Battery 6ah vs. more

I'd love to see some pictures of your NiMh creations.

Can you send to me or upload somewhere like http://www.flickr.com.

This would also be a great how to article for Soaring.

john at derosaweb.com

Thanks

On 24 Apr, 11:20, ContestID67 wrote:
I'd love to see some pictures of your NiMh creations.

Can you send to me or upload somewhere likehttp://www.flickr.com.

This would also be a great how to article for Soaring.

john at derosaweb.com

Thanks

Just as a matter of interest .....

I am flying OPA's at the moment ( other peoples aeroplanes ) and have
a portable setup with Colibri logger and Ipaq PDA all driven from a
LiPo Electric R/C aircraft flight pack. A12v pack with 2200ma/hr
capacity. The power to volume/weight ratio is great. The pack weighs
about 100g and is about the size of 6 cigarettes! It drives the setup
for about 6 hours with the pda on all the time.

Ian

On Apr 24, 9:58*am, nimbusgb wrote:
On 24 Apr, 11:20, ContestID67 wrote:

I'd love to see some pictures of your NiMh creations.

Can you send to me or upload somewhere likehttp://www.flickr.com.

This would also be a great how to article for Soaring.

john at derosaweb.com

Thanks

Just as a matter of interest .....

I am flying OPA's at the moment ( other peoples aeroplanes ) and have
a portable setup with Colibri logger and Ipaq PDA all driven from a
LiPo Electric R/C aircraft flight pack. A12v pack with 2200ma/hr
capacity. The power to volume/weight ratio is great. The pack weighs
about 100g and is about the size of 6 cigarettes! It drives the setup
for about 6 hours with the pda on all the time.

Ian

I would never fly with LiPo on board. Let alone in someone elses ship.
I have quite a few of them for my R/C aircraft and have seen them at
their worst. Please be careful.

wrote:
On Apr 24, 9:58 am, nimbusgb wrote:

I am flying OPA's at the moment ( other peoples aeroplanes ) and have
a portable setup with Colibri logger and Ipaq PDA all driven from a
LiPo Electric R/C aircraft flight pack. A12v pack with 2200ma/hr
capacity. The power to volume/weight ratio is great. The pack weighs
about 100g and is about the size of 6 cigarettes! It drives the setup
for about 6 hours with the pda on all the time.

Ian

I would never fly with LiPo on board. Let alone in someone elses ship.
I have quite a few of them for my R/C aircraft and have seen them at
their worst. Please be careful.

You don't fly with a cell phone or a PDA?

Marc

On Apr 24, 12:30*pm, Marc Ramsey wrote:
wrote:
On Apr 24, 9:58 am, nimbusgb wrote:

I am flying OPA's at the moment ( other peoples aeroplanes ) and have
a portable setup with Colibri logger and Ipaq PDA all driven from a
LiPo Electric R/C aircraft flight pack. A12v pack with 2200ma/hr
capacity. The power to volume/weight ratio is great. The pack weighs
about 100g and is about the size of 6 cigarettes! It drives the setup
for about 6 hours with the pda on all the time.

Ian

I would never fly with LiPo on board. Let alone in someone elses ship.
I have quite a few of them for my R/C aircraft and have seen them at
their worst. Please be careful.

You don't fly with a cell phone or a PDA?

Marc

Not with lithium Polymer batteries. Lithium Ion, yes. Lithium
Polymer, no.

wrote:
On Apr 24, 12:30 pm, Marc Ramsey wrote:
wrote:
On Apr 24, 9:58 am, nimbusgb wrote:
I am flying OPA's at the moment ( other peoples aeroplanes ) and have
a portable setup with Colibri logger and Ipaq PDA all driven from a
LiPo Electric R/C aircraft flight pack. A12v pack with 2200ma/hr
capacity. The power to volume/weight ratio is great. The pack weighs
about 100g and is about the size of 6 cigarettes! It drives the setup
for about 6 hours with the pda on all the time.
Ian
I would never fly with LiPo on board. Let alone in someone elses ship.
I have quite a few of them for my R/C aircraft and have seen them at
their worst. Please be careful.
You don't fly with a cell phone or a PDA?

