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Second Time Around

Colin Budds rediscovers his love of autogyros Subscribers Only

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Tom Wright 2	24/01/2012 22:43:12
3401 forum posts 168 photos	Crane fly Autogyro. Final Assembly (checking servo arm directions). The V tail mixer fly leads are plugged into the elevator and aileron RX sockets ,then the servo leads are plugged into the pin connectors on the opposite side . Set up to produce servo arm movements that result in the rotor tri plate rotating forward when TX down elevator is applied and back with up elevator . Then check that left and right aileron stick movements results in the rotor tri plate moving side to side in the correct sense. These checks can be done before fitting the control rods ,and when complete the servos can be secured after drilling pilot holes in the servo mounting blocks ,
Tom Wright 2	24/01/2012 23:01:42
3401 forum posts 168 photos	Servos secured ,the rubber mounting blocks brass inserts and screws all come with the servos suggested for the build.
Tom Wright 2	25/01/2012 02:34:10
3401 forum posts 168 photos	Crane Fly Autogyro. Final assembly ( Making and fitting the servo to head control rods) . The usual threaded soft control rods are not long enough and not really strong enough to resist bending .Using dowel with push rods bound to the ends is cumbersome and heavy, so unless other ideas are offered we have to call on CF tube to help out . GC have 3mm diameter CF tube that has a nominal ID of 2mm, this is this is the material used for my own push rod build . QTY 2 CF tubes each 9" long QTY 4 2mm threaded ends push rod ,each 3" long QTY 2 2mm metal quick links QTY 2 ball links . Edited By Tom Wright 2 on 25/01/2012 02:36:16
Tom Wright 2	25/01/2012 17:06:39
3401 forum posts 168 photos	Crane Fly Autogyro Final assembly Control rods The threaded metal rods that have the ball links attached are coated with cyno and pushed in to the CF Tube leaving the threaded portion 10mm clear of the tube. The two rods that have the metal quick links attached are for the time being left free to push in and out of the CF to allow the roll and pitch trim set up point to be found . Edited By Tom Wright 2 on 25/01/2012 17:11:00
Tom Wright 2	25/01/2012 17:14:52
3401 forum posts 168 photos
Steve W-O	25/01/2012 17:17:32
2775 forum posts 310 photos	Posted by Tom Wright 2 on 24/01/2012 23:01:42: Servos secured ,the rubber mounting blocks brass inserts and screws all come with the servos suggested for the build. What size servos?
Tom Wright 2	25/01/2012 17:21:26
3401 forum posts 168 photos	The mixer and excess wires have been stowed in some heat shrink tube the RX and ESC are now installed .A hole is made in the floor to pass the lipo connector through to the bottom . Edited By Tom Wright 2 on 25/01/2012 17:27:31
Tom Wright 2	25/01/2012 17:25:33
3401 forum posts 168 photos
Tom Wright 2	25/01/2012 17:36:28
3401 forum posts 168 photos	HI Steve. From GC.page two as below. Cheers Tom. Edited By Tom Wright 2 on 25/01/2012 17:41:31
Tom Wright 2	25/01/2012 17:40:25
3401 forum posts 168 photos	Posted by Tom Wright 2 on 04/01/2012 15:13:06: Crane Fly Autogyro. Servo mounting blocks. Material 1/2" x 1/4" spruce (make from boom off cut) Space to suit servos 9 gram size with metal gears are recommended G C have a good selection but some are to deep ( the ones like mg90 have a bottom bearing that extends the case size). I have the Corona DS-939 MG to hand ,just right for this model. Just in case you hadn't noticed the first servo blocks are mounted directly behind the rear of the mast plates. . Edited By Tom Wright 2 on 04/01/2012 15:17:21
Tom Wright 2	25/01/2012 18:40:40
3401 forum posts 168 photos	The build to date should result in the sub assemblies as shown below.
simon burch	25/01/2012 19:52:22
477 forum posts 18 photos	Is the lipo not going in the box then ?? My build has stalled at the moment, but might get some time this weekend to finish off the head and make a start on the blades. Cheers, Simon
Tom Wright 2	25/01/2012 20:44:33
3401 forum posts 168 photos	Posted by simon burch on 25/01/2012 19:52:22: Is the lipo not going in the box then ?? Cheers, Simon HI Simon Noooooo it goes underneath. Tom.
simon burch	25/01/2012 20:53:41
477 forum posts 18 photos	Seems a shame to waste all that space but I guess it keeps it simple.
Tom Wright 2	25/01/2012 21:33:51
3401 forum posts 168 photos	Yes I know Simon but its underneath for very good reasons .....to accommodate different capacity lipos, maintaining cg ,departing the airframe in a prang and keep the vertical cg low. Cheers Tom.
Tom Wright 2	25/01/2012 23:53:24
3401 forum posts 168 photos	Crane Fly Autogyro Final assembly continued. Push rods (and setting the tri plate angles) Leaving the metal quick link rods unsecured in the CF tube allows the head/plate angles to be set up leaving plenty of adjustment on the threads to set up the flying trim . With the TX and RX switched ON (all trims at mid point) the tri plate should be set to between 5 and 7 degrees positive to the boom.Then looking from the front set the tri plate 3 degrees to the right . When this set up is achieved ,double check then mark the point were the metal rods enter the CF tube ,remove from tube, coat metal rods with cyno ,and replace up to the mark. These settings are the start point I will post the flying trim settings when my build is test flown. Edited By Tom Wright 2 on 25/01/2012 23:54:14
Tom Wright 2	26/01/2012 01:15:16
3401 forum posts 168 photos	Crane Fly Autogyro Final assembly Tail skid and tailplane The skid is 4"of 1.5 solid CF as used on the rotor l/e and t/e. Drill a 1.5mm clearance hole at 45 degrees located at approx half tail chord coat the end with cyno and insert ,A plastic tube sleeve is added as point protection. The completed tailplane can now be glued in place (PVA or cyno ) make absolutely sure its vertical and spot on square to the boom.
Tom Wright 2	26/01/2012 01:25:07
3401 forum posts 168 photos	Crane Fly Autogyro Final assembly Before installing the piano wire undercarriage fit the wheels ....I used 75mm diameter smaller is not advised.
Tom Wright 2	26/01/2012 01:33:46
3401 forum posts 168 photos	Crane Fly Autogyro Final assembly Fitting the undercarriage Locate the undecarrage as shown Glue the in fill former in place. Finally glue a piece of 1/16" ply shaped to fit the outside dimensions of the front ,epoxy or cyno is best for this job ,I used cyno . Edited By Tom Wright 2 on 26/01/2012 01:45:22
Tom Wright 2	26/01/2012 01:58:38
3401 forum posts 168 photos

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