hello there, I am thinking about getting a rekon 5 lr for long range, and I was wondering if anybody had one, to know if it would fly longer with a 200g 3000mah battery, or with a 4850mah 300g battery, both 4s (even if the drone is for 6s, dave_c recommends 4s for long range), and they both have about the same mah/weight ratio too
I was also wondering, if I put bi bladed props on it, how big would the boost in battery life be ?
thanks in advance
#rekon 5 lr battery and props
warped hemlock
winter canopy
hello there, I am thinking about getting a rekon 5 lr for long range, and I was...
"It Depends" .....
Is probably not the answer you want to hear, but it kinda does.
Bigger batteries take more power to lift, so going to the 300 gram battery may not gain as much as you hope, but should go further. Also, a 4850mah 21700 cell will likely be a low C rated cell, which may mean it's capacity under load is a lot lower. The more of a percentage of the C rating you use up, the less actual capacity a battery has. So if those are rated for 12 amps, and you are flying at 10 amps, you might only get 2500mah out of them before the voltage has sagged below cutoff.
There are some great 4500mah cells out there that can do 45 amps, however. Molicel P45A may actually go farther, depending on how smooth you fly and how much current you draw.
As for props, 2 bladed props are about 15% more efficient in theory than a 3 bladed prop. However, some Gemfan 3 bladed props, have been tested to be nearly the same efficiency as the 2 bladed props, and HQprops are very close. There is also sometimes a weird transition in efficiency. In most cases, low pitch props are the most efficient, but at low throttle, like you might be if you were trying to maximize air time, high pitch props can be more efficient.
Also, Flying Long range is a skill. If you stick an LR battery on a quad, and go try to fly it like you would with a lipo battery, you'll set it on fire in about 10 seconds. A normal 5" quad will pull 80 amps easily, and can pull 150 amps in extreme maneuvers. Many LR batteries can handle 20 amps or less. Try to pull more amps, and they will be damaged, possibly melting down, catching fire, or outright exploding.
Just be mindful that you can't use the throttle much. big changes in throttle position mean big amp spikes, as well as wasting huge amounts of power. Flying LR is all about keeping your thumb out of the throttle as much as possible.