MTnet Builds Flying Machines: Failure Accomplished - Page 4 - Miata Turbo Forum -Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


Insert BS here A place to discuss anything you want

Reply
 
 
 
LinkBack Thread Tools Search this Thread
Old 04-30-2013, 11:15 PM   #61
Destroyer of Inconel
iTrader: (37)
 
EO2K's Avatar
 
Join Date: Apr 2010
Location: In ur driveway, abusin' ur WPA
Posts: 8,764
Total Cats: 750
Default

He sounds like a Miataturbo.net moderator. Banned! Banned! Banned!
EO2K is offline   Reply With Quote
Old 04-30-2013, 11:27 PM   #62
Elite Member
iTrader: (3)
 
Join Date: Feb 2008
Location: Huntsville, AL
Posts: 1,867
Total Cats: 45
Default

You know they'll make her dance, right?
vehicular is offline   Reply With Quote
Old 04-30-2013, 11:28 PM   #63
Elite Member
iTrader: (3)
 
Join Date: Feb 2008
Location: Huntsville, AL
Posts: 1,867
Total Cats: 45
Default

Sloopy, I mean. Bands will make Sloopy dance.
vehicular is offline   Reply With Quote
Old 04-30-2013, 11:38 PM   #64
Elite Member
Thread Starter
iTrader: (1)
 
Join Date: May 2009
Location: Jacksonville, FL
Posts: 4,654
Total Cats: 209
Default

I dont even know whats happening anymore.

I flew today in some pretty high winds with tw34k, video looks like **** and I think I need more vibration dampening on my controller board. Enjoy the music, lol

Full_Tilt_Boogie is offline   Reply With Quote
Old 05-06-2013, 04:50 PM   #65
Destroyer of Inconel
iTrader: (37)
 
EO2K's Avatar
 
Join Date: Apr 2010
Location: In ur driveway, abusin' ur WPA
Posts: 8,764
Total Cats: 750
Default

That's some winning right there.

I destroyed one of my motors before it even made it off the workbench. BECAUSEFAILMACHINE
EO2K is offline   Reply With Quote
Old 05-26-2013, 04:18 AM   #66
Elite Member
Thread Starter
iTrader: (1)
 
Join Date: May 2009
Location: Jacksonville, FL
Posts: 4,654
Total Cats: 209
Default

Heres a little bit of video I got recently flying yet again in some high winds both times:

Also, I have been slowly upgrading the old aluminum X frame. I drilled out a few rivets and rebuilt it with a lexan top and bottom plate, held down with 10-32 button head screws.

The lexan is very strong and most importantly it is flat. This brought the frame back to being straight and true after surviving several hard crashes.

Then I added some extended motor mounts wich will allow me to run a 10 or 11 inch prop with some new motors. So now Im just waiting for some parts.
Attached Thumbnails
MTnet Builds Flying Machines: Failure Accomplished-img_4829_re_small_zps80c67353.jpg   MTnet Builds Flying Machines: Failure Accomplished-img_4836_re_small_zpsc22f67dd.jpg   MTnet Builds Flying Machines: Failure Accomplished-img_4829_re_small_zps80c67353.jpg   MTnet Builds Flying Machines: Failure Accomplished-img_4836_re_small_zpsc22f67dd.jpg  
Full_Tilt_Boogie is offline   Reply With Quote
Old 05-26-2013, 04:44 AM   #67
Elite Member
iTrader: (2)
 
triple88a's Avatar
 
Join Date: Apr 2006
Location: Chicago, IL
Posts: 8,876
Total Cats: 486
Default

I'm assuming the motor mounts are weak on purpose to give away in a crash?
triple88a is offline   Reply With Quote
Old 05-26-2013, 12:46 PM   #68
Destroyer of Inconel
iTrader: (37)
 
EO2K's Avatar
 
Join Date: Apr 2010
Location: In ur driveway, abusin' ur WPA
Posts: 8,764
Total Cats: 750
Default

I too am digging the mounts, where are they from?

So it turns out the APM firmware for Tri's is a giant piece. Something is not allowing my yaw servo to return to zero if there is ANY throttle input at all. I can pull the props and bolt the bitch to the floor and it still stays about 10-15 off center if I give it yaw input and throttle. This causes it to spin like a many bladed top as soon as it breaks ground. I can also see the servo jitter like crazy as I throttle up. Everything is exactly the same when the components are removed from the frame and bolted directly to my workbench. If I remove the APM and plug everything directly into the receiver, it's 100% true and works as expected. Sad panda up in here.

