Go Back  RCU Forums > RC Boats > Speed - Electric
Reload this Page >

Prince 25" Mono

Notices
Speed - Electric For all your electric boating needs.

Prince 25" Mono

Old 08-11-2008, 11:55 PM
  #251  
FHHOBBIES
Senior Member
Thread Starter
 
Join Date: Feb 2005
Location: Winnipeg, MB, CANADA
Posts: 401
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Prince 25" Mono

Well I would be very happy with 10min! I do have some smaller Zippy cells on the way that I will test in a micro cat and see how they work. They are cheap.
Old 08-12-2008, 12:13 AM
  #252  
jacob711
Senior Member
 
Join Date: Nov 2005
Location: perth, AUSTRALIA
Posts: 826
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Prince 25" Mono

don't get all excited because im not totally sure on the runtime part, but from what ive read it would be somewhere around 5-13mins, i only have some mini electric boats and gas boats so i don't have a whole lot of experience with this stuff
Old 08-12-2008, 01:28 AM
  #253  
ozzie-crawl
Senior Member
 
Join Date: May 2007
Location: gold coast, AUSTRALIA
Posts: 835
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Prince 25" Mono

will order new motor thursday going to try a 12 turn fiego 540s see how it goes on 3s. the other motor i was thinking of was the blackjack motor they are a 6 pole motor with heaps of torque but then i would have to change batteries and i have already brought the 3s cells. hopfully they will turn up this week. FHHOBBIES them zippy cells are good i have had them in my 32" offshore cat running a 2800kv xl motor and they never get hot. was running them 4s 2p but they are only 2200s
Old 08-12-2008, 06:45 AM
  #254  
FHHOBBIES
Senior Member
Thread Starter
 
Join Date: Feb 2005
Location: Winnipeg, MB, CANADA
Posts: 401
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Prince 25" Mono

540S will be nice to see, keep us posted on that for sure. Actually I think I was reading that the 540S was very sim to the 380XL but I don't think it was ever confirmed, dunno. That motor Bass is getting I think is a 380XL. I think the 540S may be a ggod motor, I have a good feeling! lol. I will try them Zippy cells, it is nice to hear they are good because I thought they would be not so good for the price.
Old 08-14-2008, 08:36 PM
  #255  
Basstronics
Senior Member
My Feedback: (2)
 
Join Date: Jun 2008
Location: Elmore, OH
Posts: 557
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Prince 25" Mono

Just got my motor in tonight... dang its huge.

Havent been able to mount it yet...
Old 08-14-2008, 10:06 PM
  #256  
FHHOBBIES
Senior Member
Thread Starter
 
Join Date: Feb 2005
Location: Winnipeg, MB, CANADA
Posts: 401
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Prince 25" Mono

lol, sweet, get her in there!
Old 08-15-2008, 06:49 AM
  #257  
Basstronics
Senior Member
My Feedback: (2)
 
Join Date: Jun 2008
Location: Elmore, OH
Posts: 557
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Prince 25" Mono

I dont think the slots are enough for the narrow pattern on the motor. Need to get some light in there, then I might be able to hit the holes.
Old 08-15-2008, 06:53 AM
  #258  
FHHOBBIES
Senior Member
Thread Starter
 
Join Date: Feb 2005
Location: Winnipeg, MB, CANADA
Posts: 401
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Prince 25" Mono

Don't make me come over there! I think the mounting holes are the same, keep in mind also the the motor has two sets of holes, one wide and one narrow.
Old 08-15-2008, 09:37 AM
  #259  
ozzie-crawl
Senior Member
 
Join Date: May 2007
Location: gold coast, AUSTRALIA
Posts: 835
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Prince 25" Mono

still waiting for pics&video [sm=72_72.gif]
Old 08-15-2008, 02:16 PM
  #260  
Basstronics
Senior Member
My Feedback: (2)
 
Join Date: Jun 2008
Location: Elmore, OH
Posts: 557
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Prince 25" Mono

One set the same size as the old motor that are narrow, one set thats smaller diameter screw and larger spread...



