RC India
Welcome Guest, please login or register.
 
Pages: [1]   Go Down
0 Members and 1 Guest are viewing this topic. Topic Tools Topic Tools 
Read
« on: February 07, 2012, 10:47:11 PM »
rohitgupta322
Plane Lover
Forum Hero

*****

Reputation Power: 12 
rohitgupta322 has no influence.
Offline Offline

City: Illinois, USA
State: OUTSIDE INDIA
RC Skills: Beginner
Posts: 986
Join Date: Feb, 2010




Have been working on this project in the background for a month now. After lots of reading, researching, tweaks and trims, I have reached this stage(video below). Now I need all the veterans to help me here to further stabilise the whole system. The roll and yaw are fine, the pitch is very difficult to control especially at high throttle inputs it becomes very unstable and has a tendency to fall backwards(dont know why, because the battery and inverted motor positions are ought to keep it in stable equilibrium) but for some reason it isn't working to the optimum capacity, though it is far far better then what it was when I first started!

IMG_20120207_213220.jpg
RC Vtol testing!
* IMG_20120207_213220.jpg (34.68 KB, 800x360 - viewed 497 times.)
This post has 2 more images(s)/attachment(s). Please login or register to view them.
Logged

Be Inquisitive
 

Read
« Reply #1 on: February 07, 2012, 10:49:51 PM »
rohitgupta322
Plane Lover
Forum Hero

*****

Reputation Power: 12 
rohitgupta322 has no influence.
Offline Offline

City: Illinois, USA
State: OUTSIDE INDIA
RC Skills: Beginner
Posts: 986
Join Date: Feb, 2010



Video :
http://www.youtube.com/watch?v=bsjSCw1714o&feature=youtu.be
Logged

Be Inquisitive
 

Read
« Reply #2 on: February 07, 2012, 10:51:33 PM »
VC
Boat Lover
Forum Hero

*****

Reputation Power: 64 
VC is a rising star!VC is a rising star!VC is a rising star!VC is a rising star!VC is a rising star!VC is a rising star!
Offline Offline

City: Guwahati
State: Assam
RC Skills: Beginner
Posts: 5592
Join Date: Nov, 2009

L'enfant Terrible du RCIndia



WOW! Can't wait to see her - I hope she will be ready by mid March?
Logged

Growing old is mandatory, growing up is optional!
 

Read
« Reply #3 on: February 07, 2012, 10:52:32 PM »
rohitgupta322
Plane Lover
Forum Hero

*****

Reputation Power: 12 
rohitgupta322 has no influence.
Offline Offline

City: Illinois, USA
State: OUTSIDE INDIA
RC Skills: Beginner
Posts: 986
Join Date: Feb, 2010



Trying hard. Running out of ideas though!
Logged

Be Inquisitive
 

Read
« Reply #4 on: February 07, 2012, 11:00:45 PM »
VC
Boat Lover
Forum Hero

*****

Reputation Power: 64 
VC is a rising star!VC is a rising star!VC is a rising star!VC is a rising star!VC is a rising star!VC is a rising star!
Offline Offline

City: Guwahati
State: Assam
RC Skills: Beginner
Posts: 5592
Join Date: Nov, 2009

L'enfant Terrible du RCIndia



Saw the video. She seems good. Is there any way that I can help?
Logged

Growing old is mandatory, growing up is optional!
 

