Senior Telemaster on only a 3S? - WattFlyer RC Electric Flight Forums - Discuss radio control eflight

Power Systems Talk about motors, ESC speed controllers, gear drives, propellers, power system simulators and all power system related topics

Senior Telemaster on only a 3S?

Old 12-18-2005, 01:20 AM
  #1  
Mike Freas
Member
Thread Starter
 
Join Date: Oct 2005
Location: Kaeohe Bay Hawaii
Posts: 989
Default Senior Telemaster on only a 3S?

I watched Radio Controlled Hobbies last night on DIY. They did a special on outrunner motors and had Hobby Lobby bring out the birds and reps for the show. While discusing the instalation of a motor on the STM ARF Mike Hines from HL said they were flying it on only a 3S pack. I find that a bit odd. I thought the minimum was a 5S? I'd like some input on this because I'm about done with mine and was set on getting a 5S2P 8000 mah pack for it with an AXI 4130/18.
Mike Freas is offline  
Old 12-18-2005, 02:38 AM
  #2  
Twmaster
Registered User
 
Twmaster's Avatar
 
Join Date: Aug 2005
Location: Dallas, TX, USA
Posts: 6,632
Default

Perhaps he misspoke?
Twmaster is offline  
Old 12-18-2005, 02:42 AM
  #3  
Mike Freas
Member
Thread Starter
 
Join Date: Oct 2005
Location: Kaeohe Bay Hawaii
Posts: 989
Default

Perhaps but I watched it again and he said a 3S pack and only 11.5 volts so the voltage and number of cells match.
Mike Freas is offline  
Old 12-18-2005, 02:46 AM
  #4  
Twmaster
Registered User
 
Twmaster's Avatar
 
Join Date: Aug 2005
Location: Dallas, TX, USA
Posts: 6,632
Default

Well I suppose that would track. Perhaps send an email to [email protected] ?

They have always been quick to reply to my inquiries.
Twmaster is offline  
Old 12-18-2005, 02:52 AM
  #5  
Mike Freas
Member
Thread Starter
 
Join Date: Oct 2005
Location: Kaeohe Bay Hawaii
Posts: 989
Default

Just shot them an e-mail. I will post up what they say.
Mike Freas is offline  
Old 12-19-2005, 06:44 PM
  #6  
Mike Freas
Member
Thread Starter
 
Join Date: Oct 2005
Location: Kaeohe Bay Hawaii
Posts: 989
Default

I guess I was all wrong with my choice of battery and motor. Hobby-Lobby doesn't mess around, they sent this first thing this morning!

Mr Freas
The Senior Telemaster that is shown in the video:
http://www.hobby-lobby.com/media/HLA007-SrTele.wmv
is flown with the setup that we recommend, the AXI4120/18, with a 14x10 prop and a 16 cell NiMH pack. We have also flown it with both the 3 cell and 4 cell Lipo batteries. When using the 3 cell you need to increase the prop size to a 15 or even a 16" prop. I'm not sure which motor you are planning to use 4120/18 or 4130/16 (you said 4130/18). This model does not need anything larger than a 4120 series motor unless you are planning to aerotow or something of that sort. A 5S pack is entirely possible, you would just need to reduce the prop size to keep the amp load in line. I doubt that you would be able to use the additional RPM available with the higher voltage pack, the Telemaster is not a high speed model. If I can be of any help, let me know.

Michael Hines
Product Development Manager
Hobby Lobby International
(615) 373-1444 ext. 207
Mike Freas is offline  
Old 12-19-2005, 07:09 PM
  #7  
mmmdowning
Member
 
mmmdowning's Avatar
 
Join Date: Aug 2005
Location: Spotsylvania, VA
Posts: 143
Default

I thought that was probably the best show they've had.
mmmdowning is offline  
Old 12-20-2005, 12:41 AM
  #8  
Twmaster
Registered User
 
Twmaster's Avatar
 
Join Date: Aug 2005
Location: Dallas, TX, USA
Posts: 6,632
Default

Originally Posted by Mike Freas View Post
I guess I was all wrong with my choice of battery and motor. Hobby-Lobby doesn't mess around, they sent this first thing this morning!

...
Like I said. Always a fast response. I'd sure love to see that DIY segment. Perhaps I'll see if I can D/L it from somewhere. What show was it from?

Last edited by Twmaster; 12-20-2005 at 02:32 AM.
Twmaster is offline  
Old 12-20-2005, 01:09 AM
  #9  
Greg Covey
Member
 
Greg Covey's Avatar
 
Join Date: Jul 2005
Location: Rochester, NY
Posts: 135
Default

Mike,

You can follow my Senior Telemaster thread on RCU. I'm using an AXI 4130 and a 6s 6400mAh pack.

If you do the math, flying weight is 10.5lbs, so, if you want at least 65w/lb, that's 683 watts. Divide 683 watts by a 3s Lithium voltage of 10.8v (3.6x3) and you get 63amps. Not the best setup for a 4120 so I suspect the power level is less than our desired 683 watts.

