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» 2019 Llanfair TH Village Fete
257CF & 237CF  Empty2019-07-12, 18:53 by Rich

» Proposals for Model aircraft flying ( CAA registration) April 2019
257CF & 237CF  Empty2019-05-08, 17:49 by Gary M Jones

» Police crash
257CF & 237CF  Empty2019-04-14, 15:36 by Roy

» Bit of indoors
257CF & 237CF  Empty2019-04-13, 16:49 by Roy

» For Sale
257CF & 237CF  Empty2019-03-03, 23:44 by Charles E Cornes

Saturday 7/7/18

2018-07-07, 21:07 by Gary M Jones

I was at the field today between 14:00 & 15:00 all on my own , good flying too. There is a dead sheep along the fence line towards the gate from the pits, I saw the farmer so reported this to her. I hope no one had plans for a BBQ Smile .

Farmer …

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257CF & 237CF

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Post by Andy Sayle on 2015-01-30, 08:36

Morning guys.

A bit of tinkering on the old CAD over the last week or so has resulted in this:

257CF & 237CF  251d10

Its a 257 sized quadcopter frame, specifically designed for the 18xx class motors, 12a ESCs and a 3s battery (around 1000mAh or so).  Only the small form factor flight controllers will fit (naze32, CC3d, KKmini etc)  There's also the option of some shorter arms to convert it to a 237 sized airframe.  Perfect for lifting a little FPV system, and using for racing etc.  Or, fly it line of sight where it is perfect for small fields/ back garden etc.

I've also designed a camera mounting plate, that can be rigid mounted, or isolation mounted.  The isolation mounts will take a bit of developing/testing to get the compound optimised for the best isolation characteristics.

As always, the frame parts are decent quality milled carbon fibre, and I'll be selling kits that include all the CF parts, stainless fixings, and maybe even a few special 3D printed options!

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Post by Rich on 2015-01-30, 08:57

It looks cool I like the idea of testing, as always Mark will do the crash testing Very Happy

I like the 3D printer

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Post by Mark Barnes on 2015-01-30, 09:39

Holes in the arms to feed the motors wires through is a good idea.

Looking forward to imbeding one in a car windscreen soon


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Post by Andy Sayle on 2015-01-30, 10:08

Mark Barnes wrote:Holes in the arms to feed the motors wires through is a good idea.

I know.  Genius idea, and only a proper tool would miss that out of the initial concept design!

Mark Barnes wrote:Looking forward to imbeding one in a car windscreen soon

I thought that was Gary's speciality?

Andy

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Post by Guest on 2015-01-31, 13:39

learned that one from watching mark fly it made me think it was ok to crash a lot
:-)


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Post by Peter Squire on 2015-02-01, 18:52

When are you having these made Andy?
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Post by Andy Sayle on 2015-02-02, 09:18

Hey Pete,

I've had the quote back from Carbon guy, and it is not insignificant! At present I'm looking at about £35 for just the carbon parts. Add in nuts and bolts, and it is looking like about £40 for the basic 2 plate kit, and about £50-55 for the 3 plate kit.

The carbon will be on a 2 week lead time, everything else much quicker. I've got to do a quick check to make sure I'm going to be able to sell all the kits and not end up too much out of pocket, but I'm aiming to order the carbon either today or tomorrow. If all goes to plan, you could have a kit for valentines day!

Andy

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Post by Andy Sayle on 2015-02-02, 12:59

Nope.  no electronics included, just airframe parts.  

And as for the ESCs, they are not dodgy.  Afro ESCs work perfectly well with my Jeti Gear, and Graupner radio gear.  It's just that poorly designed futaba and spektrum radio gear have humongous power requirements, and need a BEC the size of a small county to work properly.  Why futaba/spektrum can't design receivers that have a low power requirement like reputable manufacturers, I don't know!  Wink

Ha ha.

EDIT: The above was in response to a post previous to this one, that has been deleted by the poster. We have the evidence in the form of the Admin logs!