Read
« Reply #5 on: February 07, 2012, 11:07:24 PM »
spinzdude10
Heli Lover
Senior Member

***

Reputation Power: 2 
spinzdude10 has no influence.
Offline Offline

City: Jaipur
State: Rajasthan
RC Skills: Beginner
Posts: 117
Join Date: Aug, 2011



hey which control board r u using???
Logged

Ashutosh Jain
ph : +919928877712
 

Read
« Reply #6 on: February 07, 2012, 11:16:47 PM »
AyushGupta
Plane Lover
Active Member
**

Reputation Power: 2 
AyushGupta has no influence.
Offline Offline

City: Dehradun
State: Uttarakhand
RC Skills: Intermediate
Posts: 86
Join Date: May, 2010



Its seems to be a KK board and the code seems to be something similar to the Flycam twincopter. You may have a look at it for details and help...

http://www.kkmulticopter.kr/index.html?modea=flycamfc
The code is located around middle of the page.
Logged
 

Read
« Reply #7 on: February 08, 2012, 08:19:17 AM »
rohitgupta322
Plane Lover
Forum Hero

*****

Reputation Power: 12 
rohitgupta322 has no influence.
Offline Offline

City: Illinois, USA
State: OUTSIDE INDIA
RC Skills: Beginner
Posts: 986
Join Date: Feb, 2010



The board is a normal HK quad board reflashed with the KK Twincopter firmware.

@VC bhaiya: I can't figure out why it wants to fall backwards at high throttles, that is why you see me flying it very close to the ground. As soon as I take it up the pitch becomes very unstable and its reactions get exaggerated to small control inputs most of the time it wants to fall backwards. I tried changing the trims, gains, adjusting the C.G but this is the best I have come  up till now.

I request all the veterans to help me with this.
Logged

Be Inquisitive
 

Read
« Reply #8 on: February 08, 2012, 08:38:13 AM »
rohitgupta322
Plane Lover
Forum Hero

*****

Reputation Power: 12 
rohitgupta322 has no influence.
Offline Offline

City: Illinois, USA
State: OUTSIDE INDIA
RC Skills: Beginner
Posts: 986
Join Date: Feb, 2010



Another thing is that it is very responsive to throttle inputs too, if I reduce the throttle by a tiny bit, it falls to the ground!
Logged

Be Inquisitive
 

Read
« Reply #9 on: February 09, 2012, 01:43:20 AM »
anwar
Administrator
Forum Hero

*****

Reputation Power: 141 
anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!
Offline Offline

City: Doha (Qatar) & Thrissur
State: Kerala
RC Skills: Advanced
Posts: 11619
Join Date: Mar, 2009

RC India - Flying and racing with open minds !



Looks OK for the most part. Throttle sensitivity can be partially handled with a proper throttle curve.  Selection of props and KV of motors will also affect throttle sensitivity.

Be sure to turn on some expo (like -40 on Futaba or +40 on other radios) on the aileron and elevator channels, especially if you are not an experienced heli flier.  Note that being a plane flyer does not help much with flying these types of crafts which are mostly controlled like how helis are controlled.

Of course gains and PID tuning would have an impact.
Logged

Hangar : Please see my introduction.
RC India forum and me : About this forum.
 

Read
« Reply #10 on: February 09, 2012, 02:49:14 PM »
SunLikeStar
Forum Administrator
Forum Hero

*****

Reputation Power: 20 
SunLikeStar barely matters.SunLikeStar barely matters.
Offline Offline

City: Pune
State: Maharashtra
RC Skills: Intermediate
Posts: 1902
Join Date: Aug, 2010

High spirits we have: gravity we flout.



Will a dihedral help Huh? I mean instead of using a straight boom what if booth arms are kept at slight angle like in dihedral wings  Undecided
Logged
 

Read
« Reply #11 on: February 09, 2012, 08:27:10 PM »
rohitgupta322
Plane Lover
Forum Hero

*****

Reputation Power: 12 
rohitgupta322 has no influence.
Offline Offline

City: Illinois, USA
State: OUTSIDE INDIA
RC Skills: Beginner
Posts: 986
Join Date: Feb, 2010



Thanks Anwar Sir. Yes I'll incorporate the suggestions in the next test flight specially the throttle curve. I do have expos on the roll and pitch. What is PID tuning BTW?
My only concern is that when it is low to the ground it flies pretty well, but once I take it up high above the ground, it has a tendency to fall backwards, i mean it starts to oscillate and any pitch corrections make it even worse, lastly it goes into this suicide fall backwards even though the battery(which I have purposely placed at the bottom) is supposed to bring it back to the neutral position but it doesn't.