I'm going to order a quality "filtered" BEC and some torrad rings to try to isolate this, but I think the APM is ultimately going to end up on a Quad.
EO2K is offline   Reply With Quote
Old 05-26-2013, 01:18 PM   #69
Elite Member
Thread Starter
iTrader: (1)
 
Join Date: May 2009
Location: Jacksonville, FL
Posts: 4,654
Total Cats: 209
Default

Here are the motor mounts
Hexacopter Quadcopter Multicopter Motor Mount Hobby King Alum ATG 400 X500 X525 | eBay
Theyre actually pretty strong, but I bought an extra 2 because I figure I will eventually bend some up.

EO2K,
Thats pretty lame. I havent really paid much attention to tricopter electronics. Maybe some kind of little multiwii lite board? Its mostly going to be for fun flying, acrobatics Id imagine.
Full_Tilt_Boogie is offline   Reply With Quote
Old 05-26-2013, 01:31 PM   #70
Destroyer of Inconel
iTrader: (37)
 
EO2K's Avatar
 
Join Date: Apr 2010
Location: In ur driveway, abusin' ur WPA
Posts: 8,764
Total Cats: 750
Default

I'll figure something out with it eventually, I'm just disappointed I'm not smashing it into the ground this weekend.

In all fairness, it could be my servo. Ive got another HS82MG i can try I just haven't been motivated after ripping things apart. The 82 is analog, so I may also try a high torque digital metal gear servo and see if that fixes anything. Its only money, right?!
EO2K is offline   Reply With Quote
Old 05-26-2013, 01:43 PM   #71
Elite Member
Thread Starter
iTrader: (1)
 
Join Date: May 2009
Location: Jacksonville, FL
Posts: 4,654
Total Cats: 209
Default

I know Ive seen people use analog servos, but the fast majority seem to use digital and digital is what is always suggested.
I think you would want to get a good digital servo regardless, so with that logic you can justify throwing more money in the toilet, hahaha.

What size motors are you using?
Just last night I was helping my buddy build a ghetto/cheap tricopter using an old futaba analog servo. We haven't flown it yet but we were already researching servos.
If I were you Id pick one up from HobbyPartz.com because its in the states and they deliver quickly.
This was what I was suggesting to him for moving around a big ol' DT750:
Solar Servo D222 0.17@6.0v Digital 37g
but its probably overkill if youre running a smaller motor.

EDIT:
Couple extra pics

Attached Thumbnails
MTnet Builds Flying Machines: Failure Accomplished-img_4846_re_small_zps7a61d224.jpg   MTnet Builds Flying Machines: Failure Accomplished-img_4858_re_small_zpsda1787b1.jpg  

Last edited by Full_Tilt_Boogie; 05-26-2013 at 01:58 PM.
Full_Tilt_Boogie is offline   Reply With Quote
Old 05-27-2013, 05:33 PM   #72
Destroyer of Inconel
iTrader: (37)
 
EO2K's Avatar
 
Join Date: Apr 2010
Location: In ur driveway, abusin' ur WPA
Posts: 8,764
Total Cats: 750
Default

Motors are Turnigy D2836/11 750KV. Closest thing I could find at HobbyKing to the DT750s that are now perpetually out of stock.

Muy Problemas


As you can imagine, this makes taking off somewhat problematic.
EO2K is offline   Reply With Quote
Old 05-27-2013, 05:38 PM   #73
Elite Member
iTrader: (2)
 
triple88a's Avatar
 
Join Date: Apr 2006
Location: Chicago, IL
Posts: 8,876
Total Cats: 486
Default

Maybe i missed it but why are you running servos on the motors instead of slowing down one propeller to turn?

Btw you seem to be missing propellers. Just though i should mention that.
triple88a is offline   Reply With Quote
Old 05-27-2013, 06:14 PM   #74
Destroyer of Inconel
iTrader: (37)
 
EO2K's Avatar
 
Join Date: Apr 2010
Location: In ur driveway, abusin' ur WPA
Posts: 8,764
Total Cats: 750
Default

Quote:
Originally Posted by triple88a View Post
Maybe i missed it but why are you running servos on the motors instead of slowing down one propeller to turn?
Because Tricopter, not Quadcopter. Yaw control on a tri is done by pitching the rear motor relative to the frame.
Quote:
Originally Posted by triple88a View Post
Btw you seem to be missing propellers. Just though i should mention that.
EO2K is offline   Reply With Quote
Old 05-27-2013, 06:33 PM   #75
Elite Member
Thread Starter
iTrader: (1)
 
Join Date: May 2009
Location: Jacksonville, FL
Posts: 4,654
Total Cats: 209
Default

Thats weird. What servo are you using? Maybe its running out of torques.