On my setup, I'll have a 6s voltage of 21.6v and a max current around 50amps for a power level of 1080 watts or about 100w/lb. This will provide some extra power when needed to get out of a sticky situation, tow a sailplane, or lift a good sized payload.
Greg Covey is offline  
Old 12-20-2005, 02:54 AM
  #10  
Matt Kirsch
Super Contributor
 
Matt Kirsch's Avatar
 
Join Date: Jul 2005
Posts: 2,086
Default

To put it all in perspective... There's more than one way to skin a cat.

Greg's is a no-nonsense, high performance rig while Mike Hines's goes to show you what little you can get away with and still have a plane that flies really well.

I set up a guy in my club with a 4130/16 on 20 NiMH cells on his Senior Telemaster, on floats nonetheless. He's absolutely thrilled with it. That huge wing and the big, slow-revving prop are perfectly matched. He flies it all winter long out of the corn field across from his house.
Matt Kirsch is offline  
Old 12-20-2005, 02:59 AM
  #11  
Twmaster
Registered User
 
Twmaster's Avatar
 
Join Date: Aug 2005
Location: Dallas, TX, USA
Posts: 6,632
Default

Darn you guys! There is a .60 size Telemaster hanging from the ceiling in my favorite LHS. This is just screaming for an E-Flite 60 outrunner!
Twmaster is offline  
Old 12-20-2005, 04:55 AM
  #12  
Mike Freas
Member
Thread Starter
 
Join Date: Oct 2005
Location: Kaeohe Bay Hawaii
Posts: 989
Default

I will most likely still go with a 5S pack and a 4120/18. On this set up I'm sure that the STM will lift my digital camera just fine. I'm more concerned about cost and flight times.
Mike Freas is offline  
Old 12-28-2006, 09:20 PM
  #13  
stanger89
Member
 
Join Date: Aug 2005
Posts: 163
Default

You know, on the subject of the RCH episode, did anyone else catch the comment at the beginning about the 70" Superstar? They stated it would fly for 20 minutes. Is that actually realistic on a high-performance aerobatic plane? I was looking forward to them talking about the power system in that but they never mentioned it.
stanger89 is offline  
Old 12-29-2006, 05:47 AM
  #14  
redgiki
Member
 
redgiki's Avatar
 
Join Date: Sep 2005
Posts: 768
Default

stranger89: 20-minute flight times are easily achievable on a high-performance bird. Just size the bird bird's batteries appropriately. Remember, though, that "high performance" for a 3D hoverbat is a completely different kettle of fish than a high-speed racer.

Most hovering is done at 1/2 throttle, as are many 3D aerobatics. Usually, your amp draw at 1/2 throttle is about 1/4 that drawn at full throttle! For maximum LiPo life, you should target at least an 8-minute to 10-minute flight (6C-8C discharge). If your WOT static tests suggest you'll get an 8-minute flight wide-open, you should get far longer than that if you're hovering around at half-throttle.
redgiki is offline  
Old 12-29-2006, 05:06 PM
  #15  
stanger89
Member
 
Join Date: Aug 2005
Posts: 163
Default

Yeah, maybe I just don't like the pricetag associated with 20 minute flights, especially for a bird that size :p
stanger89 is offline  
Old 12-31-2006, 04:26 PM
  #16  
ragbag
Super Contributor
 
Join Date: Jul 2005
Posts: 1,344
Default

Originally Posted by Mike Freas View Post
I watched Radio Controlled Hobbies last night on DIY. They did a special on outrunner motors and had Hobby Lobby bring out the birds and reps for the show. While discusing the instalation of a motor on the STM ARF Mike Hines from HL said they were flying it on only a 3S pack. I find that a bit odd. I thought the minimum was a 5S? I'd like some input on this because I'm about done with mine and was set on getting a 5S2P 8000 mah pack for it with an AXI 4130/18.
I have a Senior Telemaster sitting on the shelf, Saito 72 with 2# lead in the belley to help the float in her.
That will be replaced with the 4130 and a rack of four cell A123's. Now I can get rid of the .45 caliber lead ball and put it back in my black powder bag.


.................................................. .......................
ragbag is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
IFlyTailies
Airplanes - Electric For Sale & WTB
2
02-20-2008 11:09 PM
Mike Freas
General Electric Discussions
44
02-18-2008 03:56 PM
William L Baker
Airplanes - Electric For Sale & WTB
1
11-27-2007 12:10 PM
JUDGE
Sport Planes (Formerly I/C & Gas Conversion)
6
01-04-2006 08:25 PM
Greg Covey
Beginners
2
11-04-2005 01:21 AM

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On


Quick Reply: Senior Telemaster on only a 3S?


Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

Copyright 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.

Page generated in 0.08506 seconds with 11 queries