Thunder Powers New 20-40C Battery Packs - eXtreme packs  
View related threads: (in this forum | in all forums)

Tower Hobbies
Enter up to 4 keywords or Tower stock numbers
Logged in as Guest



Users viewing this topic: none
  Printable Version
       

All Forums >> Electric Aircraft Universe >> Electric Pattern Aircraft >> Thunder Powers New 20-40C Battery Packs - eXtreme packs
Page: [1] 2 3   next >   >>  

Login
Message << Older Topic   Newer Topic >>
Thunder Powers New 20-40C Battery Packs - eXtreme packs - 9/15/2006 2:34:16 AM   
Pro pattern



Posts: 354
Joined: 4/19/2003
From: Savaneta, ARUBA
Status: offline 		Hello there everyone,

Has anybody seen or hear anything about the new battery packs from Thunder Power.
The eXtreme packs.
I’ve seen on several website these new packs.
http://www.espritmodel.com/
http://www.thunderpower-batteries.com/NewProducts.htm

Anybody has any more info on them?
I’ve seen there being offer in several mAh packs, but only in 1 or 2 parallel packs.


Has any one already tried them out?
Any more information are welcome.

Regards,
Danny Koolman
www.arubarcclub.com



_____________________________

Nobody is perfect, I’m nobody
3rd place, is just 2nd best loser
       Post #: 1

RE: Thunder Powers New 20-40C Battery Packs - eXtreme p... - 9/15/2006 7:24:47 AM   
Neo02



Posts: 269
Joined: 8/20/2003
From: Lugano, SWITZERLAND
Status: offline 		The packs should be the "new" reference packs for F3A, according to Charlie Wang (as spoken to at the EC 2006 in Buochs). 20 to 25C continuous and up to 50C burst. As far as I know, Gerd Giese of www.elektromodellflug.de should receive some for testing and measuring, results not expected before a couple of weeks though.

I am eagerly waiting for those packs to be available and flown by the top guys - only then we will know that they work without problems.

Regards,
-Fabrizio


_____________________________

Fabrizio Albonico
SUI 36291

(in reply to Pro pattern)
       Post #: 2

RE: Thunder Powers New 20-40C Battery Packs - eXtreme ... - 9/16/2006 2:51:20 PM   
Sprink



Posts: 2236
Joined: 4/23/2003
From: London, UNITED KINGDOM
Status: offline 		These are the same packs as used by flightpower (and a few other distributors). A friend has some of the FP 5000s and they do seem to give impressive power performance.

I'm still in two minds, as a rule I look at weight/capacity first, and these don't quite measure up as well. But whatever I'll be sticking with my prolite 6000's until next year anyway.

_____________________________

"If it doesn't break, it is probably too heavy"

(in reply to Neo02)
       Post #: 3

RE: Thunder Powers New 20-40C Battery Packs - eXtreme ... - 9/16/2006 4:00:15 PM   
Adamg-RCU



Posts: 722
Joined: 4/22/2003
From: Saskatoon, SK, CANADA
Status: offline 		My two 5s5000 eXtreme Series packs came in yesterday. They are soldered up, velcroed up, and will be flown soon. As soon as the rain stops, that is.

The pair of them weigh 1235g on my scale, compared to the pair of 5s3pV6000 weighing 1238g.

-Adam

(in reply to Sprink)
       Post #: 4

RE: Thunder Powers New 20-40C Battery Packs - eXtreme p... - 9/16/2006 10:35:08 PM   
papadontscreech


 

Posts: 37
Joined: 3/26/2005
From: , UNITED KINGDOM
Status: offline 		What is the claim to fame of these packs, they are heavier than the 5300s , also with the 80% rule then only 4000mah is available to keep the packs happy, I have trouble already in certain copnditions keeping within 80% of the 5300s, so I dont think they will be the best choice for a lot of FAI pilots, I realise they have a higher discharge rate but the 5300s are more than adequate, maybe they will appeal to certain motor setups where they current draw is higher, outside that I do not see the benefit.

