Multirotor, multicopter and quadcopter discussion - The Drone thread

so I have finally given up on the qav250, managed to snap another bottom plate on a goalpost. I picked up a emax knighthawk frame form a local supplier while I wait for a zmr and thug arms to arrive from tentech which I may add is taking an age to arrive.

I can appreciate the quality of the QAV, the emax is horrible, the zmr apparently is cut by tentech or thug themselves out of pure carbon so should be nicer and I have 4 extra thug arms coming which I am going to double up so I have 6mm arms. All I need to do is try and get one of the overcraft or nucleus pdb's for it but everywhere is out of stock :(.

While the qav is a quality frame the carbon just doesn't seem to hold its structure enough, delamination and flex works it's way in and the fact you can not replace the arms just makes it not a good choice. I wouldn't care but I just got some emax 1900kv to spin 6x45 props and the thing was flying lovely.

Given I have enough to build 2 full quads now I will be replacing the emax frame as soon as I can and think I am going to be ordering a blackout, the cost of a ZMR frame, better arms and a pdb just gets so close to the cost of a blackout you might as well buy a blackout. Also the carbon on the blackout frame is supposed to be of the highest quality as opposed to rumors that lately the carbon on th QAV has slowly gotten less and less.

Sad few days. on the bright side, it is raining so I am not missing much I suppose!

Good news though, I bench tested the 1900kv on 4s with 6x45 props and got 900+g of thrust. they have bundles of torque and are more efficient than the 2300kv producing more thrust
 
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Kanifee said:
so I have finally given up on the qav250, managed to snap another bottom plate on a goalpost. I picked up a emax knighthawk frame form a local supplier while I wait for a zmr and thug arms to arrive from tentech which I may add is taking an age to arrive.

I can appreciate the quality of the QAV, the emax is horrible, the zmr apparently is cut by tentech or thug themselves out of pure carbon so should be nicer and I have 4 extra thug arms coming which I am going to double up so I have 6mm arms. All I need to do is try and get one of the overcraft or nucleus pdb's for it but everywhere is out of stock :(.

While the qav is a quality frame the carbon just doesn't seem to hold its structure enough, delamination and flex works it's way in and the fact you can not replace the arms just makes it not a good choice. I wouldn't care but I just got some emax 1900kv to spin 6x45 props and the thing was flying lovely.

Given I have enough to build 2 full quads now I will be replacing the emax frame as soon as I can and think I am going to be ordering a blackout, the cost of a ZMR frame, better arms and a pdb just gets so close to the cost of a blackout you might as well buy a blackout. Also the carbon on the blackout frame is supposed to be of the highest quality as opposed to rumors that lately the carbon on th QAV has slowly gotten less and less.

Sad few days. on the bright side, it is raining so I am not missing much I suppose!

Good news though, I bench tested the 1900kv on 4s with 6x45 props and got 900+g of thrust. they have bundles of torque and are more efficient than the 2300kv producing more thrust
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I hope your Thug arms arrive in better condition than some of the ones I seen on RC Groups that look like they have been cut by a beaver.

Nucleus board is really worth it when you can get one, can cut down on so many wires. I never bothered with the minim in the end as the warnings go through the Taranis anyway.
 
well great news, my package just arrived, they all seem fine quality wise but I have one glaring issue...... only 4 arms instead of the extra 4 I ordered :mad:

I emailed them yesterday regarding the slow post and I am quite annoyed I paid for tracked signed for mail and got a parcel shoved through the door with no knock. Will be phoning tentech Monday morning as I can guess I wont be getting a reply form the email I just sent. I will open a paypal dispute if I get no joy.

Bloody annoying when I just want to fly!
 
Outch, sorry to hear this :( hope you get stuff sorted and get out flying again, would deffo complain about that shipment and the cockup.

No flying for me today, bit damp, I only have a few props left, need to order some more.

Im building some more of my bixler today in the weather downturn

Hopefully the sun is back out so I can have an after work mid week flight some time in the week.



How hard did you hit the goalposts? must have been quite hard, I hit some rugby posts but only broke a few props.
 
Sun glare, there are three sets of goals quite close and a upright pole about 25 feet away. I was practicing some over and under speed runs with the upright as the turn back, on the return the glare blinded me.

To be honest the qav looks the part with it's matte carbon and the plate is thicker so gives it a sturdy feel but impact just separate's all the layers and rips it apart, I just don't think the carbon is strong enough that they use. Decent carbon and the design would be perfect but I guess they can't keep up with demand or profit margins are not great enough if they use that.

nice to hear about the bixler, I have all the parts to scratch a mini plane, I just do not have the time at the moment.
 
Sun glare can be a killer

Damn, sounds bad. Yeh seen the way the carbon just splits all the layers on that one. Shame really. Hopefully the next is better.

Yeh bixler2 is slowly coming on, check alout the rc planes thread for updates.
 
So i got the tentech thug armed zmr built and took it for a fly, it flys great it looks the part and im getting flight times i expected finaly but that isnt the full story.

To compound the issues i have had so far with this company i shall say that i am disappointed with the quality of the machining, on the face of it it looks great, clean edges and so forth but the fit is terrible, the holes on 2 of the arms are off enough to twist the frame if unchecked, the holes for the shaft of the motor is barely big enough for them to fit in, so much so i think it has done one of my bearings putting the motor on, the m3 screws have to be screwed in to the hole for them to pass through and the spacers for the bottom plates are made of cheese.... seriously, i think i could stick them on some toast add some Worcestershire sauce and have lunch with them. Tightening down the bolts that hold the arms in place, you know, the ones that need to be tight and rigid to give the flailing extensions that take all the brunt of impacts the rigid strength they need to survive and not tear the frame apart just squashes the spacers and deforms the frame and throws off the whole geometry.

