Understanding Batteries 101

[Bricks]

we seem to have a one man crusader amongst us

Does not mention one single battery, kind of useless in the context of this thread.

 

[AIRFORGE]

 

[Captain Mouser]

All LIPO batteries then are charged at the wall outlet? For how long? And my airplane calls for 5,640 mah. Under 2 ibs. 560 grams weighing in now. Should be under 2 ibs. or just under 1 kg. In the video they only give 1000 mah. They just go on watt factor then? 300 watts is the watt factor for a 2 ibs airplane. Which do I buy? Steps I took to get the mAh.

1. At 300 watts used for the watt factor it comes out to this…

2. The formula i used. Watt factor/battery voltage = x

3. y = (x) x (10/60)/0.80 < === this is the battery capacity. 0.80 is the 80% rule discharge rate. 10/60 is the fraction in 10 minute flight Time.

4. y = mAh or milliamperes/hour.
y x 1000 = 5,640 mah.

Also this airplane, I threw it and it flew for 15 yards and it went straight. So good to go on.

 

[Bricks]

All LIPO batteries then are charged at the wall outlet? For how long?

Do not really understand what you are asking, unless it pertains to LIPO chargers. If it is there are 12 volt 24 volt DC LIPO chargers which will do both DC or plugged into a wall outlet 120 volt.99.9% of chargers do a balance charge and control when the battery is fully charged. What controls length of time to charge comes down to the amperage chosen to charge the battery.

 

[bisco]

All LIPO batteries then are charged at the wall outlet? For how long? And my airplane calls for 5,640 mah. Under 2 ibs. 560 grams weighing in now. Should be under 2 ibs. or just under 1 kg. In the video they only give 1000 mah. They just go on watt factor then? 300 watts is the watt factor for a 2 ibs airplane. Which do I buy?

Can you add some context to your post?
There’s a lot more to batteries than mah.
All the electronics work together in concert, what video are you referring to?

 

[Captain Mouser]

Also, anybody have comments on Race Wings? They look pretty scary at launch? Dangerous. I was checking out videos and they can turn back to you. I made two models, one airplane and one race wing. I chose the airplane to start with. I have to buy a new Radio though. 6 channels to the radio. But the Race Wings flies really fast. They have videos out on Race Wings. So far I’ve found none that I can follow because it looks to unstable. Trial and error, but still too **** dangerous yet when you throw the Race Wing.

One last thing, I want to paint my airplanes. But what kind of paints do you use? From the craft store all of them are water color, so I guess okay. But does it look okay? Using a vinyl covering will add too much weight to the airplane and maybe more expensive.

Sorry. This is my second run at blogging at this Flite test forum. I’m into electronics and other stuffs. I’ve been at this twice. One at 17, one at 30 years after high school, and just started again. 0-2 on flights, still a go because I know more knowledge now. For me it will be 1-3 batting average on flights. Hopefully.

 

[Captain Mouser]

Can you add some context to your post?
There’s a lot more to batteries than mah.
All the electronics work together in concert, what video are you referring to?

By Kendin Yap. It’s on the internet. Type in Kendin Yap’s RC model airplane video. I think that’s a logo from Japan which is where the video is from, i think. A little over 2 ft wing span 65 cm, and also a little over 2 ft in length, 61 cm. It should come in at under 2 ibs. Trainer/sports model airplane for the beginner model. They sell it buy the kit, but I copied his videos.

He has about 10 airplane models or more on the internet out on videos. About 18 minutes in length videos. YouTube.

It’s a nice airplane and he makes things look easy. But he gives specifics on ESC, Motor to use, battery LIPO, 40 mm foam wheels, pushrods used 1.2, 1.5 mm and landing gear is I think 2 mm. So the trailing end is the elevator end, two wheels under the wing area at the center of gravity.

I’ve got to ask people here, when you guys fly your airplanes, do you wear shorts and look smart with eye glasses or do you look like a hobby goer, adventuresome and athletic? Do you dress the part as looking smart? Not important? I’m curious too.

 

[bisco]

By Kendin Yap. It’s on the internet. Type in Kendin Yap’s RC model airplane video. I think that’s a logo from Japan which is where the video is from, i think. A little over 2 ft wing span 65 cm, and also a little over 2 ft in length, 61 cm. It should come in at under 2 ibs. Trainer/sports model airplane for the beginner model. They sell it buy the kit, but I copied his videos.

He has about 10 airplane models or more on the internet out on videos. About 18 minutes in length videos. YouTube.

It’s a nice airplane and he makes things look easy. But he gives specifics on ESC, Motor to use, battery LIPO, 40 mm foam wheels, pushrods used 1.2, 1.5 mm and landing gear is I think 2 mm. So the trailing end is the elevator end, two wheels under the wing area at the center of gravity.

I’ve got to ask people here, when you guys fly your airplanes, do you wear shorts and look smart with eye glasses or do you look like a hobby goer, adventuresome and athletic? Do you dress the part as looking smart? Not important? I’m curious too.

This isn’t a blog. Look for a thread your question applies to, or start a new one if you can’t find anything pertinent

 

[Merv]

...They just go on watt factor then? 300 watts is the watt factor for a 2 ibs airplane....

Watt factor for batteries no, for motors yes.

To pick your motor, watts per pound is a good rule of thumb. 80 watts per pound is a minimum, 200 watts per pound will give you unlimited vertical. After you pick a motor the mfg will suggest a voltage and amperage. Pick a battery that can supply a few more amps at the voltage the motor is looking for.

All of my planes are well under 2 pounds, they are 20-26 ozs.

 

[Houndpup Rc]

Also, anybody have comments on Race Wings? They look pretty scary at launch? Dangerous. I was checking out videos and they can turn back to you. I made two models, one airplane and one race wing. I chose the airplane to start with. I have to buy a new Radio though. 6 channels to the radio. But the Race Wings flies really fast. They have videos out on Race Wings. So far I’ve found none that I can follow because it looks to unstable. Trial and error, but still too **** dangerous yet when you throw the Race Wing.

Yeah, race wings can be tricky to launch, but I have never had one flip back at me!...The only time you would ever get that would be because it was wayy to tail heavy so it would flip backward on lunch, but as long as you build it right, that won't happen👍 Usually light weight mid sized race wings are easy to launch, it just gets hard when they are super heavy or have a lot of torque roll do to way to big a motor! (Ask me how I know!😆😆)

One last thing, I want to paint my airplanes. But what kind of paints do you use? From the craft store all of them are water color, so I guess okay. But does it look okay? Using a vinyl covering will add too much weight to the airplane and maybe more expensive.

I just use Rust-Oleum spray paint from Ace Hardware👍 Be aware if you are doing Dollar tree foamboard planes that they can soak up the paint and end up with the paper peeling off, so if you don't want to deal with that, just apply a couple coats of brush on Minwax as that will act as a barrier between the paper and the foam and make your plane water resistant to boot!😁

And my airplane calls for 5,640 mah

That sounds wayy to big for that size of a plane! It proably going to be right around a 3cell 1,000 mah lipo👍

 

[Bricks]

First plane would not worry so much about paint as it adds weight and usually the first plane does not stay around long. Maybe some color for orientation and that is about it. Colored tape is cheap and easy, don`t think I have ever painted a FT type plane use tape solely..