something crazy!!

[Cozp83]

hey guys i got some money to burn and an itch to scratch!

how much weight could four of these in quad configuration lift??
http://www.hobbyking.com/hobbyking/store/__25413__Turnigy_RotoMax_150cc_Size_Brushless_Outrunner_Motor.html

more info soon.........  ;D ::)

[nub]

lol it looks like a minigun.

[yama]

thats amazing 

did you see the video of the guy who mounted it to a hang glider with a custom 27" x 10 prop

ground take off';s im still a little secptical  though of the video.....

[ChrisH]

2.5Kg and nearly 10KW EACH!!!

Four of those you could turn a bus into a quad!! 

[Cozp83]

yeah the hand glider was what got me thinking.....

[SimonS]

I';d like an Octo with a set of these:-

http://rctigermotor.com/show.php?contentid=146

[guest325]

You would need money to burn with the battery packs you would need for them!
   

[Cozp83]

im interested in the theory at this stage.

[guest325]

To put things into perspective you would need 4 of these connected series/parallel for 6 mins of full throttle flight.
http://www.hobbyking.com/hobbyking/store/__21374__ZIPPY_Compact_5000mAh_7S_25C_Lipo_Pack.html
That said it would shift one hell of a lot of weight!!!

[SimonS]

Six of those TigerMotors on a Hexa would give you in excess of 100HP!!!!!!!!!!!!!!!!!

[Cozp83]

that doesnt seem to bad, if i wanted this thing to fly for 45 mins how much/many batteries? i may have the funding to find out...........

To put things into perspective you would need 4 of these connected series/parallel for 6 mins of full throttle flight.
http://www.hobbyking.com/hobbyking/store/__21374__ZIPPY_Compact_5000mAh_7S_25C_Lipo_Pack.html
That said it would shift one hell of a lot of weight!!!

[guest325]

The problem is that with the current battery technology after a certain point things become self defeating; weight or volume becomes prohibitive - the only feasible approach is to come up with a configuration you think might work and then look at the theoretical needs to get it into the air but be prepared to compromise on flight times.
I don';t know how scalable these models are but scaling up based on total power should be a good start!

[peter_a]

It would end up like this :-

https://www.youtube.com/watch?v=L75ESD9PBOw

[guest325]

That';s about the strength of it, don';t think I would like to be in the middle of all tthose props whizzing around - one failure and instant sushi     

[Cozp83]

joking aside, i think i may have blagged the money to build something big enough to sit in the middle of!!
if these motors combined are pushing out nearly 40000 watts they';d have a massive load carrying capability so would a small generator be an option??

[Cozp83]

right update on the MEGAQUAD. about to go into a meeting with some investors. its the first step to building this thing! wish me luck peoples!!

[ChrisH]

joking aside, i think i may have blagged the money to build something big enough to sit in the middle of!!
if these motors combined are pushing out nearly 40000 watts they';d have a massive load carrying capability so would a small generator be an option??

A 40 Kw generator is not small! http://www.generatorsales.com/order/Cummins-40-kW-Diesel-Generator.asp?page=6711

3.3L diesel 2000lbs... 

[Cozp83]

I';ll worry about keeping it in the air when I get to that stage;) lol! Pretty sure thats not gonna be an option(generator)   

[Cozp83]

What about a smaller generator that keeps the batteries topped up? Like charge as you use? Or maybe two lots of cells with a relay that switches between the charged an the drained  cells?

[ChrisH]

Even the small 1KW type they use on market stalls are still huge. 

Why switch between packs, surely parallel wiring would save cost/weight? 

[guest325]

Possibly your best bet is a traction battery, these days you can get one that is substantially lighter than they used to be.

[Cozp83]

good call darrell. at this stage id be happy just to get something this big off the ground. 5 mins hovering will do me;)