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Old Oct 11, 2012, 03:33 AM
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Old Oct 11, 2012, 03:53 AM
PJRono is offline
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If those kV ratings are right, it would explain why my ARC 36-55-1.5 1850kV won't get to the 200mph. But it is a solid 175-190 mph performer that is holding up well and doesn't beat up the batteries too badly.
Old Oct 11, 2012, 04:39 AM
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Why the dirt on the wings?
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Quote:
Originally Posted by PJRono View Post
If those kV ratings are right, it would explain why my ARC 36-55-1.5 1850kV won't get to the 200mph. But it is a solid 175-190 mph performer that is holding up well and doesn't beat up the batteries too badly.
Hi PJ,
I did the no loads myself and have the .csv and .FDR files if there is any questions, I can simply send the files.
Old Oct 11, 2012, 04:46 AM
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Why the dirt on the wings?
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Hey sebbe,
Where did you get a picture of my arm from when I was younger and skinny ?
Old Oct 11, 2012, 04:53 AM
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I'm not questioning your numbers, it just didn't make sense that I wasn't getting closer to 200mph with only a 50kV difference. Now that we know that the kV is closer to 2100 it makes more sense.
Old Oct 11, 2012, 06:17 AM
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Originally Posted by moparmyway View Post
Hey sebbe,
Where did you get a picture of my arm from when I was younger and skinny ?
Hehe, Its my arm, over 20inches around, Im at 250 pounds right now, benchpressing 440 pounds... been training since I was 20, Im 43 now...

The only advantage I have in this hobby would be maybee throwing heavy planes better

sebbe
Old Oct 11, 2012, 06:20 AM
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Heck you could probably just throw my Funjet 200 mph! What did I buy all those batteries for?
Old Oct 11, 2012, 07:59 AM
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Why the dirt on the wings?
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Hi PJ,
I was more concerned about some other posters questioning the numbers, also remember, they were diving to get those 200 mph speeds
Old Oct 11, 2012, 08:12 AM
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Why the dirt on the wings?
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Originally Posted by moparmyway View Post
- measurements between phases and each motor differ
-#1 has resistances of 0.0116 / 0.0126 / 0.0134 (2 poles) (averaged to 0.0125)
-#2 has resistances of 0.0128 / 0.0138 / 0.0132 (2 poles) (averaged to 0.0133)

#1 weighs in at 8.875oz
#2 weighs in at 8.835oz

- stated resistance of 0.011
Quote:
Originally Posted by moparmyway View Post
No bullets:
#1 motor ......... 8.755oz ..... 2085kv actual ..... 0.0122 milli-ohms resistance (2 poles)
#2 motor ......... 8.720oz ..... 2100kv actual ..... 0.0121 milli-ohms resistance (2 poles)


Dudes,
The differing resistances between phases with HC 3.5mm bullets attached would have meant disaster sooner rather than later for the #2 motor.

The higher resistances in those bullet connector solder joints would have played havoc with the ESC trying to get smoothe controll on the RPM's.. For sure, the 2 connections that were higher resistance (due to the soldered bullets) would have resulted in more heat at the connection and probably a burned lead in flight at higher power levels.

I think it was sandman (not sure, so correct me if I am wrong) that stated he oils his bearings after CA'ing his magnets on his HC motors, right out of the box .............. I hope everyone adds the important step of re-soldering their bullets if they plan on using the stock ones !!!!!!!!!!!!
Old Oct 11, 2012, 12:30 PM
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I ALWAYS remove those bullets on every motor, then resolder direct to the esc..

Mopar is right, its very important resistance is as close as it can get.....
Old Oct 11, 2012, 07:21 PM
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Why the dirt on the wings?
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Originally Posted by GryphonRCU View Post
If I remember right, Moparmyway has run Castle ICE HV ESC on 3S without any issues. Hopefully he will chime in.


Gryphon
I missed this post ............... sorry Bro !!!

I have ran 3 cells before, maybe 5 or 6 flights, but with very low power (about 75% of the ESC rating) ................... not for fear of anything, but just to fly a lighter setup with more flight time on a lower amp draw
Old Oct 13, 2012, 12:37 PM
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Quote:
Originally Posted by moparmyway View Post
Things just didnt seem right, so I took off the heatshrink and bullets, then re-measured the resistances ............... results speak volumes for HC soldering QC ........... I humbly suggest everyone who gets a Turnigy motor re-heat their bullets and make sure of good soldered joints

No bullets:
#1 motor ......... 8.755oz ..... 2085kv actual ..... 0.0122 milli-ohms resistance (2 poles)
#2 motor ......... 8.720oz ..... 2100kv actual ..... 0.0121 milli-ohms resistance (2 poles)

No load kv was done on ICE and Eagletree at the same time, if anyone wants the file.
Had a skiff of light snow Wednesday,it's melted and in the teens.....nice cool mountain air!!
Old Oct 13, 2012, 12:58 PM
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Why the dirt on the wings?
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Got one heading your way Mon or Tues.
You should have it for the weekend !

Do you have a good 6 cell (like 2650 or 2700 ?)
Old Oct 13, 2012, 05:18 PM
FLAME747 is offline
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Static Model Collector LOL
Lost another FJ today, due to bad hand launch.

Almost made it, but tail hit the ground at full power
Motor mount tore off

FCA

Should have another one up soon
Maybe I'll put up my old heavy, use it to practice hand launching
Old Oct 14, 2012, 12:44 AM
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Hs 85's ? Is the servos that are being used?


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