Hobby King Skyfun - speed thread - Page 8

Dr Niceguy · Mar 10, 2011, 06:28 PM

Ahh, that's clear now thanks for that Ian.
Unfortunatley that's a little beyond my hobby skills lol, I think a washer in the bottom mount would lift it enough, I just wondered if there were other ways (like grinding a little off the bottom plate).

Thanks though

NinetySix · Mar 10, 2011, 06:42 PM

Grinding would be safer, as using washers will change your thrust angle which might cause some strange power-on handling

Mr RC · Mar 11, 2011, 10:37 PM

All complete,
It's running the following (before I start chopping it up and put the Turnigy 3648, 5cell):
Typhoon 2W 4.75 x 4.75
Turnigy 85A BEC
Flightmax 4 cell 2200 40c

saufett · Mar 12, 2011, 11:53 PM

I was thinking about ordering batterys for my Skyfun (Im buying the plane a little later in the spring). And was woundering if this is a good battery to start with for a newbie like me, and will it fit in the cokpit of the Skyfun?
Motor im going to use: Turnigy2836 brushless Outrunner 2350kv
And Esc: Turningy Sentry 60amp Speed Controller

jstoll · Mar 13, 2011, 01:15 AM

no the 20C rating is really poor and you will puff the battery trying to make good power with it get something with a higher C rating
take care
JAK

saufett · Mar 13, 2011, 03:15 AM

Quote:

Originally Posted by jstoll

no the 20C rating is really poor and you will puff the battery trying to make good power with it get something with a higher C rating
take care
JAK

Ok, but what is considered the minimun C rating for: 3s and 4s batteries then?
Also the dimensions in the battery picture in prev post....will it fit sizewise?

jstoll · Mar 13, 2011, 03:31 AM

I dont know about the skyfun but Id go with a minimum 30C bat read up about batteries and what C rating is :-) its all here :-)
you just want to make sure you can pull enough amps to have fun with your skyfun
take care
JAK

saufett · Mar 13, 2011, 10:04 AM

It would be nice if you 4S users could post what C rating you are using

NinetySix · Mar 13, 2011, 05:37 PM

I used 40c 1800mah 4s, but 2200 would be better

Heck 45/90c nanotech would be awesome

you can never have too much C rating, and they are all pretty cheap

inline300 · Mar 13, 2011, 06:08 PM

sharp paint job, even if it is green and yellow

one thing that caught my eye, If that were mine, Id stick something in front of the battery to act as a stop.

if for some reason, failed esc or servos or whathave you occurs, that battery will destroy everything in its path, should the a collision cause everything to be forced forward. trust me. lol

Esprit 88 · Mar 15, 2011, 06:18 PM

[QUOTE=Mr RC;17657232]All complete,
It's running the following (before I start chopping it up and put the Turnigy 3648, 5cell):
Typhoon 2W 4.75 x 4.75
Turnigy 85A BEC
Flightmax 4 cell 2200 40c

Do you know how many amps this combination draws?

Thanks

NinetySix · Mar 15, 2011, 06:26 PM

Made some changes to my motor mount so I can run the 36mm outrunner as an 'inboard' setup, which also allows the use of an inrunner later on. I used 50x50x3mm right angle aluminum screwed to 6mm ply with the carbon spars sandwiched between. Also cut the canopy down even more, glued it in and added a 3mm coro canopy/hatch and added a set of wipers over the finger holes. Makes it tricky to balance

auw around 1280g, don't need ballast in the nose with the inboard motor.

Pix:

https://picasaweb.google.com/lh/phot...eat=directlink
https://picasaweb.google.com/lh/phot...eat=directlink
https://picasaweb.google.com/lh/phot...eat=directlink
https://picasaweb.google.com/lh/phot...eat=directlink

There ain't nothing pretty about it

WAM74 · Mar 15, 2011, 07:23 PM

Recommendations for an inexpensive HK motor that will work with the remaining RTF electronics? I would think the 25A ESC could run a bigger motor than the RTF, but I haven't found the RTF specs so I don't really know what I have.

Not looking for 100mph+ here...just a modest but worthwhile upgrade over stock.

NinetySix · Mar 15, 2011, 07:33 PM

You can't really go past a suppo style 2212 2200kv (aka 2826) but hk don't actually sell them or anything like it unfortunately. About 50g, pulls about 22-25a on 3s with 6x4e and good efficiency. Should take the skyfun to what it should be stock, which would be close to a stock stryker-c. $10 delivered from rctimer

WAM74 · Mar 15, 2011, 07:54 PM

Thanx. So that would be this one?
http://www.rctimer.com/index.php?gOo...7&productname=

I note it calls for a 30A ESC. Is the SkyFun 25A up to the task?

All I've found on the original motor is it's 1800kv. I assume since it uses an 11V battery and 25A ESC, it might be about 200W. But from the complaints of lackluster performance, I wonder if it's really that high?

