A20-20L & Thunder Power 11.1 1320

[Bgarrett777]

I want to know how long this setup should run with a 10x4.7 prop, and also will the motor pull more amps then the battery can provide? Thanks

[Bgarrett777]

comon someone reply

[GWRIGHT]

Many people fly this setup . I use 2100's for that motor/prop combo as I don't like pulling that much from the 1320's, and I like longer flight times,..but many people use exactly what you mention and I haven't heard of any problems.

[iva]

Gary, are you using 10X4.7 SF or E prop?

Thanks,

Zoran

[GWRIGHT]

slowfly
Depending on the airframe, I also use this setup with a 10X5E, 9X6E and 8X6 and 9X6 folders.

[iva]

That is good to know. I am currently considering a power plant for my new bipe. I am using 3 Saphion cells (works nice with A20L-22) and was concerened that 10x4.7 SF may be unsafe at such high RPMS. Under load Saphions deliver 9V and with 3 2100 you are closer to 10V, so I guess I should be fine.
Thanks,

Zoran

[GWRIGHT]

actually, with the vampower cells, I'm at 10.7 volts under load, and the load (current) is quite a bit higher due to the voltage. I haven't used a tach to see what the slowfly prop is turning, but i haven't exploded one.

[kyna]

Bgarrett777,

Sorry for the delayed response, I don't typically get the opportunity to answer questions over the weekend.

However, to answer your question. The A20-20L on a 10 X 4.7 with a 3S 1320 will give you an approximate flying time of 7 min. I fly this exact set up on my slow stick, but I never have to use more than 1/2 throttle.

The 1320 pack has a 10C discharge rate I do believe and you may be straining that pack a bit. I would recommend that you go up to a 2100mah pack. Not only will it be easier on the pack you will increase your flight time by several minutes.

Best Regards,

Kyna Veatch
Office Manager
Hacker Brushless USA

[iva]

That's even better.
I should be safe @ 9V.
Thanks,
Zoran

[Bgarrett777]

Well, thanks to every one. . . Heres all my answers in one =) i'm using a 10x4.7E prop and will tach it next time I fly. I just flew about a 12 minute flight a few minutes ago (unbelivibly), which was variable power, most of which was low though. I read the battery pack and it says that it can handle 13C/17 Amp cont. and peak it can do 20C/ 27 Amp. I havent noticed really any strain on the battery but it will cut out about 8 minutes in the flight, but under low power about 10. I dont know how I got the 12 minutes but I just did =) =).

[Bgarrett777]

Heres some random pics of the plane, my backyard (or about 1/2 :cool: ) and me taching the 10x4.7E APC prop on a hacker A20-20L with a Thunder Power 1320 11.1 battery. The battery wasn't at peak so it was cutting out a full throtle. . . . The picture shows 8,000rpm which was at about 3/4 or 7/8 throttle, I can get the plane to fly about 5 feet off the ground at 2,250rpm (really slow):rolleyes: anyways hope this may help someone :confused: