ZMR better arms and other upgrades

[Kendrick57]

Hi
I am taking preorders for replacement arms for the ZMR250 miniquad.
These are not just re drilled blackouts though they do have the same strength.
I tracked down a UK supplier of carbon that would make the same type of carbon that blackout uses.

Since first posting this message a lot of things have happened, I have found 3 alternative types of carbon all at more reasonable prices, there is also a new player on the block so to speak who's prices for quality I cannot match and will not try if you want to go with their arm you are welcome to do so.

I now have 3 different ranges economy, standard, and premium. the premium are the arms I was going to sell originally that of the same strength as the blackout arms.
all of the arms will be of the same shape with protection around the biggest motor I believe the sunnysky with a 27mm can, they will have the same keyhole motor mounts and will come in lengths sutable for a 5, 6,7 inch propeller. 

Kendrick

[Kendrick57]

For future messages

[Kendrick57]

Replacement arms for the ZMR

I have finalised the types of replacement arms I am going to make, my first thought was for arms as strong as blackouts arms but from all the feedback only offering this would be short sighted. With this in mind I now have a list of different arms to upgrade the ZMR with. All of the arms I sell are based on the same shape with universal keyhole motor mounts, there are 2 mm of clearance between the edge of the motor plate and the largest motor can I have found so far a sunnysky. they will come in different lengths to fit different size props, from the 5 inch up to the 7 inch with the 6 inch having the same motor position as the original arms.

Economy range
The economy range of arms are made from pure carbon fibre with every layer woven, it is glossy on one side and matt or rough on the other, what it looses in looks it makes up for in price.   

Economy 3 arms:£2.40 per arm
Economy 5 arms:£4.30 per arm
Standard range
The standard range comes in 3mm only at the moment glossy on both sides and a inside the carbon is of a higher quality than that of the economy range. hence the higher cost. The quality is the same as the thug 3mm arms, I cannot match their price and frankly I don't know how they can sell at the price they do!

Standard 3 arm:£6.60 per arm
Ultimate range
the ultimate range are going to be the type I first thought of, replacement arms for the ZMR 250 with the strength of a blackouts made to fit the zmr.
These are not blackout arms drilled to take the ZMR mounting holes, neither are they cheep carbon cut to a better shape than the originals. They are custom made for the ZMR in cad and Cnc routed  out of aerospace carbon similar to blackouts.
there is only a limited amount of this carbon available, there will be more later in the year when the manufacturer adds this type of carbon to their range.

Ultimate 3:£T.B.A
I am taking orders at the moment first shipment will be mid March.
The arms have been designed by me and cut by me this does allow for more flexibility in the orders.

UK shipping £1.50
Shipping to the US  £5. world wide orders £5.25
The shipping price will stay the same except on large orders

Please state which size you want, how many and the country you are in so I can work out total price inc shipping.

everyone who has expressed an interest will receive a PM in the next few days if you don't get one then PM me and I will get back to you.


The first arms are now cut I am now ready to take orders
Number of arms left
Economy 3 :  64
Economy 5 :   42
Standard 3 :    38
Ultimate      : TBA


Kendrick

[Kendrick57]

Here are a range of pictures and other information.

WEIGHT
original china arm 12.6g
economy 3
5 inch 11.1g
6 inch 12.6g
7 inch 13.5g
economy 5
5 inch 18.7g
6 inch 21.2g
7 inch 23.1g

Kendrick

[CurryKitten]

I just saw these on Bruces channel.  What's the price ?

[Ratty]

Any pics too?

When you can buy a whole frame for £20 I cant see paying much for arms.

[Loopdreams]

Make some little things for tilting the motors ten degrees on the ZMR frame.  You'll sell loads.

[Ratty]

The 3d printed files for that already exist, but some that are built into the arms could be good.

[Loopdreams]

Yeah but a 3D printed file is no good to me, I just want somewhere to buy them all ready to go.

[Heliotrope]

As someone said, they would have to be cheap when a frame is only about £20.

Just a thought, these 250s are popular and quite nice BUT the arms are very thick (4.1 mm) and add weight. If you made thinner/lighter arms you would be offering something with a benefit over the standard ones. Don't suppose your proposed arms would fit this particular quad.

www.ebay.co.uk/itm/CopterX-QAV-250-Mini-FPV-Racing-Drone-Quadcopter-Kit-Frame-Carbon-Fiber-UK-Ship-/381106813150?pt=UK_ToysGames_RadioControlled_JN&hash=item58bbbc78de

[Kendrick57]

I just saw these on Bruces channel.  What's the price ?

I'll add the prices to the first post.

Ratty pics will be coming soon, I can't take physical pic's yet as I have not yet received the carbon. The early picks will be comparing other arms with a full size printout.
Don't think of it as you only paid £20 for the frame why pay £28+shipping for just a set of arms. Think of it more in terms of I bought a cheap frame put upto £200 on it in the motors, ESC, flight controller, reciver,fpv gear, mobius and batteries I've flown it a few months but now I want to do more push the envelope BUT I've seen all this stuff about arm brakinor becoming able to twist, or you may find this is happening with your own. Replacement arms can be got from China for £7 a pair not much of an outlay, think about it for the shipping over the cost of 8 chineese arms that have a limited lifetime if you fly rough against 4 of my arms that will last a lifetime.

Loop I don't want to go down the route of motors at an angle or cameras at an angle I'm trying to design a tilt mount for both cameras with a servo to keep the view horizontal regardless of quad angle.

Heliotrope that 250 and the ZMR are very diferent it's a more expensive entry level 250 definitely better made, the arms still have some flaws in my opinion the motor plate is too small one of the close ups is of an emax on the arm, the edge of the motor plate is the same size as the motor not a good thing in many of the guys opinion. There are also too many motor mounting holes that is always a weak spot only 4 are required spend a bit of time to work out the best shape to do the job I did.
Kendrick

[Loopdreams]

Loop I don't want to go down the route of motors at an angle or cameras at an angle I'm trying to design a tilt mount for both cameras with a servo to keep the view horizontal regardless of quad angle.

It would be horrible flying like that, possibly ok if you were in self-level mode but in rate mode it would be hopeless.

[CurryKitten]

I tried it in a 450 sized frame where i was trying to go fast and low using a kk2 board with the servo based camera tilt.  It was a nightmare, I just couldn't get a read on my altitude and forward speed at all.  As a manual control it's ok, but moving around as you go is very difficult.  To be fair though, I found flying through a 2 axis gimbal tricky to start with, only takes a few flight to get used to, but then again I'm not doing rolls and things with that.

[Ratty]

Its not £28 + shipping tho, its £22 delivered. That's a whole replacement frame, top and bottom plates and 4 arms with all hardware, made of solid CF. If you manage to snap arms regularly id be very surprised.

I flew at full speed into a cross bar of a goal the other day, it only put a small dent in my zmr frame.

[Kendrick57]

the camera tilt is in its early stages theoretical and cad only.

ratty as for your tangle with a cross bar of a goal at full speed it depends what hits the bar. I am going to say the line Bruce whenever he complains about problems with the arms of the ZMR I KNOW I'm going to get lots of comments from people that have run into loads of objects at speed and their arms are still ok, I can see you are one of those people.
a thing to think about would you fly your ZMR the crazy way the guys with blackouts fly their quads.
Kendrick