Thread Tools
Feb 21, 2013, 11:03 PM
Registered User
anlucas's Avatar
Quote:
Originally Posted by fooyukvoon
Do u hv a picture of this hole saw? A bit difficult explaining what one wants over here.

Thanks.
This is the one myself and some others are referring to...

http://richontools.com/index.php?mai...d660d25c1b7e30
Sign up now
to remove ads between posts
Feb 21, 2013, 11:18 PM
Registered User
1Eye's Avatar
Quote:
Originally Posted by PeterVRC
I bought a "40mm diamond tipped hole saw".... for $4 from eBay. (there is pretty well only one place selling them)
You can then just "drill" out the motor hole to be larger.
I also bought a 41mm one, but did not need to use that.
Quote:
Originally Posted by Figure9
This has been suggested before I think
Quote:
Originally Posted by PeterVRC
When boring out a hole, if you don't use something exactly the required diameter.... and preferably opening it out only bit by bit (in steps of diameter size).... then the error ability is large.
A flapper brush like that.... extremely error prone! In guidance direction and diameter.

But I expect it would still make something that worked. (even if wonky... as long as it has the motor clearance to allow the motor mount/face to assure the motor ends up straight.)

I wasn't really sure about the holesaw idea, but when I got them it showed they are perfect for that task.... because they have a slightly tapered leading edge, thus that goes into the stock hole and automatically leads it accurately down the 'path' it needs to go, and the diamond surface on that taper eats out the housing to then be the outer holesaw diameter (40mm... or a 41mm one etc). Plus the holesaw is 30mm long, or whatever, so very quickly it all forms a guided 'tube in a tube' which also assures perfect accuracy is maintained all the way to the end.
So it was ideal to use those holesaws.... if you want to end up with a perfectly machined and aligned CS12 motor tube.
Thanks Guys for your sugestions, i'm stil nervous about doing it though! ah well, "in for a penny in for a pound"
Sorry! and anlucas
Feb 21, 2013, 11:43 PM
The Need4Speed
fooyukvoon's Avatar
Thanks, now I can just show them a picture of it without performing weird contortions with my fingers. .
Feb 23, 2013, 08:57 PM
Keith Thomas
keithtsr's Avatar
I finally got to test fly my CS 90 that I got from Air-Jon. I flew it in a HK Mig on 7s.

She was smoking, probably as fast, or close to my Habu 32 running 7s but sounds a lot better!

Nice work on the fan Air-Jon.
Feb 23, 2013, 09:01 PM
Registered User
DamonH's Avatar
Quote:
Originally Posted by keithtsr
I finally got to test fly my CS 90 that I got from Air-Jon. I flew it in a HK Mig on 7s.

She was smoking, probably as fast, or close to my Habu 32 running 7s but sounds a lot better!

Nice work on the fan Air-Jon.
Congrats Keith...glad to hear it went well!
Feb 23, 2013, 10:31 PM
Keith Thomas
keithtsr's Avatar
Thanks Damon. We need to go to the airport to fly Jets. Our field sucks, it's so ruff, it ripped the gear out on take off. I yanked it off the ground anyway.

I was just amazed at the little cheap HK Mig flew. The CS fan is not bad at all, I do have the one piece unit that I'm going to give a shot.
Feb 23, 2013, 10:47 PM
Registered User
DamonH's Avatar
Quote:
Originally Posted by keithtsr
Thanks Damon. We need to go to the airport to fly Jets. Our field sucks, it's so ruff, it ripped the gear out on take off. I yanked it off the ground anyway.

I was just amazed at the little cheap HK Mig flew. The CS fan is not bad at all, I do have the one piece unit that I'm going to give a shot.
Ouch...that sucks. We're you able to land it safely?
Feb 23, 2013, 11:26 PM
Keith Thomas
keithtsr's Avatar
Quote:
Originally Posted by DamonH
Ouch...that sucks. We're you able to land it safely?
Yes and no. I pulled the gear up or so I thought a flew on. I knew I was going to have to bring it on it's belly. For the most part it went well, ended up taking most of the day to fix it!

Good to go now.
Feb 24, 2013, 11:44 AM
Fly now crash later
davecrash's Avatar
Quote:
Originally Posted by keithtsr
I finally got to test fly my CS 90 that I got from Air-Jon. I flew it in a HK Mig on 7s.

She was smoking, probably as fast, or close to my Habu 32 running 7s but sounds a lot better!

