I just need a amp estimation more or less from you oaks experience... I have a 860W Turnigy with 60A ESC... which prop size would you recommend and what type of Amps should I expect to be drawn from that prop? the reason being I need to select a battery that will at least give me that size burst current...

If you're asking about the Turnigy 4260-600 then hobbycity suggests

Recommended props:
11x5.5 APC-E (6 cells: 41A, 870W, 2900g, 60mph, 11600rpm)
12x6 APC-E (6 cells: 54A, 1130W, 3500g, 60mph, 10800rpm)

Which sounds about right. This means at 20C max your looking for battery that is a minimum of 2050 or 2700 mah using the data above.

(41 amp * 1000 ) = 41000 mah / 20c = 2050
(54 amp * 1000 ) = 54000 mah / 20c = 2700

A 3000+ mah cell would minimize the chance of damage.

If you look at the product page for that specific Turnigy motor on the Hobby City website, there will probably be a lot of comments under the "User Reviews" section, where people describe in detail what plane/motor/esc/prop/battery combo they have used it in, and how many amps it pulled. There is usually a lot of good information in those posts.

Good luck

BalsaBrkr

thats awesome info and exactly what I wanted... thanks

you wouldn't happen to know the flying times also? say maybe full throttle and half throttle times when using the 11x5.5E prop? with a min 2050 20C ...

Using the 41 amp version

Then full throttle will draw 41000 mah an hour

(41 amp * 1000 ) = 41000 mah / 20c = 2050

So a 2050 pack would last at 85% capacity utilization

(2050 * .85) / 41000 hours

or .0425 hours * 60 minutes = 2.55 minutes

and your battery will hate you...

Under normal sport flying I would anticipate a time of around 7 minutes would be safe

thanks again... help appreciated...

ROTFL!

Very true..

I would call 7 minutes a VERY VERY optimistic figure for that battery.

He wants something larger at that large of a draw.

I would minimally spec two batteries in Parallel if he wants to save money.

It depends.

I fly a 500 watt 3D Hobbyshop Extra SHP on 2100 3s lipos and get 7 minutes with no problem.

At WOT it draws 43 amps having a similar profile to his setup.

Power draw is not linear with throttle, so 1/2 throttle doesn't mean 21 amps.

WOT provides extreme vertical and is seldom used for more than 10 - 15 second bursts.

Even 10-15 second bursts sounds like a lot of "time" spent going vertical.. unless actually hovering which uses less than acceleration while going vertical. And that's (gravity) what chews up available battery power.

You are correct, probably more like 4 - 7 seconds... Hovering is more like 2/3rds throttle.

7 seconds would be from near ground to way up for something like an extended flat spin.