my first multirotor build.....sorta.

shawdreamer

Member
after careful research and consideration I initially went with a Dji 450 clone frame kit from Chinaland that came with pretty much everything Id need to build my first quad (a complete ATF kit so to speak)

After following the in places rather badly translated instructions as best I could (being new to the whole multirotor scene I struggled once or twice with the tech lingo even when the translation was accurate:D)

soldiered on regardless and eventually got it all together and working like it should do, took it out for a few flights and was generally happy with it...........and this is were the "sorta" bit in the title comes in), due to a lapse in concentration of which I have no excuse for I accidently switched models on my transmitter and subsequently lost control of my new quad in possibly the worst fashion (It went straight up incredibly fast, turned over, came down incredibly fast:()

after salvaging what I could from the sorry mess that used to be my new quad I ordered replacements and a entirely new frame, there wasnt much real estate to play with on the 450 frame so Id pretty much been confined to fitting everything as was required, the X-mode Alien frame I replaced it with has a great deal more space to play with, which Ive used quite happily:)

Dont have any actual "build" pictures to speak of but I can supply a few "finished" in the hope that some of the great deal more savvy builders on ere offer some pointers.

here she is in all her (not so glorious) glory..... albeit a bit muddy on the props after I flipped her over to check something and didnt wipe em off properly:oops:.
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general spec.
What came with the Kit
F450 Clone FlameWheel Frame
A2212 1000KV Motors
JMT 30A ESC's
QQ Super Flight controller
JMT 11.1V 2200mah 20c lipo battery
10x45 cheapo props (my CF's are diligently awaiting their call on the left there)
RadioLink 6ch Tx & RadioLink 7ch Rx

What Ive added
X-mode Alien frame
Standard 450 landing struts
RGB led's front and back & controller
A battery screamer
A slightly "non-standard" FPV rig
A small supplementary battery for the lights and fpv

LED battery screamer set on the top rear of the frame just behind battery, Led controller ontop of battery (the white thingy), The wires over the screamer are the led feeds.
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After the crash I decided Id much prefer having all the sensitive and less pretty looking stuff tucked away out of sight and easy damage so I extended the motor leads and moved the Esc's into the frames bowels along with the distribution board and FC (makes for better lines too....though purely cosmetic).
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hint at what I meant by "non-standard" fpv in that photo:D

coincidently I just like to say how fortunate I was to choose a kit with the little known QQ Super FC, its a delight for a first timer, granted it doesnt have half the capabilities of some of the slightly more expensive FC's (single flight mode, no acro, no idle-up) but it makes up for that by having twice the benfits for a newcomer with zippo experience building, its an incredibly easy FC to set up with only on adjuster for gain and four DIP switches to select model..... the instruction used one side of a A5 sheet, it was that simpleo_O

The frame has a extended rear top and bottom panel that appears to be purely for a battery (though anything bigger than a 2200 3s would probably be a squeeze)Using it for such however seriously over balanced the frame so I opted to have my Flight battery up top as its easier to swap out and with careful positioning I can offset any imbalance caused by adding and removing gear to the frame.

Instead Ive used the rear slot to house a much smaller and lighter 1100MAh 3s battery I liberated from my sons old AR.drone, this'll power any extra's added to the frame rather than sucking juice from flight battery thats much better served keeping me in the air longer.
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I slung the Receiver underneath while I was at it as I figured that position would give it its best chance of maintaining a good signal (having no experience I could only assume that'd be how it works)

While I was "liberating" parts from the AR.drone I decided to try something out (on the off chance it'd work), I stripped out the Main & Navigation board from the drone and mounted it on a piece of clear perspex (to make mounting it somewhere else more easy) and then mounted the whole package to the underbelly of my frame (the battery was already along for the ride so I figured it might get lonely) plugged it all in and HEY PRESTO for what its worth I had a ready made fpv rig with onboard transmitter and dual cameras (one look down, one that can be placed at leasure, both can record and capture pictures) and limited telemetry (on-screen Battery level, altitude&speed while below 8meters, above that the ultrasonics cant receive and the look-down cam cant see clear enough to measure speed), there's also the added benefit of any Android, windows or Apple Tablet/phone/pc can be used as a monitor without the need for a seperate receiver.
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I dont know just how limited the transmission range is gonna be (the AR.Drone manual claims 50m but thats probably only in perfect conditions) and the forward facing camera hasnt got the best of definition but its more than enough to get some FPV practice in before I sort a proper rig.

overall current weight is just shy of 1300g

well thats basically it really, I do have a little landing gear mod Ill be building and adding at a later date but that wont be happening till the bits arrive obviously......and dependant on wether it actually works out as good as Im hoping it will:rolleyes:.

I have added pictures but until I hit that "create thread" button down there I wont know if Ive done it right so bare with me if I havnt and I hope you enjoy reading my first "complete and utter noob to this whole multirotor thing" build thread.

look forward to comments and will appreciate any pointers from those more wise than myself on the ways of the rotor'ed:D

ps........... before anyone points out that the landing struts are remarkably far from were they should actually be..... its done on purpose, I hate the bloody things, mainly because their ugly and imho look tacky but also becuase they offer next to no stability when landing or taking off (infact their crap even when the frames just sat motionless), were I attached them makes taking off without needing to "punch the throttle" a breeze and landing a much more gentle affair as theres less risk of a "topple over bounce"
 

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shawdreamer

Member
smallish update...

after spending an age looking for some decent prop guards and a retracting gear setup that I actually liked the look of I gave up, what guards I could find were slated in reviews (even the CF types) and the landing gears just looked bulky and combersome.

finally came to the conclusion that I might aswell have a bash at coming up with something myself, not like it'd cost me too much (no more than a set of off the shelf retract gear as it happened).

locked myself away in my little workroom all day yesterday with instructions to the missus to "maintain a steady stream of coffee.....I maybe sometime!"

and very late in the evening of the same day this is the final result (still a bit rough round the edges but completely functional)
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(to tired to dig out my Dslr so just grabbed some quick photos with a snap camera sorry)
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wanted to keep the weight down so used the lightest parts I could readily get my hands on.

Carbon fibre square rods (10x10x170)
epo foam curves taken from and old AR-drone inside hull(top cover too coincidently)
the lightest usable servoless retracts HK had in stock in the UK.

measured weight of whole frame (with 2200mah battery) before and after.

Before (with cheap and nasty F450 legs) - 1332 grams

After (with retracts and minus legs) - 1457 grams

Just over 100 grams of weight added after retract conversion......... Im actually genuinely surprised at how well this little mod has worked out....or least seems to have, Im sure something will jump up and bite me on the arse now Ive said that:rolleyes:
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looks a little weird lowered but live-able for me:)

there is a little video but not to sure If I can figure out how to add it........

you might wanna hit mute too, my Tx battery was dying and the beeping is pure annoying...:D

Low quality video but just to demo....

last bit was me feckin about not the retracts losing it:oops:

as before...

Opinions, views, questions, suggestions and even criticisms totally welcome.
 

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shawdreamer

Member
Ive seen similiar uses on a quad myself but they were setup to fold inwards so were only usable as retracting struts.

it just occured to me at the time that if you have them folding up outwards you could make them dual-usage (plus the folding inwards variaty would inevitably cause issues if you wanted to hang a gimbal below your frame)

though the foam does seem to do a amicable job (I purposefully bounced the quad off a wall earlier at various angles to see how it coped) I cant see it being very durable so Ill likely replace it at a later date with CF board most likely.
 

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