ESC pk yg ini
mtornya pk yg ini 700 kv
Suggested Prop: 10x4.7, 11x3.8 or 11x4.7
Max current draw: 13A (with 11x4.7 prop)
Max thrust: 900g+
Shaft: 4M (perfectly suited to Towerpor/GWS SF Slow Fly props)
Weight: 78g
Diameter: 41mm
cuplikan dr forum sebelah :
i am going to use a dt700 motor so i need to know its maximum amp draw at "WOT" with any given prop from this info i can pick an esc and from that info i can estimate what lipo i need to power it so i go on the website and look for everything i have added ** to, so....
Spec.
**Required Voltage: 11.1v**
Suggested Battery Capacity: 1300mAh +
**Suggested Prop: 10x4.7, 11x3.8 or 11x4.7**
**Max current draw: 13A (with 11x4.7 prop)**
**Max thrust: 900g+**
No Load Current: 1.2A
Shaft: 4M (perfectly suited to Towerpor/GWS SF Slow Fly props)
Weight: 78g
Diameter: 41mm
Overall length: 77mm
Kv: 700rpm/v
this tells us we will draw 13amps with an 11/47 slow fly prop and it will give us 900+ grams of thrust so we now know we need a esc that can handle 15amps continually and 18amps in short bursts which is more than the motor and props max draw we want less amp draw than the motors max so we pick a 10 inch prop instead of 11 inch we want help in slowing down motors on a windy day as it will give us a crisper response to throttle changes so we pick a 10/6 prop (which will give us 700+ grams of thrust and draw 11 to 12amps at WOT) for good solid control in wind but if we fly where there is less wind we can make the craft more stable by picking a lower pitch prop like a 10/45 which will spin faster than a 10/6 prop but due to extra head speed should produce similar amounts of lift as the 10/6
so we have a motor and prop that we will say draws 12amps and gives us 700grams of thrust we also have a 15/18amp esc but how heavy can we make the quad??
700x 4 = 2800 or max thrust from all for motors in a quad
2800/ 2 = 1400 or max weight of quad if we want it to lift off AT ALL! but in an ideal world we want lift off weight to be 1/3 of our total thrust? i.e for best results our lift off weight should be approx 934grams! ready to fly if we want lift off at 50% or better yet we want to be hovering at center stick
so all of a sudden we know everything needs to be under 1400grams at the very limit to fly and just under 1kg to fly well with the above numbers making a quad in that weight class is very easy as my maths has left plenty of overheads in the power train as it stands and all my builds have been under 1.4kg with cameras
(oops RCG information might be very INCORRECT if your reading last years info there as i changed quite a lot of things since then)
so next we overestimate weight of electronics
dt700's 80grams x 4 = 320grams
4x 18a esc = 120grams
FC = 60grams
RX 20grams
servo extension wires = 50grams
power harness wire and plugs 130grams
700grams which leaves 200 to 700grams for lipo frame and camera/fpv equipment NOW WE CAN PICK THE PERFECT LIPO
for tri times by 3 instead of 4
for hex times by 6 instead of 4
for octo times by 8 instead of 4
you get the picture right?
forumnya dimari bOz...
with beep function when voltage is lower than 10.8V
klo dah dtang lsng RAKIT 
