygun]

This next picture shows the servo I mounted it where the brushed motor use to go and made my own mount to cover the wires as well, the servo is a Dynam 7 gram servo very nice servo two for $4 at xheli.

[Raygun]

This picture shows the Head Lock Gyro I mounted it in a cubby hole just under the main gear and above the landing gear I used a balanced connector for the servo to save room. It is a telebee 6 gram gyro.

[Raygun]

This picture shows the VP slider and tail motor the brass center is something I machined so the blade grips had more support and I could setscrew it to the shaft the dynam parts screw onto the shaft and I could not use that.. I used a shaft from a 380 brushed motor and put it in a C10 brushless motor from strong motors Don the owner is very helpful. The motor only weighs 8 grams and is 2900KV. I have this plugged into the Aux channel and slaved to the throttle it has enough RPM I adjusted the gain on it down.

[Raygun]

This photo shows the stock tail parts and the modified tail part with the armature. There was not enough room in the stock two halves so I used two of the left halves of the tail and bolted them together. The motor fit right in and I left the bearing in the left side half for more support and as a thrust bearing.

[Raygun]

This next shot shows the armature pressed into one half and the bell with the extended shaft about to go on.

[Raygun]

And this last photo shows the back view you can see the servo rod just fits through everything. The motor looks big in the photo but is about the size of a penny. This thing flys so perfect its hard to believe compared to what it did when it was new. It is a little heavier I installed bigger esc's than I probably had to and a 1280MAH battery stock weight is about 290 this weighs with the superskids about 306. Thanks To Dave, Sol ,19000 ,elkmaster, AKent and Ernie M. and to anyone else I peppered with questions. My next project will be one belt driven on the tail but I dont think it could fly any better this is so stable it is almost boring.. I want to try this on a Blade SR......Ray

[McKrackin]

That is freakin brilliant.I wish I still had the SR now.

[Solitaire]

Well, I've said it before and I'll say it again...
That tail slider mechanism using the motor shaft extension is pure genius, Ray.

Maybe a closer pic would be in order. I'm still not sure of the complete mechanics behind that.

[19000rpm]

Absolutely beautiful work.

[Raygun]

The tail slider works the same as it would if it was belt or shaft driven I just installed a longer shaft into the brushless motor to make it work.. Ray

[elkmaster01]

I second that,,,BRILLIANT. Good imagination and great fabrication skills.

Ever think of doing a DD tail on a 500?

One question,,,if you have the tail motor slaved to the throttle channel,,,do you have gyro gain issues at lower rpms? And I assume you have everything running off one battery,,yes?

That thing is very interesting!!

Can you get a video of it in the air?? I'd like to hear what it sounds like too.

Great work Ray!!

[Raygun]

No issues at low rpm or high what you can do is program the TX or the esc for the tail motor to raise its RPM quicker but I found at full RPM the servo has a tough time pulling that much thrust. I dont know what the 250 trex tail is spinning at but this one at full rpm is at 21,460 on two cells. You probably could run the tail at one rather high steady RPM and let the servo do the rest, and yes I am using one battery and what does it sound like?? It sounds like a really pissed off hornet!!! Ray

[McKrackin]

The Trex 250 tail turns 4.67 times faster than the main rotor.
I'll get the math and be right back.