Im wishing I would of bought that aluminum water cooled motor mount. Providing this motor can make this boat move good with my props.
Old 08-15-2008, 04:55 PM
  #261  
FHHOBBIES
Senior Member
Thread Starter
 
Join Date: Feb 2005
Location: Winnipeg, MB, CANADA
Posts: 401
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Prince 25" Mono

I think my next run will be 38-40mm prop and 2P 2500s just to see how it goes.
Old 08-15-2008, 09:46 PM
  #262  
Basstronics
Senior Member
My Feedback: (2)
 
Join Date: Jun 2008
Location: Elmore, OH
Posts: 557
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Prince 25" Mono

Got the motor in the boat tonight.

I am currently working on the ESC. I bought that new $6.86 water cooling block from r2hobbies to add to my ESC. What a mistake that was... Its about the crappiest (inser s word here) piece of aluminum. Looks like a beaver made it... Just a crappy aluminum block with 2 holes drilled into it and 4 tubes stuffed into the holes. I could of made something nice on my drill press...

Anyways the cooler cant extend the same direction as the wires ans the ESC's caps are in the way. So I gotta go across.

Also I cant find any thermal grease outside that for computers. That was $8 a drop at Radio Shack- I wasnt buying that...

Also I cant find any heat shrink to go over the ESC unless I want to buy in bulk or pay $9 shipping at an online rc boat store...
Old 08-15-2008, 11:02 PM
  #263  
FHHOBBIES
Senior Member
Thread Starter
 
Join Date: Feb 2005
Location: Winnipeg, MB, CANADA
Posts: 401
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Prince 25" Mono

Well thats not good, I have 2 of the larger ones on the way for my 120A ESCs, ah well. You do not need a heat sink with the water block but I wonder if you can cut a piece of aluminum about 1/8" thick as a spacer for the block so you can clear the caps? I got some thermal paste from OSE $2.99 and when I looked it said Radio Shack on it... small tube but will still last a long time because you don't use a lot, just a small amount. To make my own cooling plate I just use a 1/8 drill bit down the fins and shove 1/8 aluminum tube down the slots with some thermal grease.
Attached Thumbnails Click image for larger version

Name:	Tr51500.jpg
Views:	24
Size:	104.8 KB
ID:	1012348  
Old 08-15-2008, 11:07 PM
  #264  
FHHOBBIES
Senior Member
Thread Starter
 
Join Date: Feb 2005
Location: Winnipeg, MB, CANADA
Posts: 401
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Prince 25" Mono

Bass, do you have any places around that make battery packs or sell batteries? I have a couple places around here that do that and have lots of shrink wrap in any size.
Old 08-16-2008, 05:48 AM
  #265  
785boats
 
Join Date: Aug 2007
Location: Brisbane, AUSTRALIA
Posts: 371
Likes: 0
Received 1 Like on 1 Post
Default RE: Prince 25" Mono

Hi guys .
We've spoken a bit over at R/C Groups on the 'Bulletproof' thread.
I've been reading this thread with interest. A lot of different combinations being worked on here. That's great.
Just thought I'd show you what this little hull will do with the motor & ESC from the SV27/Blackjack hulls.
The prop is a 445. Batteries are a pair of 20C 3600 packs in series.
Will try a 645 prop next week. The motor has bags of torque for that size prop.
[link]http://www.youtube.com/watch?v=CWoMBY6PgiI[/link]
Attached Thumbnails Click image for larger version

Name:	Om34093.jpg
Views:	24
Size:	63.0 KB
ID:	1012516   Click image for larger version

Name:	Li20889.jpg
Views:	20
Size:	63.0 KB
ID:	1012517  
Old 08-16-2008, 08:09 AM
  #266  
FHHOBBIES
Senior Member
Thread Starter
 
Join Date: Feb 2005
Location: Winnipeg, MB, CANADA
Posts: 401
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Prince 25" Mono

Not bad, what kind of runtime do you get with that setup?
Old 08-18-2008, 09:46 AM
  #267  
Basstronics
Senior Member
My Feedback: (2)
 
Join Date: Jun 2008
Location: Elmore, OH
Posts: 557
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Prince 25" Mono

FHH can you get me that Radioshack part number for the heat transfer grease?

