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Next D . Fast Lad Performance . Ace Hobby

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e-Miniature Aircraft Furion - Razor - Ion-X > WoW Fury Extreme ION see the Video
 
 
Taipan
Key Veteran
Location: Sydney, Australia

How about using smaller packs with the same current output for insnae weight-to-power ratios? It'd only last 5mins or so which is more than enough for a comp routine.

Yeah, don't like the batteries smashing up in crashes.

How come the ION flew w/o a canopy? It'd cool it better but huh?
12-08-2003 Over year old.
 
 
Futura SE
Veteran
Location: Fayetteville, Arkansas

Ben,
I agree on the cost over the long haul. I was just trying to make the point that you have the potential to crash and take out the packs and with glow all you can take out is about 20 oz. of fuel most of the time and I have never busted a tank. The one thing I haven't. Yes, the new astro charger will do the packs nicely, but then you have to haul two of them and then another to handle your TX and RX. Carrying a couple of charged packs to the field is the answer but then you carry about 2K worth of batteris to the field. You must have more money than I do. I carry a couple of packs for my Joker, but nicads are like $3 a cell too for 2400 mah's. I MORE than anyone want some LiPo's I just can't see that they are even close to affordable yet.
There was not a lot of misinformation in the thread. Talk to the guy at thunderpower as he will readily tell you flying like we want to they are not going to last real long. Like you said about 300 flights and the last 50 or so they will not be like the first 250. I know I have been testing the things for a while. They are superb, but not bulletproof. No memory and all yes, but they have as many quirks as nicads or anything else. I have been using them for a while and tested several sets. Actually my favorite is a 4550 mah set. SUPER low weight and will do 20C. Makes my Joker go like the space shuttle. You get like 8 minutes of hard as you can go at it or 12 of mild 3D and sport flying. Cost is less than the big ones the Ion had on it. Depends simply on what you want to do. I would just like to have two sets of the small packs.

Scooter Ross
HUI Robbe Rep.
Minicopter Factory Rep.
12-08-2003 Over year old.
 
 
Ben74
Senior Heliman
Location: Long Beach, CA

yeah, crash damage is a risk with expensive batteries. i am redesigning my electrics' frames so that the batteries can be carried inside the frames. this will give them some protection in a crash. other have been attaching CF or G10 side plates to the batteries to give them some structral reinforcement.

scooter, which cells are you referring to that will do 20C? the only ones i know of are the kokam 250s, but you can't build a 4550mah pack out of 250s. besides, that would be a soldering and cell balancing nightmare.
12-08-2003 Over year old.
 
 
Futura SE
Veteran
Location: Fayetteville, Arkansas

Ben,
Joe Howard at Vario/Minicopter USA has been trying to get set up to get his own cells instead of TP packs. They are military grade cells that are used in a UAVs. There are actually some insane cells out there if your pockets are deep enough. They have to be bottomless pits just about. Joe has planned and I don't know about now but he planned to sell the small pack for like $600-625 and the big 14000mah packs at like $800. I say 14000, it is the same specs as the Thunderpower packs except the cells Joe has will dump much better. The ThunderPower does like 8C I think and the ones Joe has does like 15C on the big one. The one thing he has to get setup (and I don't think he has finished) is the ability to make the packs as he would be making them to fit a Joker of course. The Actro likes 32 nicads or 38v nominal. That makes out to be 2 five cells packs instead of two 16 cell nicad. That is a big benefit of the Joker as the packs are totally inside it. I have had a crash with mine and the packs were perfectly fine. Crash was not that bad though. No way to protect from a nasty crash.

Scooter Ross
12-09-2003 Over year old.
 
 
Ben74
Senior Heliman
Location: Long Beach, CA

interesting. the batteries seem to be getting better every day. now we just need them to be cheaper. the latest batteries joker usa is selling are 4400mah 11s2p tanics. the pack is super light, and can do 9-10C. the actronic speed controls can handle 11 LiPos, since they peak at only 42V.
12-09-2003 Over year old.
 
 
Futura SE
Veteran
Location: Fayetteville, Arkansas

Ben,
Yes, the actro SC's can do 42V as the manual for them says, but the motor I run the 24-4 (3D motor) can not handle it. Actually the 24-4 the spec sheet says will perform best at 30 nicads or 36V instead of the 32 cells. The 24-5 Actro (sport longevity) likes the 32 the spec sheet says. I have ran 30 and 32 and I get more pop from 32 so I run them. Besides building a 32 cell pack is much easier than two 15 cell packs. I think that 10 Lipos are the best of both worlds. Right where you want to be for the motors liking. The Lipos I tested were the 14000mah and they were ThundPower a while back and would only do like 8C and I was less than impressed with them. Flight time was way up, but performance was not. They weighed as much as 32 nicads almost. This was 5 months ago though. Actually Lithium Sulphur is the big thing on the horizon. They will be out soon as it will not hardly take any retooling to make them and they are as much better than Lipos as Lipos are than nicads. When the LiSulphurs come out the Lipos will be cheap as obsolete things get cheap fast. Just look at my laptop for example. Don't get me started on that topic.


Scooter Ross
12-09-2003 Over year old.
 
 
Ben74
Senior Heliman
Location: Long Beach, CA

brushless motors don't actually have voltage limits (within reason). manufacturers give suggested cell counts, but the only real limits you have to worry about are rpm and heat. current is what causes heat, not voltage, so you could go up to 100V or more as long as the heat (current) and rpm stay within limits. i have run my actro 32-3 on as much as 40 cells (58V+).
12-09-2003 Over year old.
 
 
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Esprit Model . Thunder Power RC . Real Raptors

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e-Miniature Aircraft Furion - Razor - Ion-X > WoW Fury Extreme ION see the Video
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