Home Made Multicopter

[sakiskoz]

Hi
This is my new home made quad frame with carbon plate (talon V1), CF 34,5cm 12mm booms, aluminium motor base and my motor plate from ply - class fibber and epoxy 5 min. , scales from 500 class heli and 2 pieces aluminioum.

[Gaza07]

Nice build Sakis thanks for posting looking forward to the test flight video's 
the carbon fibre tubes make things very neat running the wires inside, I haven't seen those esc's before, have you used them before can they be flashed ?
I Also really like the looks of your under carriage where do you get them from

[sakiskoz]

Hi Gary
I found this on ebay, He shows to me an other multi friend ho he used, its ok but i think i must cut the blue material for better fitting, will see.......
Cross Shaped 4 Port Pneumatic Fittings Connector 12mm http://www.ebay.com/itm/400297509263?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649

I use in all my copters this ESC's Turnigy AE 25 - and Fw is original and runs 400Hz

I make same flight but for now i am not happy.

[Gaza07]

Those connectors look just the job, I think the blue bit locks the tube in, I will have a look on HK at the esc's, what's wrong with the test flight is it some thing you can fix easily ?

[sakiskoz]

I can not explain good - you see my English - In stock settings 450cm-650cm / 650cm-plus i have many wobble, acceptable flight i have 300-450cm in both 2011 and 2012 .

Will see   

[teslahed]

It's difficult to say what could be causing your wobbles because you haven't given much information and in the pictures your quadcopter looks good as far as i can tell.

If the wobbles are very fast you may have your gyro or PID settings set too high.

If the wobbles are slower your gyro or PID settings may be too low.

If the frame itself is not stiff enough and is too flexible that could make the quadcopter fly badly.

If your quadcopter is too heavy or your motors are underpowered then they will struggle to make it fly well and that could cause it to wobble in the air. I see your quadcopter weighs about 1.66kg which isn't the lightest - what motors have you used?

[sakiskoz]

it's not the weight i have the same behaviour and with aluminium booms which is heavier, motors have more than enough power, for that i change props from 11x47 to 10x45 . If i use HK KK board is ok. Setting of rabbit is problem. I use ubec 8-15A, all ESC is connect only with line, same for receiver except throttle. I have not magnetic field and All i think it's ok.

[MadMax]

Did you manage to solve your problems with your new frame, looks great BTW 

[sakiskoz]

I cut booms 11cm and now is 46 cm diameter and 23,5 cm each boom.
this booms are 12mm and is very elastic for this copter weight.
I thing 14-16mm and up is better. Now I have my smaller diameter copter.
In video with on board camera is with out gimbal and you can see behaviour and stability of position hold.
I am not for this time contented i think need more tuning my hexa is more stable.

If you have open voice when you see the video you can hear at time 1:08 i open pos. Holt and after that at 1:31 and 2:15 i have  2 more beeps, i dont know what is this, that only remember i use a little throttle

RABBIT FC Position Hold FW 1211 - HK wing camera

[Gaza07]

A gimble would prob sort out the movements by the gps and the wind, I agree though 12mm is probably a bit small for that size mult rotor, rctimer have a carbon fibre gimble at a really good price 

http://www.rctimer.com/index.php?gOo=goods_details.dwt&goodsid=705&productname=

[MadMax]

Looks like you cut the arms down by quite a bit, so the problem was the arms flexing then 

[sakiskoz]

Looks like you cut the arms down by quite a bit, so the problem was the arms flexing then 

Yes it starts from flexibility of arms and then goes vibrations to all copter and of course to board. 