Not impressed, i have done some work to fix it all but it shouldn't be needed for a frame they say has been cut in house!
 
Carbon zmr 250. I bought mine from makeitbuildit and apart from the 3 arms I've broken over a year and the numerous rubber bobbins lost from the mobius platform, it's been champion. Ok, there are fancier, lighter, better designed frames out there but for the £25 I paid for it, I can't fault it!

Currently waiting for pay day now as it looks like when I broke the arm last, I also managed to detach a motor wire. Still, it has given me the motivation to fly my mini hex a bit more and I think I'm starting to prefer it!
 
I wouldnt really want to chuck £100+ 250 frames around.

I am due a free £125 reward soon for switching bank accounts, im kind of tempted to do a 300 build, however im not sure if iv got too many already now with the foam airframe.


Also, just wanted to ask a generic question, with these 250 frames, would there be any benifit at all by doing a carbon tape or crossweave tape wrap on the frame parts before its put together?
 
Its a zmr, it's just cut by thug I think. I will be buying a blackout when stock hits, good carbon, light frame, replaceable arms.
 
mingeroonie said:
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Where did you buy that lot from? seperatly or bought it off someone?

No worries, we all have questions :)


Just ordered 16 gemfan props for the 250.

4 sets of 4.


Speaking of props, are prices of props likely to come down in the future as more are made, or more companies make them? there not massivly expensive, but I would like to see the price per prop come down.

So maybe I can order 16 for £6 rather than £10 say
 
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Skeeter said:
Crash less instead :p
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Iv not actually done that bad :) I am getting better at flying near or through obsticales, its just when I have stupid moments.

Iv had a few trips out where I have come back with the same 4 props I set out on.

Was just wondering, if they were costing less I would probably buy more of them


The 450 is irrelevant as iv had pretty much the same props on for months and months

unless you crash by falling out the air, or it topples over on concrete on landing its not going to break.
 
Skeeter said:
Crash less instead :p
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You aint flying hard or fast enough if this was to be.

Took the quad out and stuck 4 1300 3s batterys through it. I am pleasantly surprised by the 3s on 6x45 props, it handles well and still has reasonable punch, obviously it is nowhere near the punch 4s gives you but it is adequate.

DJ I spend £40 a time on props, that's usualy enough for 3 weeks or so I would say, that's if I get to fly everyday. Haven't been able to fly as much lately for whatever reason at the time, though I want to get lots of hours in over the next few weeks. My mobius is playing up now too, the damn thing just switches on, blinks ones then stays off. Debating weather to get one of those yi sports cameras or just another Mobius
 
Kanifee said:
You aint flying hard or fast enough if this was to be.

Took the quad out and stuck 4 1300 3s batterys through it. I am pleasantly surprised by the 3s on 6x45 props, it handles well and still has reasonable punch, obviously it is nowhere near the punch 4s gives you but it is adequate.

DJ I spend £40 a time on props, that's usualy enough for 3 weeks or so I would say, that's if I get to fly everyday. Haven't been able to fly as much lately for whatever reason at the time, though I want to get lots of hours in over the next few weeks. My mobius is playing up now too, the damn thing just switches on, blinks ones then stays off. Debating weather to get one of those yi sports cameras or just another Mobius
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You said that last time :p

I am getting more confident now which means faster and harder flying, although I still cannot really fly in rate mode. Still suck at the controls near enough when turning. So I am trying to practise as much as possible in rate mode, and have my fun in horizon mode for now.

Like I said props are not an issue, I still have a full set of chipped gemfans, plus 3 spare in the bag but they are only one rotation.

I came back plenty of times without breaking any, but I also came home with breaking some.

I wouldnt really want to go through £40's worth of props for 3 weeks, maybe you fly more than me :p if I know I am going for a good session though I will stock up.

Anyway, another 4 sets coming in the week.

Whats wrong with the mobius? dont you know? fully charged and plenty of space on the card I assume?

What 4s battery was you using? I use 3s 1300mah
 
I have no idea what is wrong with the Mobius, maybe it just took one too many hits, I have had it in bits checking over everything but I can't seem to make any headway on it.

Im using a 2200mah 65c battery at the moment while I wait on my back order of 4 1800mah 65c 4s battery's from hobbyking, they are taking their sweet time though.
 
Kanifee said:
I have no idea what is wrong with the Mobius, maybe it just took one too many hits, I have had it in bits checking over everything but I can't seem to make any headway on it.

Im using a 2200mah 65c battery at the moment while I wait on my back order of 4 1800mah 65c 4s battery's from hobbyking, they are taking their sweet time though.
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They any good on the 250? (the 2200mah) reccomended for general use/general 5030 props?

Reason I ask is I need to order some 2200mah 4S batteries for another model of mine, so wondering if it were of any use on the 250 if I needed them

I have 3 batteries for the 250 so not short really
 
On 5030's na, 5040's wouldn't realy do it either, my motors on 4s 6045 put out static thrust around 900g a corner, 5030's are around 400 to 450 so the quad will be sluggish and heavy.

remember, 4s you need to make sure your esc can handle the extra voltage, also that your vtx can accept it too, if your camera isn't running form voltage output of your vtx that needs to be considered also.
 
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