Back on topic now too.  How many people would be interested in this kit, if the price was £40?  That would include arms, 2 plates, spacers, nuts and bolts and a CF cam mount plate.

Andy

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Post by Andy Sayle on 2015-02-04, 13:54

The carbon has all been ordered Pete. Should be here end of next week-ish. All the hardware, bolts nuts has also been ordered. I'm just locating a supplier for some frame spacers that are stronger than 3d printed ones...

Andy

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Post by Peter Squire on 2015-02-04, 15:33

What motors and esc's would you recommend for this kit Andy?
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Post by Mark Barnes on 2015-02-04, 15:47

can i use full lipo voltage telemerty on these?

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Post by Andy Sayle on 2015-02-04, 16:45

Only if it is small and light enough!

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Post by Mark Barnes on 2015-02-04, 17:02

2.65grm, is that ok?

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Post by Andy Sayle on 2015-02-04, 17:10

too much sorry..

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Post by Rich on 2015-02-04, 18:58

I can't find the log files where are they

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Post by Andy Sayle on 2015-02-05, 09:57

In the admin section. Here's the evidence:

257CF & 237CF  Delete10

In other news, all the fasteners have been ordered, lots of stainless steel goodness to go with the carbon!

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Post by Rich on 2015-02-05, 10:07

Where is it in the admin section I meant

you forgot the back on topic

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Post by Andy Sayle on 2015-02-05, 12:00

Oh yes.

Back on topic again.  I'm going to be offering this kit with several options.  The first is going to be the length of the arms, as explained above.  The second will be the spacing between the two frame plates (to allow for mounting stuff in between the plates, or not).  I'll also offer a 3 plate design too, but I'm not going to be pushing that, it's lots of added weight for not much benefit....

Andy


Last edited by Andy Sayle on 2015-02-05, 13:05; edited 1 time in total

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Post by Mark Barnes on 2015-02-17, 11:40

Ive had a thread clean up to get Back on topic,

I built my 257FM this weekend and flew at Sundays meet. As normal from Andys frames everything lined up spot on and went together with no problems. the carbon looks loverly and is super strong.

With minimal gain turning so far the ship tracked well and is very nimble. So with a bit more tuning I can see this being a very good 250 racer.

257FM Frame kit
Emax 1804 motors, Emax 12amp ESC
5x3 props
3s1p 1000mah lipo
CC3D Flight Controler
Graupner radio with full lipo telemerty
Mobius narrow lens camera
Now standard BB Pink cable tidy

257CF & 237CF  Pic_310

257CF & 237CF  Pic_210

257CF & 237CF  Pic_110

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Post by Mark Barnes on 2015-03-02, 23:04

Oggies very cool, and nicley built 3 tier 257

257CF & 237CF  Fb_img12

257CF & 237CF  Fb_img13

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Post by Odoubleg on 2015-03-03, 00:17

Ah my baby Smile new settings too try next week should be even better
Info on it :
237cf frame
Dys 1806 2300kv motors
Lumenier 12a nfet escs
Fatshark 420tvl cam
Immersionrc 600mw 5.8
Ibcrazy bluebeam ultra 5.8 antenna
Frsky d4r ii rx
Hq 5x4 props
Naze32 fc running cleanflight Smile
Turnigy nano tech 1300mah 45c 3s lipo
Mobius v3 hd cam

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Post by Andy Sayle on 2015-03-03, 13:09

Oggie, what's the outside diameter of them there DYS motors?
Same question to you barnes, but for the Emax motors?

I'm just drawing up some bumpers for the arms....

Andy

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Post by Mark Barnes on 2015-03-03, 14:13

23

257CF & 237CF  Emax_m10

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Post by Odoubleg on 2015-03-03, 14:28

Same here 23

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Post by Andy Sayle on 2015-03-03, 15:56

marvellous. I've done a bolt on horseshoe type bumper that is held in place by the heads of three bolts. It should hold it tightly, but not need the motor bolts to be disturbed to replace/remove.

257CF & 237CF  251h10

Next job is the angled motor mount....


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