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Search: Posts Made By: dereckbc
Forum: Beginners 07-24-2016, 11:50 PM
Replies: 10
Views: 2,548
Posted By dereckbc
What about a rack, side bags, or trailer? ...

What about a rack, side bags, or trailer?

Going to get a bad case of Hanger Rash in a backpack.
Forum: General Electric Discussions 06-28-2016, 01:26 AM
Replies: 11
Views: 511
Posted By dereckbc
IMO yes. A Static reading is always going to be...

IMO yes. A Static reading is always going to be higher than actual in flight. Second point you should not be flying full throttle except maybe at takeoff. Just be sure you understand the difference...
Forum: ParkFlyers 06-27-2016, 03:51 AM
Replies: 22
Views: 532
Posted By dereckbc
That is what you need to know. Because a lot of...

That is what you need to know. Because a lot of 3D planes also make good Sports plane. You just limit the throws. The best thing about a 3D plane used for aerobatics is you have all that extra power...
Forum: General Electric Discussions 06-27-2016, 03:45 AM
Replies: 11
Views: 511
Posted By dereckbc
Fresh but keep in mind that it is a Static Test,...

Fresh but keep in mind that it is a Static Test, which means it will be drawing more current than when in flight. With you holding the plane, the propeller will be under a lot more load than when in...
Forum: General Electric Discussions 06-19-2016, 11:08 PM
Replies: 18
Views: 306
Posted By dereckbc
To hot? Where the heck do you live? Alaska? Here...

To hot? Where the heck do you live? Alaska? Here in TX we do not take our sweaters off until it gets to 90.

No flying in my family on Fathers Day. A round of golf with my Son in the morning in 90...
Forum: Batteries & Chargers 06-19-2016, 05:08 PM
Replies: 16
Views: 361
Posted By dereckbc
Leaving them charged over night to fly the next...

Leaving them charged over night to fly the next day is not a real big problem.

Charging LiPo's or any lithium battery to 100% is problematic, and compounded if charged to 100% every time. It...
Forum: Batteries & Chargers 06-19-2016, 04:24 AM
Replies: 16
Views: 361
Posted By dereckbc
Fist post? Try 755 post. You can find a ton...

Fist post? Try 755 post.

You can find a ton of websites that support what I said. Been working with batteries professionally since 1979. But here are a couple of links.

Battery University...
Forum: Batteries & Chargers 06-19-2016, 02:57 AM
Replies: 16
Views: 361
Posted By dereckbc
Factoid. You should never fully charge any...

Factoid.

You should never fully charge any lithium battery, and when charged discharge immediately and no deeper than 90% DOD or less.

Set your charger to 4.10 to 4.15 vpc, and your ESC LVD...
Forum: General Electric Discussions 06-19-2016, 12:46 AM
Replies: 18
Views: 642
Posted By dereckbc
Sorry for the late response, just seen this. ...

Sorry for the late response, just seen this.

Simple answer is DR and Expo in the TX will be on top of what is in the RX. Using an extreme example if you set the TX to 50%, and the RX to 50% you...
Forum: Aerial Photography 06-17-2016, 04:21 AM
Replies: 2
Views: 311
Posted By dereckbc
Not only did Dad take your hand and taught you to...

Not only did Dad take your hand and taught you to fly, He also taught you how to write your name in snow.
Forum: General Electric Discussions 06-16-2016, 08:56 PM
Replies: 27
Views: 669
Posted By dereckbc
It is a skill every pilot needs. For one you need...

It is a skill every pilot needs. For one you need to Invert to check CG. If correct the plane should only need a little Down Elevator to hold the nose up. Just get some altitude and practice.
...
Forum: General Electric Discussions 06-16-2016, 08:23 PM
Replies: 14
Views: 469
Posted By dereckbc
That escaped me, but that is better done dumped...

That escaped me, but that is better done dumped into a Resistor or Battery as the BEC cannot adsorb all the power.

ON Ev's they use Super Capacitors because the battery cannot absorb that much...
Forum: General Electric Discussions 06-16-2016, 03:58 PM
Replies: 14
Views: 469
Posted By dereckbc
I cannot tell you if RC ESC have it built in or...

I cannot tell you if RC ESC have it built in or not, but yes it is possible. Speed controllers for both AC and DC motors can be designed and built with Regen. Just about every golf cart and EV built...
Forum: General Electric Discussions 06-16-2016, 04:23 AM
Replies: 14
Views: 469
Posted By dereckbc
God + Velcro + Battery = Miracle

OK now that I got your attention, read on.

If you have not heard we have had a lot of rain in Texas. I am in north TX and we have not had the rains like south and central TX, just 16 inches in 2...
Forum: General Electric Discussions 06-15-2016, 03:16 PM
Replies: 45
Views: 945
Posted By dereckbc
Yeah I know, who gives a crap what happens to the...

