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Lee2782 · 12-28-2014, 07:12 PM

Hi Guys,

iv been flying my 700DFC with 750MX 530kv for 2 years now and love it! my main flying headspeed is 2000

I really like the efficiency of the 750mx and that's why I have not upgraded to 800-850mx (even though the 800-850 have a lot more power) but im wondering would a 750MX 450Kv with 110/13 gearing be more efficient with my head speed of 2000?

goodhunting · 12-29-2014, 02:10 AM

Do the math....
Desired RPM at full throttle = (Kv of motor x Volts of the battery x 0.9 ( motor efficiency)) / (main gear tooth count / pinion tooth count)

That will give you the max RPM at the end of the flight. Note that Castle esc's do not like to run below 85% as they tend to get hit and cause problems....

Gh

Sent from my iPhone using Tapatalk

Excalibur3 · 12-29-2014, 08:43 PM

All jokes aside brother give the 800mx a go. You won't be disappointed at all. No way I'd buy another 750mx if I was you. Just upgrade to the next level

Trex700ProDFCHV,Goblin 770,Goblin 570, 14SGH

Dawiev · 12-29-2014, 09:01 PM

Cannot get the formula to work ?

12-28-2014, 07:12 PM	#1 (permalink)
Lee2782 Registered Users Join Date: Apr 2011	750MX 530kv Vs 750MX 450kv Hi Guys, iv been flying my 700DFC with 750MX 530kv for 2 years now and love it! my main flying headspeed is 2000 I really like the efficiency of the 750mx and that's why I have not upgraded to 800-850mx (even though the 800-850 have a lot more power) but im wondering would a 750MX 450Kv with 110/13 gearing be more efficient with my head speed of 2000? __________________ Revolectrix Ambassador Revolectrix.com 10% Discount All Products Code LEESS17

12-29-2014, 08:43 PM	#3 (permalink)
Excalibur3 Registered Users Join Date: Jul 2012	All jokes aside brother give the 800mx a go. You won't be disappointed at all. No way I'd buy another 750mx if I was you. Just upgrade to the next level Trex700ProDFCHV,Goblin 770,Goblin 570, 14SGH __________________ TREX 700 Pro, TREX 700LTop, GauiX3, Futaba 14SGH

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12-29-2014, 02:10 AM	#2 (permalink)
goodhunting Registered Users Join Date: May 2011	Do the math.... Desired RPM at full throttle = (Kv of motor x Volts of the battery x 0.9 ( motor efficiency)) / (main gear tooth count / pinion tooth count) That will give you the max RPM at the end of the flight. Note that Castle esc's do not like to run below 85% as they tend to get hit and cause problems.... Gh Sent from my iPhone using Tapatalk

12-29-2014, 09:01 PM	#4 (permalink)
Dawiev Registered Users Join Date: Jul 2013 Location: Middle East	Cannot get the formula to work ?

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