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Mar 10, 2011, 06:28 PM	#106
Dr Niceguy Registered User Joined Apr 2005 206 Posts	Ahh, that's clear now thanks for that Ian. Unfortunatley that's a little beyond my hobby skills lol, I think a washer in the bottom mount would lift it enough, I just wondered if there were other ways (like grinding a little off the bottom plate). Thanks though

Mar 10, 2011, 06:42 PM	#107
NinetySix Registered User Melbourne, Australia Joined Mar 2009 368 Posts	Grinding would be safer, as using washers will change your thrust angle which might cause some strange power-on handling

Mar 11, 2011, 10:37 PM	#108
Mr RC Registered User Sydney Joined Feb 2011 13 Posts	All complete, It's running the following (before I start chopping it up and put the Turnigy 3648, 5cell): Typhoon 2W 4.75 x 4.75 Turnigy 85A BEC Flightmax 4 cell 2200 40c

Mar 12, 2011, 11:53 PM	#109
saufett Registered User Joined Feb 2011 29 Posts	I was thinking about ordering batterys for my Skyfun (Im buying the plane a little later in the spring). And was woundering if this is a good battery to start with for a newbie like me, and will it fit in the cokpit of the Skyfun? Motor im going to use: Turnigy2836 brushless Outrunner 2350kv And Esc: Turningy Sentry 60amp Speed Controller

Mar 13, 2011, 01:15 AM	#110
jstoll cant leave things stock USA, CA, Santa Cruz Joined Feb 2007 1,440 Posts	no the 20C rating is really poor and you will puff the battery trying to make good power with it get something with a higher C rating take care JAK

Mar 13, 2011, 03:31 AM	#112
jstoll cant leave things stock USA, CA, Santa Cruz Joined Feb 2007 1,440 Posts	I dont know about the skyfun but Id go with a minimum 30C bat read up about batteries and what C rating is :-) its all here :-) you just want to make sure you can pull enough amps to have fun with your skyfun take care JAK

Mar 13, 2011, 10:04 AM	#113
saufett Registered User Joined Feb 2011 29 Posts	It would be nice if you 4S users could post what C rating you are using

Mar 13, 2011, 05:37 PM	#114
NinetySix Registered User Melbourne, Australia Joined Mar 2009 368 Posts	I used 40c 1800mah 4s, but 2200 would be better Heck 45/90c nanotech would be awesome you can never have too much C rating, and they are all pretty cheap

Mar 13, 2011, 06:08 PM	#115
inline300 Registered User Joined Jan 2009 1,576 Posts	sharp paint job, even if it is green and yellow one thing that caught my eye, If that were mine, Id stick something in front of the battery to act as a stop. if for some reason, failed esc or servos or whathave you occurs, that battery will destroy everything in its path, should the a collision cause everything to be forced forward. trust me. lol

Mar 15, 2011, 06:18 PM	#116
Esprit 88 Per Ardua ad Astra London U.K. Joined Jan 2005 359 Posts	[QUOTE=Mr RC;17657232]All complete, It's running the following (before I start chopping it up and put the Turnigy 3648, 5cell): Typhoon 2W 4.75 x 4.75 Turnigy 85A BEC Flightmax 4 cell 2200 40c Do you know how many amps this combination draws? Thanks

Mar 15, 2011, 06:26 PM	#117
NinetySix Registered User Melbourne, Australia Joined Mar 2009 368 Posts	Made some changes to my motor mount so I can run the 36mm outrunner as an 'inboard' setup, which also allows the use of an inrunner later on. I used 50x50x3mm right angle aluminum screwed to 6mm ply with the carbon spars sandwiched between. Also cut the canopy down even more, glued it in and added a 3mm coro canopy/hatch and added a set of wipers over the finger holes. Makes it tricky to balance auw around 1280g, don't need ballast in the nose with the inboard motor. Pix: https://picasaweb.google.com/lh/phot...eat=directlink https://picasaweb.google.com/lh/phot...eat=directlink https://picasaweb.google.com/lh/phot...eat=directlink https://picasaweb.google.com/lh/phot...eat=directlink There ain't nothing pretty about it

Mar 15, 2011, 07:23 PM	#118
WAM74 Registered User Ridgecrest Calif Joined Nov 2010 453 Posts	Recommendations for an inexpensive HK motor that will work with the remaining RTF electronics? I would think the 25A ESC could run a bigger motor than the RTF, but I haven't found the RTF specs so I don't really know what I have. Not looking for 100mph+ here...just a modest but worthwhile upgrade over stock.

Mar 15, 2011, 07:33 PM	#119
NinetySix Registered User Melbourne, Australia Joined Mar 2009 368 Posts	You can't really go past a suppo style 2212 2200kv (aka 2826) but hk don't actually sell them or anything like it unfortunately. About 50g, pulls about 22-25a on 3s with 6x4e and good efficiency. Should take the skyfun to what it should be stock, which would be close to a stock stryker-c. $10 delivered from rctimer

Mar 15, 2011, 07:54 PM	#120
WAM74 Registered User Ridgecrest Calif Joined Nov 2010 453 Posts	Thanx. So that would be this one? http://www.rctimer.com/index.php?gOo...7&productname= I note it calls for a 30A ESC. Is the SkyFun 25A up to the task? All I've found on the original motor is it's 1800kv. I assume since it uses an 11V battery and 25A ESC, it might be about 200W. But from the complaints of lackluster performance, I wonder if it's really that high?