Invention

[BARBERIK]

I would like your opinion.
I was thinking about patenting a small generator to recharge your batterys in flight.It can be mounted on a wing, small ducted fan the size of a dime, or gear driven for helis,cars .:wacky:

[beto9]

There is already an in-flight generator... It mounts behind the propeller... I can't remember the make, maybe Sullivan...
With the new batteries.... why? You will fall asleep before the aircraft needs a recharge...
But is an interesting tought experiment... why not, then?

[BARBERIK]

Thank you Alberto.
Won't waste my time.
After 2 flights with a new battery 4.8v 1500 , digital servos and a 401 gyro my battery is dead.

[jeffrey g]

You should Contact this guy from RunRyder Forum
http://www.runryder.com/member.htm?do=getinfo&userid=4184

here is his gallery:
http://www.runryder.com/helicopter/gallery/4184/


http://www.runryder.com/helicopter/gallery/4184/100_1717.jpg

or read through this
http://www.runryder.com/helicopter/t288750p1/

[beto9]

I still think is a solution in search of a problem... cheaper, faster: change batteries...

[BARBERIK]

Yes I know ,thats why I asked first.
Thanks Jeffery and Alberto

[Eric Marchand]

Two more possible solutions : Go to 6 volts, or switch to LIPO's, 3 cells, and run the current through a voltage regulator. I did this on my combat plane with a 8.4V Lithium Ion battery, running it through a 2 amp ESC I had kicking around. I haven't used it long enough to know what kind of longevity I'll get from the assembly, but it does work.

[jeffrey g]

Generators are bether suited for gasser helis since they use a recoil starter thus freeing up the starter adaptor for the generator....

I think a lipo setup is something to consider espacialy since the lipo's price is droping. and the weight is also down...

Scott gray's (canadian product) SGP regulator and LIPO seams to be a good choice has dual voltage regulator for the gyro see his web site:http://www.scottgrayrc.com/

You should all go see his video's the last one in the list earned him 32 000 $ at the taiwan cup. gives me the chiken skin...

[BARBERIK]

Thanks Eric I do have plenty of 6 volts and will look at some type of regulater. I used 6 volts before, but fryed my rudder digital servo costing me over $100.00 ,so I switch back to 4.8.

AWESOME VIDEOS Jeffery.

[Jeremy Cartlidge]

Eric, you may be interested in this installation on a modified RC helicopter.
It is lighter than batteries for long endurance flights. Batteries are simpler for short duration.

254

[Paul Weijers]

Erik,
I can't see that a 1500 mAh battery is dead after two flights. How long was each flight?
Did you check the battery capacity, i.e. constant discharge with a timer? Have you checked the load current? Could be a short or a servo binding causing excessive current consumption. Charger not working properly?
I know some of these fancy charge/discharge units can be pretty expensive so I designed a simple system to test 4.8/9.6 volt packs for their capacity. Cost about 10 bucks to build.
It will be shown in SERVO magazine in June. Want me to check that pack just drop it off at my place, fully charged of course.
Paul

[BARBERIK]

Hi Paul
I think my problem is with my rudder servo(s9254) it's constantly in demand and draws power as soon a I turn my heli on.I'm using 5 digital servos for my heli and 3 regular ones for my landing gear, even if I disconnect my gear I get the same problem. If I put my battery in my other heli I get about 6 flights,thats without digital servos. Ican get 2 flights of about 15mins.