I see people running as much as 6kg/cm holding torque servos.
Full_Tilt_Boogie is offline   Reply With Quote
Old 05-27-2013, 07:56 PM   #76
Elite Member
iTrader: (2)
 
triple88a's Avatar
 
Join Date: Apr 2006
Location: Chicago, IL
Posts: 8,876
Total Cats: 486
Default

I'd imagine when the props are pulling the servo up it should be much easier to go straight.
triple88a is offline   Reply With Quote
Old 05-27-2013, 11:12 PM   #77
Senior Member
 
ianferrell's Avatar
 
Join Date: Aug 2010
Location: Maumelle, AR
Posts: 617
Total Cats: 2
Default

I've read that the refresh rate apm runs for servos can be too high, which can cause jitters and even broken Servo guts... even on digital servos so you might try dropping that down.
ianferrell is offline   Reply With Quote
Old 05-28-2013, 02:25 AM   #78
Destroyer of Inconel
iTrader: (37)
 
EO2K's Avatar
 
Join Date: Apr 2010
Location: In ur driveway, abusin' ur WPA
Posts: 8,764
Total Cats: 750
Default

Full_Tilt_Boogie: My apologies for the threadjacking LMK if I should

Quote:
Originally Posted by Full_Tilt_Boogie View Post
Thats weird. What servo are you using? Maybe its running out of torques.

I see people running as much as 6kg/cm holding torque servos.
Hitec HS-82MG Micro Metal Gear Servo 2.8kg/0.12sec/19g
Its not the strongest thing ever, but Hallstudio on Youtube is using the **** out of these things on his own tri's. (Skip to 46 minutes)


He's running a far more ghetto looking tail boom assembly and SunnySky V2212-9 1400KV motors @ 70g/ea, so same weight neighborhood.

Quote:
Originally Posted by triple88a View Post
I'd imagine when the props are pulling the servo up it should be much easier to go straight.
Valid, but even with a prop on it it does the same. I tend to remove the props indoors, Lola kitty seems to be very interested in the machine.

Quote:
Originally Posted by ianferrell View Post
I've read that the refresh rate apm runs for servos can be too high, which can cause jitters and even broken Servo guts... even on digital servos so you might try dropping that down.
Yeah, been reading about this today some more. It sounds like this may be an "edit the code" thing. This is the obnoxious part of open source
EO2K is offline   Reply With Quote
Old 05-28-2013, 03:06 AM   #79
Elite Member
Thread Starter
iTrader: (1)
 
Join Date: May 2009
Location: Jacksonville, FL
Posts: 4,654
Total Cats: 209
Default

Naw its cool. This is now the official multirotor thread lol

So tonight Tw34k and I built a tricopter from scratch with spare parts, including the old futaba analog servo I mentioned before.
Ill try to get him to get in here and post some pics.
Full_Tilt_Boogie is offline   Reply With Quote
Old 05-28-2013, 02:07 PM   #80
Destroyer of Inconel
iTrader: (37)
 
EO2K's Avatar
 
Join Date: Apr 2010
Location: In ur driveway, abusin' ur WPA
Posts: 8,764
Total Cats: 750
Default

Quote:
Originally Posted by Full_Tilt_Boogie View Post
What size motors are you using?
Just last night I was helping my buddy build a ghetto/cheap tricopter using an old futaba analog servo. We haven't flown it yet but we were already researching servos.
If I were you Id pick one up from HobbyPartz.com because its in the states and they deliver quickly.
This was what I was suggesting to him for moving around a big ol' DT750:
Solar Servo D222 0.17@6.0v Digital 37g
but its probably overkill if youre running a smaller motor.
37g is a bit porky, my "ALLOFIT" weight is 835g right now, and the HS82 is a 19g servo as is. Doubling the weight seems overkill. I'd like to stay under 25g and 4kg+ if I can. There is a BlueBird BMS-390DMH from HK I have my eye on, but its backordered from the US warehouse and I tire of waiting for tiny parts from China.

Edit: Lol @ HobbyKing
TGY-390DMH High Performance MG Digital Servo (Extra Strong) 5.4kg / .11sec / 22.5g (US Warehouse)
BMS-390DMH High Performance Digital Servo (Extra Strong) 5.4kg / .11sec / 22.5g (US Warehouse)
I wonder what the difference is? hah! I'll probably order one and try it out.

Last edited by EO2K; 05-28-2013 at 02:29 PM.
EO2K is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Project Gemini - Turbo Civic on the Cheap Full_Tilt_Boogie Build Threads 53 12-07-2016 05:52 PM
15x10 - 15x11 6UL @ 949 Racing emilio700 Wheels and Tires 143 05-21-2016 06:48 PM
WTB MP62 (Hotside) (NB2) Rick02R WTB 3 01-03-2016 08:18 PM
Back to Stock Part Out!! Turbo Parts, MS2 Enhanced 01-05, Suspension, and MOAR! StratoBlue1109 Miata parts for sale/trade 16 10-02-2015 10:39 AM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -4. The time now is 11:00 PM.