Help with motor/prop/esc combo

[trexcustomz]

First off I am new to this forum. This is actually the first MR forum That I am a member of. I wasnt planning on getting this in depth into this hobby but I have found peace and fun in it so I am hooked now.

To start with I am currently flying the following:
DJI F550
Naza M V2 w/osd min/ BTU
DJI E300 propulsion system
3s 5000 Mah 25c
3S 5000 Mah 35c
4s 5000 Mah 40c
(i fly with one or the other batteries)
I have the typical tall H style landing gear
tarot 2D gimbal
gopro hero3 silver addition
total weight with 4s battery is right at 2500 grams

I use a Hitec aurora 9 transmitter and Hitec optima 9 receiver

The MR flies well (as it is overweight) for the current motor/prop/esc setup. I get about 4-5 minutes of flight time with the 3s batteries and about 7-8 minutes of flight time with the 4s. times depend on wind and how aggressive I am with it.
I mainly do aerial filming of drag racing events/mud races as well as corporate construction projects. so flight time is pretty critical for me.

My question is I am sure that differant motors and props will help with flight times as well as stability and other vital procedures needed.
What would be a good or the best combination of motors/esc/props needed. would like to go 2 battery setup if possible but thats alot of weight and i would assume that i would be better off changing platforms at that time.
any help would great on this topic and I thank you all for the help.

 

[gtranquilla]

I went down a similar path when upgrading my old F550 and spent a lot of time and money to get what was needed to regain good airtime and flight control.
Basically the issue is about a full on fight with the law of gravity which is almost an exponential curve.
Likewise the cost increase to regain the needed airtime also tends to follow the same exponential curve = BIG $$$$$!

1) Invest some time and energy into eCalc for Multirotors to gain valuable insight in to the consequences of under or oversized motors and/or props etc.
2) Since the prop sizing is restricted by the motor arm length, you might want to consider longer motor arms or a cheap upgrade kit, e.g.,
http://www.rctimer.com/product_809.html

or check out MRF for the longer aluminum arms developed specifically for the F550.

 

[trexcustomz]

I went down a similar path when upgrading my old F550 and spent a lot of time and money to get what was needed to regain good airtime and flight control.
Basically the issue is about a full on fight with the law of gravity which is almost an exponential curve.
Likewise the cost increase to regain the needed airtime also tends to follow the same exponential curve = BIG $$$$$!

1) Invest some time and energy into eCalc for Multirotors to gain valuable insight in to the consequences of under or oversized motors and/or props etc.
2) Since the prop sizing is restricted by the motor arm length, you might want to consider longer motor arms or a cheap upgrade kit, e.g.,
http://www.rctimer.com/product_809.html

or check out MRF for the longer aluminum arms developed specifically for the F550.

First I would like to say thank you for your reply!
what was your final conclusion on your endeavor with the F550? I definitly do not want to spend $$$$ just to build something in the end will not ever meet my expectations. I have expiermented with the eCalc website but I am not up to par with all the motor spec out there. I am good at building electronics and understanding how one piece effects the other. But I am not good at the down and dirty book related aspect of it. (terminologies, accronyms, or pin point schematics on this stuff) I am very much a visual learner.

I do know I have seen many ppl running this platform that have everything I have and possible a little more and they are doing quite well with it. and the only real differance I have seen is they are running differant motors and props. which i will assume my decision to go with the E300 propulsion system was a bad idea from the amount of money I have spent in trying to use props that others with the red top motors were using. which really boggles me as the two motors seem to be the same but apparently are not.
As you can tell this is very frustrating to say the least.

any suggestions!!!!?

 

[gtranquilla]

FYI - This was my RCT800 which has 800 mm motor arms versus the DJI550 which had only 550 mm motor arms. That enabled use of larger props, i.e., 15" 5.5 pitch, with higher torque motors.
I used RCTimer 15 x 5.5 carbon fiber props, HobbyKing 35 amp Opt Turnigy Multistar ESCs and 420 kv Multistar motors for a smooth flying machine that could carry the Hero GoPro3 Black camera on a BGC system for 23+ minutes.

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