RunRyder RC
WATCH
 3 pages [ <<    <     1      2     ( 3 )    >    >> ] 7224 views POST REPLY
HomeScale✈️AircraftScale HeliRoban Scale Helicopters › Just Picked up a Roban EC-135
05-18-2017 04:17 PM  31 months ago
TailKiller

rrApprentice

Panama City, FL

MyPosts All Forum Topic
I'm in Florida also. Andy01 is correct about the ESC not liking 78%. With the 13.8:1 gear ratio at 1350 rpm and good 30c 12s packs, the ESC will actually be running in the low to mid 60% an the esc will get around 180 degrees or higher for a 5 minute flight. The ESC is rated to handle the temp but I personally don't care for it.
There is a cheaper way without getting a lower kv motor. The goblin motor pinions work just fine. Get a 20t pinion to replace the 22t pinion that came with the kit. Then you will have a 15.2:1 ratio. I use a 520 kv motor and fly between 1300 an 1350 rpm on a 2 blade 17 pound Roban AS350. My esc temps are now around 145 on a 7 minute flight and the esc is running in the mid 70's to mid 80's %. Unfortunately the Talon esc does not have a data logger so you can't see what the esc is actually doing during a flight.
Dennis
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
05-18-2017 05:23 PM  31 months ago
donnie170

rrApprentice

troy, AL.

MyPosts All Forum Topic
I have the PHI EC and have been working on the heat issue also. I am using a 450kv motor on 12s with a castle hv120 in governor mode 1200 rpm with the stock gearing this put it at 92% using the castle programing. the esc after 6 minutes was at 195F and had not peaked. The first thing I did to try to cool it down was to install a cooling fan on the ESC, that helped a lot it looks like the temp peaked in the mid 165 range. When I down loaded the castle log the actual percentage out on the ESC was only 80 to 85 percent not close to the 92% the castle programing said it would be. After talking to Castle support I found out the number in the programing is not exact and its better to us the information in the data log. So I changed the pinion to get a 15.21 gear ratio and still used 1200 rpm. Using these numbers it put the programing about 101% that's in the red but according to tech support that is not a problem it will still govern. My next flight started at 95 degrees outside temp and after 6 minutes peaked at 145. And on the data log it was using 90 to 95 percent power out. I need to put a few more flight on it to prove it out but I think this setup will work. I hope this helps

Donnie
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
05-18-2017 05:41 PM  31 months ago
swampd20155

rrNovice

Gainesville, FL

MyPosts All Forum Topic
Thanks for the responses, guys! And sorry to hijack the thread, but hopefully this info is good for the OP as well!

I haven't yet purchased batteries, which is why I asked. Sounds like I can use 10S without issue (2 x 5S, obviously) and the ESC should be happier. I already have the cooling fan, so that's a plus as well.

I think I'll start with the 10S system with the stock pinion and see what the temps look like, along with performance. Once I get the batts I should be ready for a test hop.

Marsh
Beating the air into submission...
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
10-28-2018 10:18 AM  13 months ago
Tman49

rrNovice

Columbus, OH

MyPosts All Forum Topic
Jwest, Did you finish the build?Everything is temporary, good or bad.
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
10-28-2018 07:06 PM  13 months ago
pctomlin

rrVeteran

Texas

MyPosts All Forum Topic
One thing to remember when using Castle governor, it bases its throttle output percentage on a 3.7V per cell calculation. If you want a truer number, in the battery information select "Other" for the battery type and input 3.8V per cell.
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
WATCH
 3 pages [ <<    <     1      2     ( 3 )    >    >> ] 7224 views POST REPLY
HomeScale✈️AircraftScale HeliRoban Scale Helicopters › Just Picked up a Roban EC-135
 Print TOPIC  Make Suggestion 

 16  Topic Subscribe

Friday, December 6 - 10:36 pm - Copyright © 2000-2019 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online