(in reply to Pro pattern)
       Post #: 5

RE: Thunder Powers New 20-40C Battery Packs - eXtreme ... - 9/17/2006 12:41:54 AM   
Adamg-RCU



Posts: 722
Joined: 4/22/2003
From: Saskatoon, SK, CANADA
Status: offline 		papa, this is why I only have one 10s pack right now ;>

In the interests of evaluating these packs for F3A use, I'll be flying full P07/F07 flights and not taking it easy on the battery. If that uses more than 80%, I won't change anything. It's also worth pointing out that there is no evidence that 80% is special number - for all we know, 95% could be more accurate.

(in reply to papadontscreech)
       Post #: 6

RE: Thunder Powers New 20-40C Battery Packs - eXtreme p... - 9/17/2006 4:03:17 AM   
can773



Posts: 1642
Joined: 1/25/2002
From: Calgary, AB, CANADA
Status: online
quote:

ORIGINAL: papadontscreech

What is the claim to fame of these packs, they are heavier than the 5300s , also with the 80% rule then only 4000mah is available to keep the packs happy, I have trouble already in certain copnditions keeping within 80% of the 5300s, so I dont think they will be the best choice for a lot of FAI pilots, I realise they have a higher discharge rate but the 5300s are more than adequate, maybe they will appeal to certain motor setups where they current draw is higher, outside that I do not see the benefit.



I am not buying the 80% value....I routinely hit 90+ on my packs (just today was doing 4800-5000 in high winds....and am up to 120 cycles. Personally for the 5300's I think 85% is still a safe number to shoot for. Resting voltage is a better measure of how hard you are pushing things.


_____________________________

Chad Northeast

(in reply to papadontscreech)
       Post #: 7

RE: Thunder Powers New 20-40C Battery Packs - eXtreme p... - 9/18/2006 1:23:32 AM   
papadontscreech


 

Posts: 37
Joined: 3/26/2005
From: , UNITED KINGDOM
Status: offline 		Thats my point exactly,forget the 80% figure, if you use 4800-5000 in wind then the 5000s batterys would be emptied and would endanger the model should you need another run at landing, so in the real world I cannot see it being any use ( for FAI at least )

(in reply to can773)
       Post #: 8

RE: Thunder Powers New 20-40C Battery Packs - eXtreme p... - 9/18/2006 6:36:02 AM   
OhD


 

Posts: 413
Joined: 10/23/2002
From: west hills, CA, USA
Status: online 		If the new batteries have lower internal resistance you will get more voltage out of them at any throttle setting so you will throttle back and use less current to get the same flight performance. Right now the batteries are inefficient and a lot of the capacity is being lost in heat in the batteries. The airplane needs Watt-Hrs to complete its mission not Amp-Hrs. So if voltage goes up the current can come down to maintain the same Watt-Hrs.

We need some more data before we can decide if they are the way to go.

Jim O



quote:

ORIGINAL: papadontscreech

Thats my point exactly,forget the 80% figure, if you use 4800-5000 in wind then the 5000s batterys would be emptied and would endanger the model should you need another run at landing, so in the real world I cannot see it being any use ( for FAI at least )


(in reply to papadontscreech)
       Post #: 9

RE: Thunder Powers New 20-40C Battery Packs - eXtreme p... - 9/18/2006 9:12:53 AM   
Malcolm H



Posts: 274
Joined: 10/24/2002
From: glasgow, UNITED KINGDOM
Status: offline 		Jim,

This supposes some restraint on the part of the pilot. I have recently changed from Flightpower last generation 6300mAhr packs to 5300mAhr Prolites. The model is nearly 300g lighter and I have way more power but I still regularly put over 4000mAhr back in the packs and I am sure that it is due to leaning on the throttle too much.

One way round this is to prop down but everyone wants the extra power just in case or for windy weather (in Scotland read all the time).

