Yes 1950's for 800GRX-L pwrd UNLIMITED!

[K.R.Joye]

Worked out a sweet deal with `Big Dog' on some 1950 nimh for my 1/8 scale Valasko Unlimited project. Cant wait to test these lightweight cells in setup!

[AndyKunz]

Ken,

How are you contacting him? I sent him an e-mail using the address on the site several weeks ago but no reply yet.

Thanks.

Andy

[Steve Vasdekis]

Ken, even though there is a weight savings with those batteries, they only deliever good voltage up to 23 amps and anything beyond that they drop voltage to about .9v per cell which translates to about 21v. Now if you use a good set of matched 3300s at 35 amps you have cells that deliever about 1.12v per cell which is 26.88v.

Take those numbers and add them up to about 800 RPM/v at 24 cells which I am getting the above numbers from and you have a large margin in prop RPM.

24-1950 AUP@25 amps=540 watts=17280 Prop RPM
24-GP 3300@35 amps=940 watts=21540 Prop RPM

[K.R.Joye]

STEVE why would they be using them for SAWS if they don't produce good voltage and amps? Doesn't make sense......

[Steve Vasdekis]

They don't work for SAWs as I remember reading that Miha Holc not using them after a few passes. The only way to get benefit from these cells to run something like a 16XL 32 of the 1950s and a x430 prop in a 12 cell rigger. This setup pulls about 25 amps and turns 30000 rpm not fast but does not kill the cells.

[Don Wollard]

Ken -

I would be careful with 1950's. There is a lot of mis-information around about them. I have first hand experiance(s).

First - they will not hold voltage well with repeated cycles or charges the same day. Also - there punch falls off quickly after the first charge and you can't get it back no matter what you do to them.

In short - the weight/size savings is not worth the performance drop, in my opinion. Its possible I had a bad lot - but we tested over 300 hundred cells with the same result.

[Steven Vaccaro]

Ken I thought I saw a big sell off of 1950's after the Saws.

[K.R.Joye]

Thanks for the advice guys, should have consulted this board first.

Funny BV didn't mention anything?????????????

Just emailed him to pull out of the deal, he hasn't sent them yet.

Ken

[Steve Vasdekis]

Not to say these batteries do not have any use, they work excellent in speed 400 applications.

[Steven Vaccaro]

Andrew has also had very good luck with these in 700 applications. Maybe he will chime in?

[Kmot]

I bought a bunch from both Donnie and Brian and man they work great in sport applications. So they are great, lightweight batteries for your sport runners. Just not good for racing I suppose but for me sport running is where I'm at. :)

[Brian Vega]

Ken, Got your E-mails! Will refund your money! No problem.. These cells work fine! Dont care what anyone says! At the Saws they couldnt handle the amp draw due to pulling 90 + amps... So to base there performance from the saws to what you planned on running is totally diffrent.... Anyway cells are still for sale! BV

[Andrewg]

I cant dis the 1950's - there is a lot of misinformation. Just prior to last years SAW's there was news that in pylon racing the weight is more important and these cells have set the bar higher than any other cell. BUT they are pulling 80-90 amps from them and throwing them away at the end of the day.

This advantage doesnt translate to boats. Like all things these and the 1700AUP are great if used appropriately.

Discharge testing by hills and Steve Neu show the 1950's are as good aas 2400's up to about 35 amps at 2/3's of the weight

The solution to voltage drop is to add a couple of extra cells

For 40 amps on 24 x 3300's would have a total of 26.28v (hills) the AUP1950's 23.76v (hills). Add 3 1950's and your voltage is up there and you have still saved about 17 oz !!

In short for applications with a current draw below 40; 35 to make the difference greater they are as good or more effective than RC2000s simply because they arent lifting that extra weight

[AndyKunz]

Originally posted by Steve Vasdekis
Not to say these batteries do not have any use, they work excellent in speed 400 applications.

They work great in 05, 700, Plett and larger setups too. You just have to know how to use them.

Andy

[K.R.Joye]

BV im sorry for breaking our agreement. Its my fault i wasn't very informed on the 1950's performance. I've had some incidents with nimhs (charging between heats) and the 1950s sound like they would also present some problems. Our 3 person team can't afford time consuming ripples that my exclude use from making a heat. We come very well prepared to race, i like everything we run to be as bulletproof as possible.

Ken Joye
`MACH 5 racing'