EF 48" Laser EXP

[njswede]

The Firepower looks like a nice motor but I see a couple of potential issues.. First the cross mount looks like it may be larger diameter than the holes in the Laser mounting plate, and there is no room to re-drill and I don't think you would get the screws in if you went with a smaller cross mount (I could be wrong on this but it looks that way). Second 1000kv is a bit high if you are running 4s, it would mean a 10" prop which is not ideal for 3D. On 3s power would be a bit weak.

Are we looking at the same motor? I see 900kv and 630W on an 11x5.5. But the mounting holes may be a showstopper.

 

[njswede]

I think I may even get away with a 12x5 Xoar on that motor.

 

[njswede]

Just checked with HeadsUp and the hole spacing is 50mm, which I think will be way too much. Looks like too much trouble. Also the kv is a bit high even at 900... I think it's down to one of these:

Torque 2814/820 - The recommended motor, but only rated for 550W. Daddy wants too much power! (And where's the adventure in going for the recommended setup? )
Omega 130g - I really like this one (at least on paper). Light and rated for 700W. It's the recommended choice for 3DHS planes in the 47-48" class. $59 is not too bad a price, either.
Motrolfly 2820/750 - I like the low kv and the fact that it's rated for 800W on a 4s. A bit expensive, but not as expensive at the Torque.

Any wisdom you folks like to share about those alternatives?

 

[SnowDog]

Just checked with HeadsUp and the hole spacing is 50mm, which I think will be way too much. Looks like too much trouble. Also the kv is a bit high even at 900... I think it's down to one of these:

Torque 2814/820 - The recommended motor, but only rated for 550W. Daddy wants too much power! (And where's the adventure in going for the recommended setup? )
Omega 130g - I really like this one (at least on paper). Light and rated for 700W. It's the recommended choice for 3DHS planes in the 47-48" class. $59 is not too bad a price, either.
Motrolfly 2820/750 - I like the low kv and the fact that it's rated for 800W on a 4s. A bit expensive, but not as expensive at the Torque.

Any wisdom you folks like to share about those alternatives?

Go with the Motrofly...you will really like that motor! I've got a 4315, a 3615, a 2815, and a 2820. They are awesome.
You might try posting a "wanted" ad in the classifieds to see if anyone has one on the shelf they'd like to sell...

 

[Steve_B]

I've got no hesitation in recommending the Motrolfly. The Torque is also a fine motor and is in no way lacking power but cant quite compete with the punch of the Motrolfly spinning a larger prop. I'm currently running a 13x7 Xoar on my DM-2820 750kv which gives excellent performance without overstressing the motor structurally, which can be the case if you use a 14" prop and fly very hard. The DM-3615 is also worth considering and copes with a 14" prop no problem, though I think the slight extra weight would make the Laser nose heavy, it's fine in the 48" Edge though.

If you go with the Motrolfly DM-2820 get at the least a 60A ESC..

 

[gyro]

Gents, just in case you want to get real technical on the motor stuff, we have a powersystems discussion area, and I just made a thread for talking about Extreme Flight aircraft there: http://www.3drcforums.com/showthrea...-EXP-power-systems-discussion&p=2475#post2475

 

[3dRCparts.com]

Ken now carries the 2820-685, perfect for this with a 14x7 prop and 4s

 

[shadow102]

What is everyone running for elevator servos in this plane? i have 4 hs5065's left over from the 48" extra and planned to use them on this, or is it like the MXS where it is better to run an HS85 on the elevator?

 

[gyro]

I had a 5085mg on mine

 

[Steve_B]

Savox SH-0255 on the elevator of my Laser, no shortage of torque and pretty fast too, plus they fit the hole.