@sunlikestar : Yes I was also thinking about that, will incorporate it in the next build, presently i'm trying to gather as much data from this one.
Logged

Be Inquisitive
 

Read
« Reply #12 on: February 10, 2012, 08:59:24 AM »
roopeshkrishna
Boat Lover
Forum Hero

*****

Reputation Power: 41 
roopeshkrishna might someday be someone...roopeshkrishna might someday be someone...roopeshkrishna might someday be someone...roopeshkrishna might someday be someone...
Offline Offline

City: calicut
State: Kerala
RC Skills: Beginner
Posts: 3602
Join Date: Oct, 2010

HYDRO PLANER.....



nice..and so inspiring efforts..Rohit.. Hats Off
Logged

Phoenix.........
 

Read
« Reply #13 on: February 10, 2012, 01:17:10 PM »
rohitgupta322
Plane Lover
Forum Hero

*****

Reputation Power: 12 
rohitgupta322 has no influence.
Offline Offline

City: Illinois, USA
State: OUTSIDE INDIA
RC Skills: Beginner
Posts: 986
Join Date: Feb, 2010



Thank you Rupesh bhaiya. BTW your efforts are the real inspiration for everyone out here!
Logged

Be Inquisitive
 

Read
« Reply #14 on: February 21, 2012, 07:26:00 PM »
atulrajguru9
Plane Lover
Forum Veteran
****

Reputation Power: 5 
atulrajguru9 has no influence.
Offline Offline

City: Pune
State: Maharashtra
RC Skills: Beginner
Posts: 337
Join Date: Nov, 2010



Very inspiring efforts!!

Can you please list the parts used in this project?

Thank you,
Atul
Logged
 

Read
« Reply #15 on: February 25, 2012, 05:37:55 AM »
KALYANPRODHAN
Global Moderator
Forum Hero

*****

Reputation Power: 17 
KALYANPRODHAN has no influence.
Offline Offline

City: Kolkata
State: West Bengal
RC Skills: Intermediate
Posts: 1521
Join Date: Jul, 2010

Information sharing improves knowledge of both.



Rohit,
The VTOL motor mounts are adjustable to forward, backward direction. But the lateral swing starts this unbalance. Proportional, Integral Derivative (PID) control may be introduced in board. But I think, dihedral (For motor mount in addition to battery at bottom) may help or make more unstable as per code adjustment.

Just test by keeping battery little top by moving CG Up to match the program parameter.
Later Just adjust program parameter. As, I am not even see the code even for once, I may be wrong, but first take out CG position and then adjust CG & take another Data.

More on phone next day.
Logged

We have to unite and to prove ourself to make indigenous products as well as marketing / Canvasing them. I'm sure we must achieve success if we try unitedly.
 

Read
« Reply #16 on: February 25, 2012, 10:10:36 AM »
rohitgupta322
Plane Lover
Forum Hero

*****

Reputation Power: 12 
rohitgupta322 has no influence.
Offline Offline

City: Illinois, USA
State: OUTSIDE INDIA
RC Skills: Beginner
Posts: 986
Join Date: Feb, 2010



Thank you Kalyan Da. Actually, I have chalked out a number of changes to the design that I will incorporate in the next model, currently I'm busy searching for materials/components that are required for the next design.

