Kurt P

Since I have no experience with brush-less motors, I would like to have some advise.
What do you think which motor I should use best for my mini Laser 3D. I was thinking about the hacker B20 -15L (with gearbox) or the plettenberg freestyle 20 (without gearbox).
Or is there another (cheaper) solution?

Henke Torphammar

Kurt,


You picked two of the best motors for this plane! A gerd motor is to prefer for high performance planes.

There are also Razor motors, you can get them with the same Maxon gearbox as the Hacker, and I hear they are good too...but I have no experience from them.


I´ve flown a B20 15L 8x500AR L3D, it was on the heavy side, the "3D" pard were not there so I think a li-po battery would be a good choice. Etec 1200 3s2p and a B20 15L 4:1 swinging a 10x4,7 would be my choice.

hope this helps

Kurt P

thank you very much for the input, this helps me a lot.

3DFanatic

My Feedback: (5)

Happen to have the .46 size Laser? I'm interested as to how the two compare in flight performance. I was thinking about getting the electric version but haven't gotten around to it.

goinav8n

My Feedback: (16)

I have the Mini Laser 3D that I fly with a 10 cell Kan 950 pack B-20 18l 4:1 gearbox. The preformance is outstanding and makes the gas guys gasp for air when it is launched. I can hold it straight up at full power and release it and its like a rocket. Better than 1:1 thrust. It is heavy and would do better on Li-polys but my budget just doent cut it right now.

I have had good luck with the Hacker and the 15L should preform a little better than the 18L

Jeff

briankenney91

My Feedback: (1)

I just got one of the mini lasers and I was wondering how did this thing perform with the stock motor hovering wise. Oh and is there any modifications that need to be done.

goinav8n

My Feedback: (16)

The performance was not real good with the stock setup. Looed only with a dive. It wouldnt hover at all. For mods use some lite ply around the landing gear as it needs some help
http://www.scalesoaring.com/minilaser/index.htm

This link I think shows it

Jeff

briankenney91

My Feedback: (1)

Thanks for the tips Jeff but I couldn't get the link to work. What motor and gearbox setup would you recommend on this.

goinav8n

My Feedback: (16)

I have the Hacker B-20 18L with the 4:1 in mine But the 15L and 12L work just fine. The preformance is outstanding with these combos. If you go to the parkflyer section @ www.ezonemag.com and do a search for the Mini Laser and Hacker you will be overwelmed with info. As far as Im concerned you cant go wrong with the hacker combo. If there is anymore I can do to help just let me know

[email protected]

Jeff

briankenney91

My Feedback: (1)

Thanks Jeff for the info. This is my first electric, I got it to play around with at the house when I can't fly my nitro planes. I will check out that website.

KatManDEW

My Feedback: (6)

I have the Hacker B20-15L in my Mini Laser, with lipoly batteries. Unlimited vertical and flight times of well over 20 minutes. The Razor 2500 would work just as well or better than the Hacker and is MUCH cheaper. As previously mentioned, there's a TON of info about the Mini Laser at [link=http://www.ezonemag.com]EZone[/link]

torquerolln

do you know what litium batteries i could use for my hacker b20 18l with 4:1 gearbox

goinav8n

My Feedback: (16)

I think the best packs going now are the Thunder Power 2100 seris. 3s2p. Very good duration and great power. This is what Ill be getting here in the next few weeks. Ne Sail and esprit along with countless others sell them. They are not cheap but are worth the investment

Jeff-

KatManDEW

My Feedback: (6)

torquerolln; For the Hacker B20-18L I would probably use 3S3P of the new Kokam super high discharge 340 mah cells. This setup would be much lighter than any other current lipoly setup for that motor, but it would also cost more. It would only have a total capacity of 1020 mah but it would be almost two ounces lighter than either a Thunder Power or E-Tech lipoly pack, which is in the neighborhood of 40% less weight (weight is very important). The reason for this is that the super high discharge Kokams can run at 20C, versus 5C to 8C for the Thunder Powers or the E-Tech's, so you don't need to "parallel up" as many cells to obtain enough current for your application. If you want more duration you can parallel up more Kokams or use Thunder Powers or E-Tec's.

The key to selecting lipoly batteries is to know how much current your motor/application will pull, and then select lipolys that will handle that amount of current. Depending on the gear ratio and prop, you could pull as much as 18 amps with the B20-18L.

The Thunder Powers and E-Tech's are great cells, and I use both, including Thunder Powers in a [link=http://www.katmandew.com/images/RC/Electric/Lexx%20-%20holding.jpg]61 inch Lexx[/link] and a [link=http://www.katmandew.com/images/RC/Funtana/fuse%20bones%20and%20covered%20wings%20%20top.jpg]78 inch Funtana[/link] But the new 20C capable Kokams are in a different league. I believe the the 20C Kokams are only available in the 340 mah size at the moment, but once Kokams, and other 20C lipolys are available, it's going to blow electric flight into a whole new realm.

torquerolln

thanks ill see if i can get some im running a 7 cell 1100 mah in my 3dheaven and it can hover and barely pull out. So i think the lithium will make a difference

Clayshobbies

My Feedback: (16)

I have used the Hacker B20-15L and the Himax 4.3:1 both with a TP3S 2100, very good setup. The Himax with a PHX-25 is a bit cheaper then the Hacker setup.

CM