Im going to try getting mine in the water next few days. Not tonight
Old 08-18-2008, 01:00 PM
  #268  
785boats
 
Join Date: Aug 2007
Location: Brisbane, AUSTRALIA
Posts: 371
Likes: 0
Received 1 Like on 1 Post
Default RE: Prince 25" Mono

Not sure on the run times yet as that run in the video was on batteries that were nearly gone from all the previous testing on different props.
I didn't have a lipo cutout on that ESC but I'll put one on this week. Then I can run with a bit more confidence.
When I put the X645 prop on I'll time each run & do it until the Lipo Shield cuts out at 3.0v/cell. This will be done in 5 lap blocks as this is the lenght of most of our races.
I'll also check the voltage of the cells after each run to see how much is taken out of the batteries each time.
All the best.
Paul.
Old 08-18-2008, 06:53 PM
  #269  
FHHOBBIES
Senior Member
Thread Starter
 
Join Date: Feb 2005
Location: Winnipeg, MB, CANADA
Posts: 401
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Prince 25" Mono

My tube says... 276-1372 A the link to where I got it is... http://www.offshoreelectrics.com/search.php
Old 08-19-2008, 04:00 AM
  #270  
ozzie-crawl
Senior Member
 
Join Date: May 2007
Location: gold coast, AUSTRALIA
Posts: 835
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Prince 25" Mono

i was under the impression you couldnt run lipos on sv27 esc because no support with cut of but found a thread the other day were aquacraft say that the sv27 esc is auto detect for lipos
Old 08-19-2008, 01:48 PM
  #271  
785boats
 
Join Date: Aug 2007
Location: Brisbane, AUSTRALIA
Posts: 371
Likes: 0
Received 1 Like on 1 Post
Default RE: Prince 25" Mono

'no stick' posted this over in R/C Groups. Thanks Ed.

[Quote]
SPECS: Length: 2.76" (70mm)
Width: 1.30" (33mm)
Height: .39" (10mm)
Weight: 1.76oz (50g)
Input Voltage: 6-12 cells NiCd/NiMH
2-4 cells LiPo
(20V input w/o BEC)
Output Current: 45A continuous maximum
50A surge maximum
Max Output Power: 500 watts
On-resistance: .008 ohms
Operating frequency: 8.5kHz
BEC: 5V/2A
Low Voltage Cutoff: Battery voltage x .67
Thermal Cutoff: 230°F (110°C)
Timing Angle: 12°
Brake: ON/OFF

So you are OK to go with Lipo, [Quote]

Be careful with the cut out though.
A fully charged pack is 4.2v/cell and .67 of that is 2.8v/cell
If you plug in a pack that is half used say 3.6v/cell then .67 of that is 2.4v/cell
In my opinion both those values are too low as I like to set my cutouts no lower than 3.0v/cell.
What voltage do you guys run your packs down to?
Regards.
Paul.
Old 08-19-2008, 04:58 PM
  #272  
FHHOBBIES
Senior Member
Thread Starter
 
Join Date: Feb 2005
Location: Winnipeg, MB, CANADA
Posts: 401
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Prince 25" Mono

I try to never go below 3V per cell or 80% capacity.
Old 08-20-2008, 01:20 AM
  #273  
ozzie-crawl
Senior Member
 
Join Date: May 2007
Location: gold coast, AUSTRALIA
Posts: 835
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Prince 25" Mono

yea always cut mine at 3v. looking at the ammo 2300 with 4s 2p 3600.
Old 08-20-2008, 06:08 AM
  #274  
Basstronics
Senior Member
My Feedback: (2)
 
Join Date: Jun 2008
Location: Elmore, OH
Posts: 557
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Prince 25" Mono

Got my thermal grease yesterday at Radio Shack, thanks FHH for the info.

Now tonight to get it all back in the boat and go for a run!

Im going to just zip tie the cooler to the PCB ESC as I have no shrink wrap... Only way Im going to get some is to buy it from OSE and with $8.75 shipping on $5 or less of stuff, its hard to do.
Old 08-20-2008, 06:39 AM
  #275  
FHHOBBIES
Senior Member
Thread Starter
 
Join Date: Feb 2005
Location: Winnipeg, MB, CANADA
Posts: 401
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Prince 25" Mono

Bass measure the length, width, and height of the ESC and I will see if I have some for ya, it would only cost me a stamp to ship. I do bet though if you send steven at OSE and e-mail he would ship you some regular mail, worth a shot?

Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell or Share My Personal Information -

Copyright © 2023 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.