Marc

Not with lithium Polymer batteries. Lithium Ion, yes. Lithium
Polymer, no.


What makes you think the "lithium ion" cells used in PDAs, laptops, and
cellphones are any different than the "lithium polymer" cells used in
R/C aircraft? Have you ever looked at the cells inside a PDA, or inside
the plastic cases used for cellphone or laptop batteries? Nearly all
are lithium polymer these days (and the R/C suppliers get theirs from
the same factories, which is why they are relatively cheap), although
the laptop manufacturers, thanks to some rather public incidents, are
just starting to switch over to newer, somewhat less flammable, battery
chemistries...

Marc

On Apr 24, 1:17*pm, Marc Ramsey wrote:
wrote:
On Apr 24, 12:30 pm, Marc Ramsey wrote:
wrote:
On Apr 24, 9:58 am, nimbusgb wrote:
I am flying OPA's at the moment ( other peoples aeroplanes ) and have
a portable setup with Colibri logger and Ipaq PDA all driven from a
LiPo Electric R/C aircraft flight pack. A12v pack with 2200ma/hr
capacity. The power to volume/weight ratio is great. The pack weighs
about 100g and is about the size of 6 cigarettes! It drives the setup
for about 6 hours with the pda on all the time.
Ian
I would never fly with LiPo on board. Let alone in someone elses ship.
I have quite a few of them for my R/C aircraft and have seen them at
their worst. Please be careful.
You don't fly with a cell phone or a PDA?

Marc

Not with lithium Polymer batteries. Lithium Ion, yes. *Lithium
Polymer, no.

What makes you think the "lithium ion" cells used in PDAs, laptops, and
cellphones are any different than the "lithium polymer" cells used in
R/C aircraft? *Have you ever looked at the cells inside a PDA, or inside
the plastic cases used for cellphone or laptop batteries? *Nearly all
are lithium polymer these days (and the R/C suppliers get theirs from
the same factories, which is why they are relatively cheap), although
the laptop manufacturers, thanks to some rather public incidents, are
just starting to switch over to newer, somewhat less flammable, battery
chemistries...

Marc- Hide quoted text -

- Show quoted text -

Sorry, didn't mean to start an argument. Maybe my caution regarding
flying with R/C (foil bag) LiPo batteries is a little over the top. I
can live with erring on the side of caution. To each his own.

"Marc Ramsey" wrote in message
t...
wrote:


What makes you think the "lithium ion" cells used in PDAs, laptops, and
cellphones are any different than the "lithium polymer" cells used in R/C
aircraft? Have you ever looked at the cells inside a PDA, or inside the
plastic cases used for cellphone or laptop batteries? Nearly all are
lithium polymer these days (and the R/C suppliers get theirs from the same
factories, which is why they are relatively cheap), although the laptop
manufacturers, thanks to some rather public incidents, are just starting
to switch over to newer, somewhat less flammable, battery chemistries...




very interesting


mk5000

"Okay, the main air ducts lead to the central system. From there I
can take any branch and drop into the lobby. It's about a 20-plus foot drop
so. I'll probably break my leg - maybe both, but that's okay. This is good.
This is a good plane. Somebody uh, give me a screwdriver. "--Mike Cannon:
Las Veas

On Apr 24, 12:30*pm, Marc Ramsey wrote:
wrote:
On Apr 24, 9:58 am, nimbusgb wrote:

I am flying OPA's at the moment ( other peoples aeroplanes ) and have
a portable setup with Colibri logger and Ipaq PDA all driven from a
LiPo Electric R/C aircraft flight pack. A12v pack with 2200ma/hr
capacity. The power to volume/weight ratio is great. The pack weighs
about 100g and is about the size of 6 cigarettes! It drives the setup
for about 6 hours with the pda on all the time.

Ian

I would never fly with LiPo on board. Let alone in someone elses ship.
I have quite a few of them for my R/C aircraft and have seen them at
their worst. Please be careful.

You don't fly with a cell phone or a PDA?

Marc

Have you ever seen an R/C LiPo cell? No hard case. It is essentially
a tin-foil-like bag of chemicals with a very high energy density.