The HK order arrived today so I set to work straight away on the router table and made the frames as per RCExplorer 2.5 build with a little addition I spotted on the delrin kit.... the extra nut and bolt that would stop the are folding back if the arm should come loose.
Got the wood chopped, plenty of it ;)
Notice extra motors and an ESC, just in case!
I think I am going to try the LARGE cable tie as the landing foot as someone else on here has, in theory its a good idea :D
Onward and upward!
The folding back arms makes this tri very crash resistant.
If you add locking bolts you will loose this feature.
I use locking nuts on the 'hinge bolt' & make them super tight, ive never had an arm fold on me.
gl with the build - bet you cant wait eh?
I wish I could have tomorrow off work ;D
Yeah I see the point about the arms.
Ah ha, I come up with an idea.
Instead of the bolt I could use a semi rigid peg something that will give in an impact and brace if the worst happened and the arm loosened.
Maybe balsa?
Just a thought.
Nygie i like your idea i may do that mod myself on the bigger tri thanks :D
hard balsa dowl sounds about right ;)
dizzy
nylon bolts...?
like you used on glow balsa plane wings?
they are meant to shear under stress...
Quote from: Nygie on February 17, 2012, 08:46:55 AM
Maybe balsa?
A little progress with a few pics.
Got the motors on and leccy stuff rough fit.
(http://s18.postimage.org/4sjqjvgpx/IMG_0536_Medium.jpg) (http://postimage.org/image/4sjqjvgpx/)
Sits nicely on the cable tie suspension, idea totally stolen off someone else!
(http://s14.postimage.org/6dmk51p31/IMG_0537_Medium.jpg) (http://postimage.org/image/6dmk51p31/)
Used the packing foam to make a mount for the HK V3 board.
(http://s8.postimage.org/58ruu8n41/IMG_0538_Medium.jpg) (http://postimage.org/image/58ruu8n41/)
Little close up on the tail, as per Tri 2.5 instructions.
(http://s7.postimage.org/lc6t51kfr/IMG_0539_Medium.jpg) (http://postimage.org/image/lc6t51kfr/)
Builds going reasonably well.
Things left to do.....
Get a prop balance and balance the props.
Mount the receiver when the 9X arrives.... if it comes with one. I'll have to check.
Test fly (hop)
Looking god Nygie, she looks quite a size :)
Yeah, the arms are 50cm, some plans said 50 some 48.
Time will tell if the holds up :o
Quote from: Nygie on February 17, 2012, 08:46:55 AM
Ah ha, I come up with an idea.
Instead of the bolt I could use a semi rigid peg something that will give in an impact and brace if the worst happened and the arm loosened.
Maybe balsa?
Just a thought.
bbq skewer?
Stainless or bamboo :laugh:
Maybe will have to do some strength testing.
thinking a bamboo skewer cut to length, with a blob of hot glue on top/bottom to keep it in during normal operation, but with the ability to "fail" on hard landings
I find the legs stay put on my tri and there's no need for a locking mechanism.
But you could put 2 pins in the front legs and stretch an elastic band between them , will stop any chance of them slipping out of place and still allow them to fold in a crash without having to replace any kind of "fuse" bolt. Would actually be handy for when your transporting it to keep everything together.
some good ideas guys. I like the elastic band idea.
I like your cable tie legs, great idea.
;) G
Saw them on Rcgroups.com. Not sure if I saw someone here with them also?
Finally got the YAW reversed and had time to try the first few hops in the small confines of the garage (couldn't wait for daylight)
http://youtu.be/yIGKRVaQia8 (http://youtu.be/yIGKRVaQia8)
The video should be live in 20 minutes - circa 20:20 hrs GMT
10 times better than my first go
im pretty sure its poor form not to crash and burn your first go though, lol
Technically I did crash, the prop whacked my roll cab :laugh: No damage tho which = no burn. Crashed and no burn :P
........until the next time :o
After the trauma with the flight controller, I managed a few minutes in the garden before it started raining!
Trouble with FC was not arming on V2.5.
On 1.6 two motors where lame or one was fast :o
REflashed 2.5 and it works, ESC's calibrated and has a pretty stable hovver ........EXCEPT
The front right motor seems to be glitching a little???
I have some video, when it's finished processing I'll upload it, you can just about hear the glitching in the motor.
And the video will take at least an hour to be live (now 20:51hrs). crappy upload (and HD video :)
http://youtu.be/-v7gG9TXiyo (http://youtu.be/-v7gG9TXiyo)
Listen carefully and you can hear the glitching on the right motor, seems to fly ok tho axcept for the little wobble casued by the glitching.
I really like those legs too - stolen!
yup, legs look nice and bouncy lol
Quote from: Steve W on March 03, 2012, 09:53:59 PM
I really like those legs too - stolen!
Just as I did :o
With regards the right motor glitching I will check the blades in the morning as I did notice a little nik out of one of the blades.
Check your wiring too
Will do , I've got a spare ESC in case that's up the swanny!
Different ESC didn't make a difference, I'll try another reflash, as it never did I before the FC went wonky!
She is looking pretty stable. looks a good build too, clever idea using those giant cable ties for landing gear i bet they take a lot of energy out of the odd hard landing :D
dizzy
Are your gains set properly? If mine are too sensitive, it wants to fall out of the sky heh
Yeah it is very stable, the gyros are working well.
Took it to new heights today testing the replaced ESC.
Did a few high thrust ascents and it was cool virtually no yaw at all.
Just need to sort this glitching out and i'll get the camera powered up and do a bit of onboard video to see what it looks like.
the roll and pitch gains are very low. they don't seem to make a massive difference..... I turned the roll to minimum yesterday to see if it was the roll gyro casuing the glitching on the right motor, and it was just as stable, but still had that little bounce in the right leg caused by the glitching.
Reflash tomorrow and see if that works.
Got all the gear loaded, went out this morning with the intent of FPV'ing her and it was a bit breezy.
So I had a little LOS and it was quiet windy once you got twenty foot or so of the ground.
I WAS TOO SCARED TO TAKE THE PLUNGE TODAY!
Better to select zone 5, extend and escape save the palne for another day!
First oboard video http://youtu.be/r1WFRkcmyW8 (http://youtu.be/r1WFRkcmyW8) live in 15 mins (approx 12:15)
Video was pretty smooth, just a tiny bit of virbation that seemed to be coming from the right of the screen. Looks nicely balanced.
#Finally got around to maiden FPV last night.
It's quite intense!
Managed to land without crashing kind of.... no broken blades = not crashed :P
My turns are a little indifferent, not really got the hang of that yet. Just stop and yaw lol
My board (HK V3) threw a wobbler, managed to get it on the ground! but I LOS a few take offs and it was just tipping forward quite agressively.
Changed the battery and it was just the same, so I trimmed it out.
Then as the last LOS of the night it started coming back all the time, trimmed it up again and the trim was back to centre! How strange!
Sounds like gyro drift on the board
I thought that but would have expected it to reset when. I changed the battery??