The solution to that is to have a second throttle curve but I for one have never been happy with changing a models characteristics flight to flight. In my YS days I experimented with S shaped throttle curves with the flat part a significant percentage of the stick travel. This was set at a level which gave good cruise power and because it was a large part of the stick travel was easy to get into. What I would really like is an adjustable detent on the throttle stick. This could be set for cruise power or normal climb power but could be easily overridden when required. Full size military aircraft have just this to prevent "military" power levels being inadvertently selected.

Anyone know an easy way to do this on a 10X?

Malcolm

(in reply to OhD)
       Post #: 10

RE: Thunder Powers New 20-40C Battery Packs - eXtreme p... - 9/19/2006 3:05:19 PM   
cyphur01


 

Posts: 2
Joined: 11/16/2005
From: Tyler, TX, USA
Status: offline 		Malcolm,

The detent that you are talking about is easily attainable. One of my local pattern friends have done the very thing that you speak of. He sent in his 10X to have the throttle stick worked on. After years of use, the small detents that are felt every time we move the stick had worn away. He sent his 10X to Radio South and asked them to make a larger detent about mid throttle. It looks like they simply cut a little deeper groove around mid throttle. Now when he is flying he knows exactly where mid throttle is and I am sure they will be able to do that to any throttle position that you would want a detent in. Adjustable...now that is another story.

Nick

(in reply to Malcolm H)
       Post #: 11

RE: Thunder Powers New 20-40C Battery Packs - eXtreme p... - 9/19/2006 4:31:08 PM   
Malcolm H



Posts: 274
Joined: 10/24/2002
From: glasgow, UNITED KINGDOM
Status: offline 		Thanks for that Nick,

In the off season I'm going to investigate this further.

Malcolm

(in reply to cyphur01)
       Post #: 12

RE: Thunder Powers New 20-40C Battery Packs - eXtreme p... - 9/20/2006 4:02:44 AM   
Adamg-RCU



Posts: 722
Joined: 4/22/2003
From: Saskatoon, SK, CANADA
Status: offline 		I flew two flights on my new Thunder Power 2x 5s 5000mAh eXtreme Series pack today. I data logged flight 2, which was also the pack's second discharge.

Both flights were 8m15s from right before throttling up for takeoff until the plane had stopped on the runway. They were P07 competition-legal flights. There was no wind (Sweet!). I flew fairly large and a decent distance (160m?), and a reasonable speed. Recharging after the first flight put back in about 3700mAh.

It is a good time to be doing electric pattern. I'm flying the largest F3A plane in existance (ZNLine Twister), weighing in around 4970g, flying the FAI sequence, and yet I'm rarely going to full throttle.

Battery voltage is higher than my 6000 Pro Lites put out. When looking at the graph, take into consideration the low pack temperature and how new the packs are.

Adam Glatt
Team Thunder Power

Attachments
Click to see fullsize image.
Click for fullsize 		Click to see fullsize image.
Click for fullsize

(in reply to Malcolm H)
       Post #: 13

RE: Thunder Powers New 20-40C Battery Packs - eXtreme p... - 9/20/2006 5:58:05 AM   
OhD


 

Posts: 413
Joined: 10/23/2002
From: west hills, CA, USA
Status: online 		Hi Malcolm,

I totally agree with you. I find myself hitting full throttle more than I like and I did exactly the same thing with the throttle curve. I have a relatively flat slope in the midrange for cruise. It is still difficult to keep from hitting full throttle on verticals. The detent is a good idea. I heard Dave Patrick did that years ago.

Jim O

quote:

ORIGINAL: Malcolm H

Jim,

This supposes some restraint on the part of the pilot. I have recently changed from Flightpower last generation 6300mAhr packs to 5300mAhr Prolites. The model is nearly 300g lighter and I have way more power but I still regularly put over 4000mAhr back in the packs and I am sure that it is due to leaning on the throttle too much.

One way round this is to prop down but everyone wants the extra power just in case or for windy weather (in Scotland read all the time).

The solution to that is to have a second throttle curve but I for one have never been happy with changing a models characteristics flight to flight. In my