tantem t-rex with gt5

ady · 01-14-2012, 02:42 PM

Hello there , I've thrown together a tandem made from a couple of Rex 550 's , many parts are tarot tho , I'm using a helitonix mixer and another gt5 . I have had a quick garden hop in the dark but was not really the best way to try . Had to turn all the controls done by a large amount , had massive alieron pendulum effect which wasn't nice . My last tandem had the use of two futaba 401 gyro's which made it flyable on rate mode only , i'll take it to our field tomorrow for tests and pics and a lot of adjustments , will try that total gain on both white and black backgrounds

ady · 01-15-2012, 07:10 AM

ady · 01-15-2012, 07:14 AM

well she`s hovered

the elevator is a nightmare , but i`m sure i will get there , am having to fly with 0 on I on both swash and tail , gains on full all round , but its just as if the elevator gyro function isn`t working , wonder if i need some I ?

swalko · 01-15-2012, 07:17 AM

Video is private.

ady · 01-15-2012, 07:18 AM

swalko · 01-15-2012, 08:03 AM

Quote:

Originally Posted by ady

well she`s hovered

the elevator is a nightmare , but i`m sure i will get there , am having to fly with 0 on I on both swash and tail , gains on full all round , but its just as if the elevator gyro function isn`t working , wonder if i need some I ?

Yes, you need I. I hold heli on its position, with I = 0 you get rate mode as you asked, i do not recommended you to try rate mode on cyclic

. Please set your video as public, i am interrested.

ady · 01-15-2012, 08:29 AM

hi , the video is now public , why it went private ? anyhow , i`m gonna try turning I up on the swash in small adjustments , my former tandems never liked HH on the swash plates tho , it makes for something different to the norm , just gotta dial her in

ady · 01-15-2012, 08:42 AM

what i`m trying to work out that once switched on you can see no gyro compensation on the elevator , on my pro , you can see the gyro working , on the tandem i can`t ? the unit works thru the helitronix mixer , elevator is thru DCP mix , so to move forward , the rear swash lifts and the front drops , the tail/yaw is very easy to see

ady · 01-17-2012, 12:27 PM

good evening everyone , i have factory reset the unit , set the usual in the gt unit and have turned off the I setting in the tail to make that rate mode, i have left the unit in NITRO , do you you thing this helps with vibration , the reason is , at the weekend , i could not get it off the deck without the swashes cranking over , i`ve done a bench run , with a different foam , this time the swashes do not move , i`ve also removed the skid tubes . so on the filter front , is 0 or is it 5 for best vibration filtering please

ady · 01-17-2012, 12:28 PM

YouTube

swalko · 01-17-2012, 01:44 PM

Based on the info from manual v2 strongest vibration filter is 0.

ady · 01-17-2012, 02:41 PM

Cheers , just needed to read it again , the hover or Hoover setting as they put it , 5 is max ?

mrultralite · 01-17-2012, 02:43 PM

I'm a newbie ignoramous but the head speed seems really high [feel free to ignore]

ady · 01-17-2012, 03:25 PM

Hi , the bench headspeed with no load sounds worse than it is but if you mean the hover video , the headspeed I'm working on , the 520 blades needed some speed to get lift , on earlier versions , I used larger blades but that loaded the little umbrella gear to much and stripped , i'll never ignore any comment cos you might spot something I may miss

swalko · 01-17-2012, 03:43 PM

Quote:

Originally Posted by ady

Cheers , just needed to read it again , the hover or Hoover setting as they put it , 5 is max ?

Yes 5 is maximum stability.

Jomaba4308 · 01-17-2012, 04:19 PM

How do you get the timing right between the heads so the blades don't hit each other?

Sent from my C771 using Tapatalk

ady · 01-18-2012, 02:01 AM

hi , they are set 90 degrees apart , and unless the gears strip , they`ll not hit

ady · 01-20-2012, 03:20 PM

hi , i`m just not able to get the gt5 to work on my tandem , so have removed it and fitted csm 720 gyros , so i`ll close this thread now , thanks for all your help , and i`ll still be posting my 600rpo findings as i go along . just need another heli to fit the other gt5 to now

01-14-2012, 02:42 PM	#1
ady Registered Users Join Date: Dec 2007 Location: norwich , norfolk , uk	tantem t-rex with gt5 Hello there , I've thrown together a tandem made from a couple of Rex 550 's , many parts are tarot tho , I'm using a helitonix mixer and another gt5 . I have had a quick garden hop in the dark but was not really the best way to try . Had to turn all the controls done by a large amount , had massive alieron pendulum effect which wasn't nice . My last tandem had the use of two futaba 401 gyro's which made it flyable on rate mode only , i'll take it to our field tomorrow for tests and pics and a lot of adjustments , will try that total gain on both white and black backgrounds

