Search: Posts Made By: write2dgray
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06-01-2011, 10:41 PM
Replies: 43
Views: 22,499
Posted By write2dgray

You're very welcome Frank! Nothing added...

You're very welcome Frank!

Nothing added recently, but here's an updated link for those looking for this info:
http://www.progressiverc.com/research

Cheers,
David
02-02-2010, 07:58 PM
Replies: 26
Views: 7,590
Posted By write2dgray

Looks like the ChargeBug by Helibug has gone the...

Looks like the ChargeBug by Helibug has gone the way of the dodo. All I can find on their site now is TRex e-conversion kits.
10-31-2009, 12:10 AM
Replies: 6
Views: 2,622
Posted By write2dgray

Also, look at parallel charging as a handy...

Also, look at parallel charging as a handy solution for packs with the same cell count. Here is some good reading and examples of such:

http://www.rcgroups.com/forums/showthread.php?t=932319
...
09-30-2009, 02:04 AM
Replies: 19
Views: 2,446
Posted By write2dgray

I'm always glad to help. I know it all...

I'm always glad to help.

I know it all comes around, and the recognition alone in your post above more than compensates me for my time and effort.

Let me know if there is ever anything I can...
09-20-2009, 07:54 PM
Replies: 19
Views: 2,446
Posted By write2dgray

Well thank you Bud, I know it all comes back...

Well thank you Bud, I know it all comes back around.

And it was worth it to see bomb, peace, and miasma woven neatly into one short post. You are very welcome and I hope she has an adventurous,...
09-19-2009, 07:52 PM
Replies: 19
Views: 2,446
Posted By write2dgray

Well...maybe just a little :p>, but aren't we...

Well...maybe just a little :p>, but aren't we all!

Ran a few cycles, the pack is working okay, but is not that hot as far as performance goes. Still good for some apps, but not a strong performer...
09-18-2009, 04:41 AM
Replies: 19
Views: 2,446
Posted By write2dgray

Well, pack received (thank you USPS) and proper...

Well, pack received (thank you USPS) and proper voltages here on all cells as measured with a Fluke - 4.148, 4.157, 4.158. 12.57V on the main output with no intermittent behavior and all connections...
09-15-2009, 05:58 AM
Replies: 19
Views: 2,446
Posted By write2dgray

Oops, sorry I was unclear - the offer was to...

Oops, sorry I was unclear - the offer was to investigate (repair) and send her on back. Address on the way :).

Cheers,
David
09-15-2009, 02:35 AM
Replies: 19
Views: 2,446
Posted By write2dgray

If you'd care to send it my way I wouldn't mind...

If you'd care to send it my way I wouldn't mind taking a look, my curiosity is piqued.

PM for an address if you're interested.

Cheers,
David
09-11-2009, 11:50 PM
Replies: 19
Views: 2,446
Posted By write2dgray

Yep, I'm going with the above - faulty solder at...

Yep, I'm going with the above - faulty solder at the Deans connector. Only other option is a bad connection at the tabs to the cells, should be relatively easy to troubleshoot and repair. One thing...
09-05-2009, 02:08 AM
Replies: 26
Views: 7,590
Posted By write2dgray

One year later, the HeliBug and UltraPower are...

One year later, the HeliBug and UltraPower are still the two most powerful single channel lipo chargers on the market.

Both are fixed output (ultra charger adjustable via computer with $80...
Replies: 110
Views: 17,405
Posted By write2dgray

Yep, ol' JR 8103H for me with only Berg...

Yep, ol' JR 8103H for me with only Berg receivers. Never a glitch or convincing reason to go 2.4 GHz yet. Now if Jeti could get there 2.4 systems with telemetry together for the right price I'd be...
09-04-2009, 10:38 PM
Replies: 9
Views: 3,768
Posted By write2dgray

Easy Rodneh, slow down please. EE to EE here, no...

Easy Rodneh, slow down please. EE to EE here, no horn tooting necessary. I have done my "homework" and do not speak without considerable thought and research on this matter.

Newer lipos hold...
09-04-2009, 06:15 PM
Replies: 9
Views: 3,768
Posted By write2dgray

The issue is that the voltage to capacity curve...

The issue is that the voltage to capacity curve for higher C rated batteries is often quite different than the last generation of lower C rated (higher internal resistance) lipos.

So, although...
09-04-2009, 12:20 AM
Replies: 9
Views: 3,768
Posted By write2dgray

What Rodneh said. One note to add - be careful...

