Thank APM&MWC for helping me built a monster(actual is a flying car ^_^)

I made a strange frame, it's not pretty looks, but it really can fly.

It isn't very stable now. I will keep tuning.

My idea is simple, just need one engine take the air into box, then go out from three gas outlet. Three servo control flow rate to make different force. And need a tail blade to control yaw. It's very like CCPM.

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frame: Design by myself
controller/autopilot: APM or MWC
esc: HobbyWing Platinum-60A-PRO
motors: DUALSKY 3548ca-5 850kv
propellers: gws 1045 3-blade
battery: 6S 3600mAh
total weight: about 2000g
radio: Futaba T8FG

This structure can be use all kind of engine, so it probably to build a real practical flying car.

I am not be good at coding, so I just try all kind of FC, try again and again. Now i often use APM and MWC. I want change the code, because this structure can't use the system as same as CCPM, they was liked each other, but not exactly same. Hope you can help me, give some advice to change code of Heli. Thanks.

more detail: http://spoflycar.blogspot.com/

If you are interest to the frame, you can found all source file(sketchup) in svn on my code.google.

Awesome!

I am guessing the control authority is a bit of an issue due to the servos having to counteract the rotation of the propeller, or is this taken into account specifically somewhere in the design?

I have been wanting to make a somewhat similar setup for a few years now, but I was going to use counter rotating propellers, one CW, the other CCW and use the differential as yaw basically like quads do. I have seen some coaxial brushless motors out there, but for some reason I can't find them now.

I think the design would be better if you did use 2 counter rotating motors simply because you can keep the package as compact as it is now, increase airflow/power and you get yaw control and stability without having to use the servos to direct the thrust vector to counteract it, thus you would get more power/airflow also at the same time.

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Comments

wnqwang February 16, 2013 at 2:48am

Thanks ssq870424. 我是江苏的。谢谢您的建议，我去看看。
Bill King February 16, 2013 at 2:24am

I have flied a singlecopter like Honeywell T-hawk. It flies very well indoor.

你哪里人？我qq1063603770，硕士就是做单轴飞机，室内飞的很好了。多交流。这个论坛有个比利时人也用apm做过单轴，你可以查下帖子。
wnqwang February 15, 2013 at 8:07pm

Thanks Mark Lanning. I know performance of this monster is lower. But safety and VTOL is very important in today. Many city's bad traffic let people enough angry even want kill someone. If make a safety VTOL flying car. I guess not many guys care for the Fuel consumption is too high.

I don't know how to calculate it. ^_^ In fact i want go to college to learn this(ex: aircraft design) but apply student visa is too difficulty in china. I have failed once. π_π
wnqwang February 15, 2013 at 7:31pm

Thanks noth666. My English isn't good, hope I have not misunderstood what you meant.

Are you mean:

I had think about this, but it's too hard to make so i used single propeller in concept model.

And i use 2 blade to against counteract the rotation:

The blade can rotate to a angle then fix it by a bolt

I don't know which one of angle is good, so I make 8 hole(rectangle) for try it.
wnqwang February 15, 2013 at 6:41pm

Thanks Ricardo Affonso. I tried "singlecopter" KK and MWC can easy make it. But the structure of "singlecopter" wasn't fit manned. “Convair XFY” and "Lockheed XFV" were "singlecopter" manned aircraft in about 1950, they were given up because safety wasn't good and the man go into and out cockpit was very difficult. I want made a practical manned aircraft not just a unmanned model.
Copter Richie February 15, 2013 at 1:25pm

Very Nice!
Jake Wells February 15, 2013 at 12:15pm

Very cool.
Ricardo Affonso February 15, 2013 at 10:00am

look for "singlecopter", made out of depron. more simple, easy to build and less drag. haven't built anything like that, but yours seems too complex.
Noth666 February 15, 2013 at 9:40am

Awesome!

I am guessing the control authority is a bit of an issue due to the servos having to counteract the rotation of the propeller, or is this taken into account specifically somewhere in the design?

I have been wanting to make a somewhat similar setup for a few years now, but I was going to use counter rotating propellers, one CW, the other CCW and use the differential as yaw basically like quads do. I have seen some coaxial brushless motors out there, but for some reason I can't find them now.

I think the design would be better if you did use 2 counter rotating motors simply because you can keep the package as compact as it is now, increase airflow/power and you get yaw control and stability without having to use the servos to direct the thrust vector to counteract it, thus you would get more power/airflow also at the same time.
LanMark February 15, 2013 at 9:35am

Also it seems like with this design you loose a lot of thrust / performance... do you have the numbers on that? How much thrust does your prop do without the enclosure and how much are you getting with it (subtracting out the weight of the craft)? This uses 4 servos for diverting the thrust?

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