[sakiskoz]

Video from my airfield club in windy day with position Hold and short course

RABBIT FC FW 1211 - HK wing camera

[Gaza07]

Looks like your getting a few vibes there sakis, your flying club looks very good a nice place to fly 
was the purple colour caused by vibes ?
Did you have any problems going back to v1.211 as when I did it, I thought my board was broken as itkept crashing,
I had to fix it by flashing the v1.211 firmware with the v1.212 app, it all fixed now though and back to the reliable v1.211 

[sakiskoz]

 Vibes are from wind, in video can see the wind but are very strong.
I cant have good opinion, because i move board from hexa to Quad and i had 1212 and go back to 1211 when i put board to Quad. My first attempt to upload 1211 is from 1210e CUI with no luck and next i try from 1212 CUI and it is OK, I dont remember if upload again 1211 from 1210 CUI
That Colours is happen to me first time, I have see that problem to other modeller with same camera. This camera is sucks   

[MadMax]

you have a nice flying club is it just for your club or do you share it with others, it looks like its in the middle of no where 

[sakiskoz]

you have a nice flying club is it just for your club or do you share it with others, it looks like its in the middle of no where 

Yes is nice and it is my personal job and i had work very hard to create all this with 2 others modeller friends when i was President of this club.
This airfield is the only one in Greece who can travel to it in asphalt.
Mostly is for club members and for any other to Greece where have insurance from GREEK FEDERATION AERATHLITIKIS. 

150 meters runway with 12 meters width
60 meters length with 10 meters width for modeller pits
2 sheds 5mX10m each if i remember right.
All area 14000m2 square feet

[teslahed]

Sounds very nice - looks like you have plenty of space 

[sakiskoz]

Hi
That is my new transform of my Quad
I removed cd case to see if i lose something with it..
Visually I do not like but have a good flight with 2 first flights who i did.
In GPS manual write - Finally, remember the normal work of Rabbit GPS needs the cooperation of self stability mode, height lock, magnetic sensor ( CF and heading lock cannot be open), please make these functions have appropriate switch! -

I flight Position Hold with Normal Mode (Acro) and is exactly same behaviour if i chose Auto Stab Mode...


Please see Video

RABBIT FC Position Hold FW 1211 - HK wing camera 010812

[sakiskoz]

HI
I make this long video to see how soft can fly my copter and how Sonar and baro can help.
Except vibration in gimbal that i see copter is very stable, i need more expo in aileron, Sonar don't help but baro it works good and is old baro
I have not wind.
Sakis

RABBIT FC - EKLISIA - HK wing camera 010812 

[Gaza07]

Nice video sakis deff a few vibes from some where, nice looking church building well done keep them coming 

Just a thought maybe the props being in the view could cause some problems with the video I seem to recall some one else having a a problem with visible props and it was much better when they weren't seen

[sakiskoz]

Nice video sakis deff a few vibes from some where, nice looking church building well done keep them coming 

Just a thought maybe the props being in the view could cause some problems with the video I seem to recall some one else having a a problem with visible props and it was much better when they weren't seen

I think you are right about props i see in videos is not a line when spinning but i had good balancing them and is Gefman, supposed is much better than others i have.
I am still waiting  APC's

Thanks
Sakis

[sakiskoz]

One more video
I have 3 attempts test Auto Landing , I forget to choose GPS in CUI and works only AL and not Go Home that i want to Test
Sorry for my bad video filming

http://youtu.be/T0MktHYVgiI

[Gaza07]

It looks like it lands ok I tried it close in and it worked each time and disarmed the board, I will try it further away and with gps when I get to my local field which lately isn't to often 

Have a look in the general section at the guy with a mini quad on a motor bike I think its really good 

[MadMax]

Nice church sakiskoz I agree the props seem to be interfearing with your video maybe you should try to get the camera under the quad,
@ Gaza07 The Lego bike is very good nice find 

[sakiskoz]

Have a look in the general section at the guy with a mini quad on a motor bike I think its really good 

Sorry Gary I cant understand what you mean.

[sakiskoz]

Nice church sakiskoz I agree the props seem to be interfearing with your video maybe you should try to get the camera under the quad,
@ Gaza07 The Lego bike is very good nice find 

Yes church is good , if i remember its only 15-20 years and of curse priest is happy for video scoping and curious to explain him how copter works.

What is Lego Bike?

[Gaza07]

Have a look here sakis http://www.multi-rotor.co.uk/index.php/topic,245.0.html 

[sakiskoz]

This is my new Gimbal.
I test this evening and works nice with out vibration in hover mode

[MadMax]

That should improve things with the camera being below the props, where did you get the gimble form