What Rodneh said. One note to add - be careful about using too much capacity the first few times until you get a feel for it. If the batteries are different C ratings or generations of lipos, one...
05-28-2009, 10:31 PM
Replies: 9
Views: 3,271
Posted By write2dgray

Can you use the same Crimpers used with...

Can you use the same Crimpers used with APP/Sermos connectors and do you know if these connectors are compatible? They certainly bare a striking resemblance.

- David
04-01-2009, 08:01 PM
Replies: 8
Views: 3,313
Posted By write2dgray

Doubt they are A123, they don't make any cells...

Doubt they are A123, they don't make any cells rated at 2100 mAh or 10C. Any chance you can post a couple of pics or share the exact writing which likely appears on the cells?

- David
04-01-2009, 07:44 PM
Replies: 13
Views: 5,647
Posted By write2dgray

It's all evolutionary, not revolutionary. Pick...

It's all evolutionary, not revolutionary. Pick up a decently reputable lipo with the C rating you need for the job, and get out and fly!

Also, to correct one small point, ThunderPower ProLites...
Replies: 110
Views: 17,405
Posted By write2dgray

Thanks Mike! Now, (and sorry for straying...

Thanks Mike! Now, (and sorry for straying slightly off topic) does anyone have a link to a write-up on this procedure? Does the large copper antenna connector remain on the back of the module as...
Replies: 110
Views: 17,405
Posted By write2dgray

I fly a JR 8103H as well with red 1/2" RCStyx...

I fly a JR 8103H as well with red 1/2" RCStyx (http://progressiverc.com/RCStyx.html) in place of the tiny stock sticks.

I am interested in that Spektrumization you've done there. What module did...
03-09-2009, 10:17 PM
Replies: 3
Views: 1,203
Posted By write2dgray

Yes, that Pyramid power supply set at 12V will...

Yes, that Pyramid power supply set at 12V will work great with PLENTY of power onboard.

- David
Forum: Power Systems
03-05-2009, 12:02 AM
Replies: 35
Views: 4,130
Posted By write2dgray

And here's a list of motors that may broaden the...

And here's a list of motors that may broaden the search:
http://progressiverc.com/Brushless_Motor.html

and ESCs:
http://progressiverc.com/Brushless_ESC.html

Good luck!

- David
03-01-2009, 04:10 AM
Replies: 20
Views: 4,452
Posted By write2dgray

As a general rule: I wouldn't recommend...

As a general rule: I wouldn't recommend discharging lipos down to 3.0V, 3.5V is about as low as you want to go even when seeking max. capacity as in during a discharge test. This will damage and...
03-01-2009, 04:06 AM
Replies: 4
Views: 1,523
Posted By write2dgray

I concur, unless you are charging tiny batteries...

I concur, unless you are charging tiny batteries it's probably not a lot of use. Considering it drained your car battery, whatever you are charging is probably more than this little guy is designed...
03-01-2009, 04:05 AM
Replies: 5
Views: 1,813
Posted By write2dgray

Capacity's down around 1100 from up over 1200, a...

Capacity's down around 1100 from up over 1200, a little drop (100 mAh) over those 8 months and 40 cycles. Voltage under load looks a little down, but only slightly at around 10.3 vs. 10.4V. ...
03-01-2009, 03:58 AM
Replies: 12
Views: 1,499
Posted By write2dgray

Bad links, but suffice it to say that A123s are...

Bad links, but suffice it to say that A123s are ahead of the class when it comes to LiFePo4s and others are at best respectable seconds.

- David
02-09-2009, 11:47 PM
Replies: 33
Views: 10,594
Posted By write2dgray

Just let me know - available in black, red,...

Just let me know - available in black, red, silver (clear), blue, and now gold anodized for the 1/2" size, they offer a huge improvement in grip (and bling :)) over the little, stock plastic sticks....
02-09-2009, 05:42 PM
Replies: 1,865
Views: 117,968
Posted By write2dgray

Slush and snow in Seattle. Ready for Spring, or...

Slush and snow in Seattle. Ready for Spring, or better yet Summer.
02-09-2009, 05:38 PM
Replies: 33
Views: 10,594
Posted By write2dgray

Nice list Frank - great work! How 'bout...

Nice list Frank - great work!

How 'bout adding me up here - www.ProgressiveRC.com

My RCStyx are designed, machined, and anodized here in the USA!

Cheers,
David
02-07-2009, 12:45 AM
Replies: 27
Views: 7,679
Posted By write2dgray

Same thing. Just more confusing nomenclature.

Same thing. Just more confusing nomenclature.
Showing results 1 to 30 of 151
 


 
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