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HelicopterTandem Rotor Craft Chinook - Osprey › tandem t-rex 600n ,mk 123456
06-06-2009 06:18 PM  8 years agoPost 1
ady

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norfolk england

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yo , well as some of you know i like to fiddle but do change my mind quite often , which ment all my previous tandems have been built , flown then split n sold on , but not no more , i now have a rappy 50 to fly and have saved up and bought myself 2 t-rex 600n this time , i`ve got different gearing as i may fit a 4 stroke this time , pic`s on the build as i go , this one will take longer due to moneys but will be worth it i hope as i learnt so much before , cheers lads for all your previous advise and its good to be back

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06-07-2009 08:54 PM  8 years agoPost 2
ady

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norfolk england

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due to some poor weather , i threw it together , front on left or should i say right ?

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06-10-2009 10:09 PM  8 years agoPost 3
ady

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norfolk england

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08-12-2009 10:35 PM  8 years agoPost 4
ady

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norfolk england

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well , its actually nearly built , the rex i was flying was landed today with a single rotor and a few hours later has a rex 700 boom n shaft fitted and 80% of the rest , awaiting parts from ebay and have purchased a multi-mixer from http://www.rc2rotors.co.uk who`s a very polite chap , just gotta locate some hitec servo horns ? this time she`ll be fitted with flybars from the start and a gyro on rudder and elevator , 550mm blades will be used to start with , pics soon

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08-13-2009 02:07 PM  8 years agoPost 5
cliffbarrimore

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Welcome Bay, Tauranga, New Zealand

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Hi Ady

that is some machine, Just had a look at the mixers too and they look good for a good price,

got me very interested, I love the chinooks have them fly over my house daily, love the sound..

I was looking at the twin rexx, but far too expensive for me, so I am looking to do something similar to your 600, but 450 or 500...

I am interested in how you are linking the rotors, I assume you are using a torque tube? I guess you have to keep them in sync some how..

did the 4 stroke work out.. all getting me quite interested

very interesting...keep us (me) posted

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08-13-2009 03:03 PM  8 years agoPost 6
ady

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norfolk england

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hello there , if you use the torque tube its easy to sync , just use the gears , one tooth at a time by turning one end and not the other so when you slide the auto gear in they don`t collide , its easier said than i can explain to be honest . this`ll be my second mixer , i sold the first and once ya get the hang of it , its very user friendly , i`ve just had a couple of hours fiddling while i await parts , must do some pics , cheers for your comments

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08-13-2009 03:17 PM  8 years agoPost 7
cliffbarrimore

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Welcome Bay, Tauranga, New Zealand

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Hi

I'm just looking on ebay and seen trex 500 clone's, I may get a couple of those and see what I can knock up...

did you use the 600 torque tube parts on the 600? Just thinking what I could use on a 500

look forward to some more pics and some more details

Cliff

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08-13-2009 03:21 PM  8 years agoPost 8
ady

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norfolk england

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i`ve used 600 parts and now a 700 torque tube n boom , makes it easier to fit 550mm main blades n paddles , can go 600mm blades but the engine won`t be happy , if you build it , you won`t regret it , they are awesome in there own right

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08-13-2009 03:24 PM  8 years agoPost 9
ady

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08-14-2009 11:48 AM  8 years agoPost 10
ady

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norfolk england

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well the mixer arrived this morning , excatly as promised all is fitted and bench tested , just need to visit the model shop later for a few more parts , and hopefully i`ll be able to get testing and setting up this weekend , cos these do take a bit of time to get right , can`t wait

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08-14-2009 05:01 PM  8 years agoPost 11
ady

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norfolk england

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she`s ready to rock

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08-14-2009 05:59 PM  8 years agoPost 12
ady

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08-14-2009 08:44 PM  8 years agoPost 13
cliffbarrimore

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Welcome Bay, Tauranga, New Zealand

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nice pics, I'll have to start saving and playing..

I hope it flies as well as it looks, I am sure it will

are you just using standard torque tube gears on the bottom of the masts, and removing the auto unit

I was thinking 2x 500's and a 600 boom, maybe shortened but use the 600 torque tube?

Cliff

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08-14-2009 09:12 PM  8 years agoPost 14
ady

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norfolk england

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i`ll take some better pics at the weekend , the front heli is normal and the rear main shaft runs thru the auto gear with sleeve , no auto bearing is required or main gear , all gears are standard that are fitted , i don`t thing the 600 boom will fit the 500 , i`ve never had a 500 torque drive so unsure if the 600 TT will fit , maybe someone else may know

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08-15-2009 09:42 AM  8 years agoPost 15
ady

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norfolk england

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she flys perfectly , more tests later today even in the strong winds we have

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08-15-2009 12:53 PM  8 years agoPost 16
cliffbarrimore

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Welcome Bay, Tauranga, New Zealand

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Glad it went well, I only get to fly sunday mornings, lucky you

Ok I think I am confusing my self here, maybe you can put me right...

I can work out how the torque tube gets the rotors working the correct way both ends,apart from mounting the bits at the wrong end of the frames but a belt drive? I assume it will need a 180 twist, which down a tail boom would not work to well!

I have to keep costs down so I think I will start with 450's and a torque tube maybe from the 500..

I'd be interested in some close up shots of the way you have the gears set on the T-tube at each end, if thats not too much to ask

thanks

Cliff

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08-15-2009 01:15 PM  8 years agoPost 17
ady

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norfolk england

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with the belt you`ll have to spin it 180 dgrees like you`ve sussed, my first attempt was a rappy 50 during the winter , so the belt kept going slack as i kept going in and out of the house to try it , close up pics ain`t far away , i`ve got a week off so i`ve been able to fiddle and also i went to the field and back before the rest of the family got outta bed have had one more go , made big adjustments to the elevator this time , but when it gets hit by the strong winds on the side its fun

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08-15-2009 01:58 PM  8 years agoPost 18
ady

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norfolk england

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the front end is bog standard rex pro , heres the rear , hope the pic`s help

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08-15-2009 09:30 PM  8 years agoPost 19
cliffbarrimore

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Welcome Bay, Tauranga, New Zealand

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Hi

thats great, thanks for that, I am going to go the 450 route first to keep cost down and now they make the 450 pro, I have a ready made shaft drive so that makes it a bit easier, then when I get the hang of it all I can upgrade.

I was wondering if its possible to 'lean' the rotors forward as per full size, dont know it would be possible to do it around the TTube gears or if it would mess up the mesh too much.

Cliff

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08-15-2009 10:16 PM  8 years agoPost 20
ady

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norfolk england

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i`ve look into leaning the front , with the electric version i was gonna put the motor at the back to keep outta the way , my local model shop said they could get me universal joint to make the front angle fairly simple , i was gonna sit the back mec`s level , tilt the front forward by 9 degrees i think it is , then make the frame inbetween before making the shaft fit , but i never got round to it , i suppose if i reverse what i have at present i could try the same , good luck and let me know how it goes

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HelicopterTandem Rotor Craft Chinook - Osprey › tandem t-rex 600n ,mk 123456
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