Yeah I know, who gives a crap what happens to the guy down the street. He was an idiot.
Forum: General Electric Discussions 06-15-2016, 03:12 PM
Replies: 7
Views: 249
Posted By dereckbc
OK that is your answer. If you have a 50 watt...

OK that is your answer. If you have a 50 watt port tells you what amperage to expect.

1S 3.7 volts = 13.5 amps
2S 7.4 volts = 6.7 amps
3S 11.1 volts = 4.5 amps
4S 14.8 volts = 3.3 amps
Forum: General Electric Discussions 06-14-2016, 10:22 PM
Replies: 45
Views: 945
Posted By dereckbc
Well if you are talking about charging, they...

Well if you are talking about charging, they should never get above room temps. If they feel warm to touch while charging, you got a big problem. They should always feel cool to the touch while...
Forum: General Electric Discussions 06-14-2016, 04:29 AM
Replies: 45
Views: 945
Posted By dereckbc
False statement. 1 C charge rates is extremely...

False statement. 1 C charge rates is extremely high charge rate and the normal recommended charge rate. It is the charge rate that causes them to fail.

EV manufactures do not even charge that fast...
Forum: General Electric Discussions 06-14-2016, 04:19 AM
Replies: 45
Views: 945
Posted By dereckbc
That is not enough and only half the equation....

That is not enough and only half the equation. More importantly is Temperature.
Forum: General Electric Discussions 06-13-2016, 05:32 PM
Replies: 45
Views: 945
Posted By dereckbc
That is the problem. They are extremely dangerous...

That is the problem. They are extremely dangerous and unstable.

Do you have to stand over your Cell Phone, Lap Top, Flash Light, or EV when you charge it?

Why not?
Forum: General Electric Discussions 06-07-2016, 06:34 PM
Replies: 27
Views: 931
Posted By dereckbc
Battery Capacity Watt Hours = Nominal Battery...

Battery Capacity Watt Hours = Nominal Battery Voltage x Amp Hours

3S 11.1 volts x 2.2 AH = 24.4 Watt Hours

4S 14.8 volts x 2.2 AH = 32.56 Watt Hours

You should get more fly time if you run...
Forum: Batteries & Chargers 06-06-2016, 10:30 PM
Replies: 18
Views: 4,064
Posted By dereckbc
Might check your links, because none of them lead...

Might check your links, because none of them lead you to A123 batteries.
Forum: Beginners 06-06-2016, 03:32 PM
Replies: 11
Views: 422
Posted By dereckbc
Some planes use a Switch, others not.

Some planes use a Switch, others not.
Forum: 3D Flying 06-06-2016, 04:14 AM
Replies: 11
Views: 731
Posted By dereckbc
Pizzano, you are correct, there is little info on...

Pizzano, you are correct, there is little info on the net about using flaperons and spoilerons on 3D planes.

I have 2 3D planes. One is a Precision Aerobatic Addiction X, and a Twisted Hobbies...
Forum: General Electric Discussions 05-31-2016, 01:02 AM
Replies: 23
Views: 622
Posted By dereckbc
One thing to keep in mind if the plane is not...

One thing to keep in mind if the plane is not designed to use Flaps or Flaperons, expect strange behavior, some not good at all.

Flaps are to do two things, Add drag and lift and used to slow...
Forum: General Electric Discussions 05-30-2016, 01:32 AM
Replies: 12
Views: 285
Posted By dereckbc
There are several ways to skin this cat. Some are...

There are several ways to skin this cat. Some are better than others, and others are just plain stupid and dangerous. There are two good ways to do this, but require some planning and knowledge.
...
Forum: General Electric Discussions 05-30-2016, 12:47 AM
Replies: 23
Views: 622
Posted By dereckbc
First place to start is REDUCE the throw. 40% is...

First place to start is REDUCE the throw. 40% is way to much. It is also best to put flaps on a 3-way Switch. Sp position 0 is No Flaps, #2 5 %, and #3 say 10%. You also need to put some time-delay...
Forum: Batteries & Chargers 05-27-2016, 04:41 AM
Replies: 29
Views: 688
Posted By dereckbc
Some lithium Ion batteries are dangerous. Lithium...

Some lithium Ion batteries are dangerous. Lithium Cobalt are the types that give Lithium batteries bad PR as results of fires on airplanes and homes.

The LiPo's we RC people use are the most...
Forum: Batteries & Chargers 05-27-2016, 12:47 AM
Replies: 29
Views: 688
Posted By dereckbc
Very understandable as they are extremely...

Very understandable as they are extremely dangerous and unstable, more so than Lithium Cobalt.
Forum: Power Systems 05-26-2016, 03:49 PM
Replies: 15
Views: 395
Posted By dereckbc
True dat, the ESC is the weakest link between the...

True dat, the ESC is the weakest link between the two and will go first.

If weight and budget are of no concern, one can just over size the ESC by a factor or two or more. But for most of us, we...
Showing results 1 to 30 of 500

 
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