Oh BTW , I need to talk about the PID control.
« Last Edit: February 25, 2012, 10:21:32 AM by rohitgupta322 » Logged

Be Inquisitive
 

Read
« Reply #17 on: February 25, 2012, 10:17:24 AM »
rohitgupta322
Plane Lover
Forum Hero

*****

Reputation Power: 12 
rohitgupta322 has no influence.
Offline Offline

City: Illinois, USA
State: OUTSIDE INDIA
RC Skills: Beginner
Posts: 986
Join Date: Feb, 2010



@ Atul : I am really sorry, I forgot to reply. Actually I haven't used anything out of the box for this model. Basically a wooden dowel(rectangular cross-section) over which everything is attached. I mounted the motors to a foam piece through which I have run a carbon fibre rod that is free to rotate and is connected to a servo on either side. The motors are the normal CF2812(1534 kv, 140 watts), 25 amps HK esc's, an HK Quad board reflashed with the KK twincopter software and a 2.2ah 3s battery. 
Logged

Be Inquisitive
 

Read
« Reply #18 on: February 28, 2012, 05:44:35 PM »
atulrajguru9
Plane Lover
Forum Veteran
****

Reputation Power: 5 
atulrajguru9 has no influence.
Offline Offline

City: Pune
State: Maharashtra
RC Skills: Beginner
Posts: 337
Join Date: Nov, 2010



Cool, thank you for details Rohit!

Hope to see full function VTOL soon. keep us posted Smiley

Thank you,
Atul
Logged
 

Read
« Reply #19 on: April 01, 2012, 09:29:05 PM »
atulrajguru9
Plane Lover
Forum Veteran
****

Reputation Power: 5 
atulrajguru9 has no influence.
Offline Offline

City: Pune
State: Maharashtra
RC Skills: Beginner
Posts: 337
Join Date: Nov, 2010



Hey Rohit!

Hope you are doing good.

Any progress on this project? 

Thank you,
Atul
Logged
 

Read
« Reply #20 on: April 01, 2012, 10:00:44 PM »
rohitgupta322
Plane Lover
Forum Hero

*****

Reputation Power: 12 
rohitgupta322 has no influence.
Offline Offline

City: Illinois, USA
State: OUTSIDE INDIA
RC Skills: Beginner
Posts: 986
Join Date: Feb, 2010



Hi, Atul. Yes I am working on this project, it took me some time to get all those required stuffs but I have them now and I have started working on it again. Will update as soon as I find time.
Logged

Be Inquisitive
 

Read
« Reply #21 on: April 05, 2012, 09:57:24 PM »
Sethji
Scratch building a RC plane in India
Plane Lover
Active Member

**

Reputation Power: 2 
Sethji has no influence.
Offline Offline

City: Kolkata
State: West Bengal
RC Skills: Intermediate
Posts: 92
Join Date: Feb, 2010

RC plane hobbyist from Kolkata, but now in DC



Hi Rohit, we all look forward to seeing your VTOL fly/hover Smiley Keep-up the good work !
Logged

 

Read
« Reply #22 on: April 05, 2012, 10:00:37 PM »
rohitgupta322
Plane Lover
Forum Hero

*****

Reputation Power: 12 
rohitgupta322 has no influence.
Offline Offline

City: Illinois, USA
State: OUTSIDE INDIA
RC Skills: Beginner
Posts: 986
Join Date: Feb, 2010



Thank You Ritesh bhaiya, well I am looking forward to it too!
Logged

Be Inquisitive
 

Pages: [1]   Go Up
Jump to:  

Related Topics
Subject Started by Replies Views Last post
Testing the five best drones you can buy
RC Outlets and Resellers
Jash Yang 0 911 Last post August 01, 2014, 01:36:38 PM
by Jash Yang
Ground testing at the last part
Electric Planes
Aviation RC 0 677 Last post August 21, 2017, 03:08:45 AM
by Aviation RC
Helicopter Testing
Electric Planes
PraveenAaju 1 543 Last post March 07, 2018, 12:25:54 PM
by Chiragthelegend12
Ethan's BSD flux onslaught testing
Cars
F.I.M.S presents Rc 0 207 Last post June 19, 2018, 03:44:43 AM
by F.I.M.S presents Rc
need apm for testing quadcopter
Free, Donations and Sweepstakes
anilkunchalaece 2 1324 Last post July 27, 2018, 04:14:58 PM
by anilkunchalaece