Id like the 3d files please.
Thank you for the param file you had shared last time. It works great with the pixhawk. I had to make very little changes in it to get my 550L dominator flying. I could complete a waypoint mission as well.
But the problem is with the battery. It hardly gives me 4-5 min of mission time. My headspeed is 1400. I want to go on longer missions. I tried to put up 2 x 6s x 5200mah x 25c batteries with Talon 90. But it reduced my flying time to 3 min. I guess the weight of the battery is too high compared to what it can offer.
I had earlier read up Rob Lefebvre's comment that 550 is an inefficient machine unless it is stretched to a 600 or 700. I plan to stretch my 550L dominator to a 700 like you to get 30-40min of flying time. I plan to order the following parts:
Tail boom - 700L size
Torque tube - 700L size (with extra bearing)
Rudder control rod - 700 size
Tail boom supporting braces - 600 size (700 size braces have M4 bolts - not suitable for me)
Tail blades - 105mm
Main blades - align 700mm or 720mm
My questions are:
Can you please help me out with these questions? Thank you for your time.
Rish, Are you sure about your head speed. 1400 with stock 520 or 550 blades is very low. You should be able to get close to 10 minutes with a 5 amp pack and stock blades at 1800 ish headspeed.
David R. Boulanger
Hi David Boulanger,
I had checked up your modification too :) . But I was keen on trying to stretch it to a 700.
I fly with the 550 size blade. I do not practically have any extra payload other than a crossbar and the mounting for the pixhawk. But I suspect that my batteries are not up to it. With new batteries of the same specs I had mentioned in my previous reply, I used to get about 12-15 min on a 550E (flybarred) with 520 size blades at 1400 rpm. But with this dominator (550L) I am not able to replicate that. My battery weighs 800gm.
I programmed Talon 90 for 1400 rpm and measured the rotor HS with the optical rpm measuring tool. http://www.helipal.com/magic-mirror-rotor-head-speed-tachometer.html . I don't have any reason to suspect either of them.
The ambient temperature here is about 40-45 deg centigrade at this time of the year. So, I guess battery performance is effected. Even the motor heats up pretty quick.
Hi Sean, I know this is an old post but any chance you could share your 3D printed files for the pixhawk mount and GPS?
Hey Sean, could you share your 3d printer files for the pixhawk mount and GPS mount with me as well. My email address is firstname.lastname@example.org