01-15-2012, 07:18 AM	#5
ady Registered Users Thread Starter Join Date: Dec 2007 Location: norwich , norfolk , uk	Attached Thumbnails

01-17-2012, 04:19 PM	#16
Jomaba4308 Registered Users Join Date: Nov 2010 Location: Connecticut, US	How do you get the timing right between the heads so the blades don't hit each other? Sent from my C771 using Tapatalk __________________ MSH Protos 500 GT-5 FBL, Trex 450 Pro 3G FBL, TT Mini Titan v1, Blade MCP-X & Nano CPX, Blade 130x. - Spektrum DX8

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

01-15-2012, 07:10 AM	#2
ady Registered Users Thread Starter Join Date: Dec 2007 Location: norwich , norfolk , uk

01-15-2012, 07:14 AM	#3
ady Registered Users Thread Starter Join Date: Dec 2007 Location: norwich , norfolk , uk	well she`s hovered the elevator is a nightmare , but i`m sure i will get there , am having to fly with 0 on I on both swash and tail , gains on full all round , but its just as if the elevator gyro function isn`t working , wonder if i need some I ?

01-15-2012, 07:17 AM	#4
swalko Registered Users Join Date: Aug 2009 Location: Slovakia	Video is private.

01-15-2012, 08:29 AM	#7
ady Registered Users Thread Starter Join Date: Dec 2007 Location: norwich , norfolk , uk	hi , the video is now public , why it went private ? anyhow , i`m gonna try turning I up on the swash in small adjustments , my former tandems never liked HH on the swash plates tho , it makes for something different to the norm , just gotta dial her in

01-15-2012, 08:42 AM	#8
ady Registered Users Thread Starter Join Date: Dec 2007 Location: norwich , norfolk , uk	what i`m trying to work out that once switched on you can see no gyro compensation on the elevator , on my pro , you can see the gyro working , on the tandem i can`t ? the unit works thru the helitronix mixer , elevator is thru DCP mix , so to move forward , the rear swash lifts and the front drops , the tail/yaw is very easy to see

01-17-2012, 12:27 PM	#9
ady Registered Users Thread Starter Join Date: Dec 2007 Location: norwich , norfolk , uk	good evening everyone , i have factory reset the unit , set the usual in the gt unit and have turned off the I setting in the tail to make that rate mode, i have left the unit in NITRO , do you you thing this helps with vibration , the reason is , at the weekend , i could not get it off the deck without the swashes cranking over , i`ve done a bench run , with a different foam , this time the swashes do not move , i`ve also removed the skid tubes . so on the filter front , is 0 or is it 5 for best vibration filtering please

01-17-2012, 01:44 PM	#11
swalko Registered Users Join Date: Aug 2009 Location: Slovakia	Based on the info from manual v2 strongest vibration filter is 0.

01-17-2012, 02:41 PM	#12
ady Registered Users Thread Starter Join Date: Dec 2007 Location: norwich , norfolk , uk	Cheers , just needed to read it again , the hover or Hoover setting as they put it , 5 is max ?

01-17-2012, 02:43 PM	#13
mrultralite Registered Users Join Date: Jun 2011 Location: Abbotsford BC canada	I'm a newbie ignoramous but the head speed seems really high [feel free to ignore]

01-17-2012, 03:25 PM	#14
ady Registered Users Thread Starter Join Date: Dec 2007 Location: norwich , norfolk , uk	Hi , the bench headspeed with no load sounds worse than it is but if you mean the hover video , the headspeed I'm working on , the 520 blades needed some speed to get lift , on earlier versions , I used larger blades but that loaded the little umbrella gear to much and stripped , i'll never ignore any comment cos you might spot something I may miss

01-18-2012, 02:01 AM	#17
ady Registered Users Thread Starter Join Date: Dec 2007 Location: norwich , norfolk , uk	hi , they are set 90 degrees apart , and unless the gears strip , they`ll not hit

01-20-2012, 03:20 PM	#18
ady Registered Users Thread Starter Join Date: Dec 2007 Location: norwich , norfolk , uk	hi , i`m just not able to get the gt5 to work on my tandem , so have removed it and fitted csm 720 gyros , so i`ll close this thread now , thanks for all your help , and i`ll still be posting my 600rpo findings as i go along . just need another heli to fit the other gt5 to now