Nice work on the fan Air-Jon.
Quote:
Originally Posted by keithtsr
Thanks Damon. We need to go to the airport to fly Jets. Our field sucks, it's so ruff, it ripped the gear out on take off. I yanked it off the ground anyway.

I was just amazed at the little cheap HK Mig flew. The CS fan is not bad at all, I do have the one piece unit that I'm going to give a shot.
Still flying mine with the CS with a warhead 1350 on 7S. Same problems with grass here, I get some times at nice fields.
Feb 24, 2013, 11:55 AM
Keith Thomas
keithtsr's Avatar
I just flew the little Mig again this morning. It is probably the most over looked little jet I've seen. It is a little on the small side so you have to plan out where stuff is going to go.

The CS fan really pushes it along very nicely.
Feb 26, 2013, 09:30 AM
Registered User
Quote:
Originally Posted by erh7771
X-flight does have some spare blades for the fan 22usd



This motor looks promising, good cooling and 8mm shaft...I don't think it'll burn up or give you trouble...just no one has but it to thrust test yet...should be around 9-10lbs at 3000k watts.

Fan sounds really good in the FF model in the YT vids I've seen.



It's proven..



Please show pics....I have a FF Hawk in the garage screaming to be built and repainted T-45 colors
Sorry mate, this thread moves so fast I missed your response, so here are some pictures of where I'm at, but I have just sorted out my most recent delay of how to do the elevators. will be posting that soon. any more info is in this thread:

https://www.rcgroups.com/forums/show...t=mk127&page=5

Looking at the data people are posting and the fact that I am running a 100A ESC on this one I am starting to lean towards a 1200kv motor for this setup and give myself some amp's headroom. the DrMad 1200kv looks good other than the 5mm shaft, but has anyone posted some data around this motor/fan combo?

Thanks

Dave

P.S. I have ordered the replacement fanblade set, even though it is only $8 more for the whole fan unit!
Feb 26, 2013, 04:25 PM
The best in EDF since 2005
Extreme_RC's Avatar
Why dont you just get the HET 8mm shaft 1125Kv while they are on special...
http://www.extremerc.com.au/estore/i...oducts_id=1154
Feb 26, 2013, 09:31 PM
Registered User
Quote:
Originally Posted by Extreme_RC
Why dont you just get the HET 8mm shaft 1125Kv while they are on special...
http://www.extremerc.com.au/estore/i...oducts_id=1154
ok ok, done!

I haven't seen any figures for this setup or have I missed something?

Thanks

dave
Feb 27, 2013, 06:21 AM
The best in EDF since 2005
Extreme_RC's Avatar
I dont think there has been much testing in the 1100-1200Kv range, but the 1125 is a better choice than the 1200 for this sort of setup, in the stumax the 1125 was also the better choice, mild 8s around 75 amps, very strong 10s.

If you want a hotter 8s setup then I have the 1400Kv on special also, I tested that at 109 amps for 4.3kg thrust. The 1500Kv on 6s is also nice, around 3.2-3.3kg thrust for only 87A on 6s5000 packs.
Feb 27, 2013, 07:05 AM
Registered User
Mark, did you have any CS12 results for the 1125kv on 8S? Or even something that could give at least a reference to that?

Or maybe someone else has run one?

To me, the 1125kv on 8S is a dead match for 1500kv on 6S, in RPM mathematically. But would it really be is result? I would think so.... but......
Both 33,300 RPM at the cell count volts... not just close, but exactly. So if the 1500kv 6s is 1900W (87A) area, then the 1125kv 8S should be 65A area doing that.
????


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Sold Zurich sun blocking sun-glasses $40 shipped MJB9 Aircraft - General - Miscellaneous (FS/W) 7 Oct 06, 2011 10:47 PM
Sold Zurich sun blocking sun-glasses $50 shipped MJB9 Aircraft - General - Miscellaneous (FS/W) 0 Oct 05, 2011 09:14 PM
Sold Change Sun electric retracts Flip Flop Aircraft - Electric - Jets (FS/W) 3 May 23, 2011 06:20 AM
Sold Change Sun Electronic retracts w/Lander struts hole digger Aircraft - Electric - Jets (FS/W) 2 May 06, 2011 01:27 PM
Video 6 and 12 blade 90mm fan sound test tom bacsanyi Electric Plane Talk 3 Dec 10, 2009 07:01 PM