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Old Mar 09, 2010, 12:49 AM
Almost out of epoxy
Done Crashing's Avatar
Salt Lake City
Joined Sep 2007
606 Posts
I'm sensing a big wind day on Wednesday at lunchtime. Anyone interested? I can't quite tell which site will be best, Flight Park North vs. Ensign Peak, but I'm seeing some seriously strong surface wind forecasts.
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Old Mar 09, 2010, 12:07 PM
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Darth_Elevator's Avatar
The Beautiful Mountains of Utah
Joined Oct 2006
6,232 Posts
If it ends up being from the northwest, as currently predicted, Ensign won't be so great because we'd have to fly out over the cliffs on the west side. But the Point should be good. I'll see if I can make it down there tomorrow.
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Old Mar 09, 2010, 01:25 PM
Almost out of epoxy
Done Crashing's Avatar
Salt Lake City
Joined Sep 2007
606 Posts
My meteorologist friend says there will be too little wind on Wednesday, and it'll be very cold. So perhaps I am mistaken.

P.S. Did anyone ever notice that meteorologist sounds like "meaty urologist"?
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Old Mar 09, 2010, 01:30 PM
Hit Me! Please!
jwjohnson's Avatar
Provo, UT
Joined Jan 2005
3,997 Posts
Meaty Urologist?

Is that a urologist with large hands???
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Old Mar 12, 2010, 09:42 AM
Almost out of epoxy
Done Crashing's Avatar
Salt Lake City
Joined Sep 2007
606 Posts
Cliff, can you point me to that Slow Stick parts list? A friend of mine wants a motor/ESC/battery recommendation.
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Old Mar 12, 2010, 10:51 AM
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Darth_Elevator's Avatar
The Beautiful Mountains of Utah
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http://www.rcgroups.com/forums/showthread.php?t=965040
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Old Mar 12, 2010, 12:08 PM
Almost out of epoxy
Done Crashing's Avatar
Salt Lake City
Joined Sep 2007
606 Posts
Cliff,

Is that the best motor to make the slow stick fly ballistic (lots of vertical and stuff)? Or is there another one that does that job well?

A friend of mine built a Slow Stick using the GWS boom, but with a built-up covered balsa wing.
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Old Mar 12, 2010, 01:32 PM
Never enough time to fly!
ecase's Avatar
SLC, UT
Joined Sep 2006
1,444 Posts
I bought a lead-acid 12 volt, 8ah battery from Cabella's to power my battery charger in the field. Can anyone tell me how to measure the charge in this big battery? The instructions say it will take 15-18 hours to charge it completely but I would like to be able to check it to see when it needs a charge.
Thanks
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Old Mar 12, 2010, 01:42 PM
Almost out of epoxy
Done Crashing's Avatar
Salt Lake City
Joined Sep 2007
606 Posts
Have you looked at its voltage? That's the only indication of charge level. 12V is probably the nominal (i.e., discharged) voltage, and 13-14V is probably charged. For comparison, measure the voltage on your car battery and, assuming it's fully charged, that's the charged voltage.
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Old Mar 12, 2010, 01:57 PM
Never enough time to fly!
ecase's Avatar
SLC, UT
Joined Sep 2006
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OK, I can measure the volts, but do I need to measure the amps in some way?
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Old Mar 12, 2010, 01:59 PM
Almost out of epoxy
Done Crashing's Avatar
Salt Lake City
Joined Sep 2007
606 Posts
Nope, no need to measure amps. Amps only apply when you are running power through something.

Here's a crash course:

Volts are a measure of the potential energy stored in the battery.

Amps are a measure of how fast current is flowing, so amps are always 0 when the battery is disconnected.

--Dave
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Old Mar 12, 2010, 02:01 PM
Never enough time to fly!
ecase's Avatar
SLC, UT
Joined Sep 2006
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Thanks Dave. I learn something new every day if I pay attention.
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Old Mar 12, 2010, 02:07 PM
How do I change this text?
Darth_Elevator's Avatar
The Beautiful Mountains of Utah
Joined Oct 2006
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Quote:
Originally Posted by Done Crashing View Post
Is that the best motor to make the slow stick fly ballistic (lots of vertical and stuff)? Or is there another one that does that job well?
The motor I linked to is for lazy, relaxed flying, not for ballistic flying. I think Jeff (dukestarhopper) found a good one that turned his Slow Stick into a streak in the sky. Next time I see him I'll ask him which one he got.
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Old Mar 12, 2010, 02:10 PM
How do I change this text?
Darth_Elevator's Avatar
The Beautiful Mountains of Utah
Joined Oct 2006
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Quote:
Originally Posted by ecase View Post
The instructions say it will take 15-18 hours to charge it completely but I would like to be able to check it to see when it needs a charge.
Lead acid batteries will last longer if you top them off frequently. Even when you just use them or a little or don't use them at all, throw them on the charger regularly. I use a 2 amp trickle charger sometimes (it's actually a charger that I bought for car batteries a few years ago). If you happen to have the Turnigy accucell 6 charger, it will quick charge a lead acid battery at up to 5 amps. It's nice because it tells you exactly how many milliamps it put back into the battery so you can get an idea of how much of its capacity you're draining it with each usage.
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Old Mar 12, 2010, 03:24 PM
If It Aint Broke,I'll Break It
Rockin G's Avatar
United States, TX, Lockhart
Joined Dec 2008
2,872 Posts
I dont know exactly what battery you bought, but these are good for the small batteries, like on a 4 wheeler and riding mower batteries. I assume they would be good at larger batteries also. Harbor Freight float charger
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