john stones 1 - Moderator Posted January 21, 2017 Share Posted January 21, 2017 I don't doubt you'll solve your servo issue, neither do i doubt you'll spend whatever it takes to do it right. I've even less doubt that no one in our club is more suited to a Taranis and has used the daftest reasons not to buy one, no sympathy for you myself John Quote Link to comment Share on other sites More sharing options...
Gary Manuel Posted January 21, 2017 Author Share Posted January 21, 2017 I'm still thinking / researching the best way to sort the servo problem. In the mean-time, I've turned my attention to the silencer mounts. There are a few clamps / brackets around that will do the job of clamping / vibration damping / allowing cooling air to pass. This is the Krumscheid system. It looks good, but it looks as though they are made to fit a specific Krumscheid silencer with little adjustment. Mine are MTW, which might be slightly different diameter. This is the MTW system. Cheap and cheerful. I think it's made of wood. This is the Secraft system. I like this, but I don't like the price, bearing in mind that I need four of them. I've decided to make my own. Mainly for the challenge, but it will also save me a bit of money, that I can put towards a Powerbox maybe. I already have some of THIS, but I've ordered another length to make sure I've got enough. Here's the first one, which I'm happy with. Three more to make. Quote Link to comment Share on other sites More sharing options...
john stones 1 - Moderator Posted January 21, 2017 Share Posted January 21, 2017 They look good to go Gary, can't fault you, price of those Seacraft ones is a joke. John Quote Link to comment Share on other sites More sharing options...
Adrian Smith 1 Posted January 21, 2017 Share Posted January 21, 2017 Now that's what I can making a model. I wish I had those metal work skills. What do you think the AUW to be? Hope you have got a big area to fly in! Quote Link to comment Share on other sites More sharing options...
Gary Manuel Posted January 21, 2017 Author Share Posted January 21, 2017 The hardest part was the CAD drawing to make the paper template which I stuck to the Aluminium. The cutting was all done on a fret saw - fairly easy really. Had to drill a hole in the centre and pass the saw blade through the hole to start with. I've made 2 with a 90 degree bend, which will be the rear end supports - screwed to the top face of the tunnel. The other two mounts will be side by side on a single flat plate. This will be fastened across the tunnel mouth from the front. I've made the paper template and will cut it out tomorrow. Cant finish it because I have run out of tubing. Edit. I'm hoping the AUW will be under 14Kg. Edited By Gary Manuel on 21/01/2017 19:15:22 Quote Link to comment Share on other sites More sharing options...
Gary Manuel Posted January 21, 2017 Author Share Posted January 21, 2017 I think that THESE might solve my servo matching problems. I'd also need one of THESE for programming the MicroMatches. Bear in mind that I already have a JR RD922 Powersafe receiver, which provides redundancy in the power supplies and 3 separate satellite receivers. My only problem is that I have no means of providing the servo matching for the duel servo ailerons and rudder. My thinking is to have one MicroMatch mounted in each wing, reducing the number of field connections I need to make. I might get away without using one for rudder servo matching because my transmitter CAN do that. Any thoughts? Quote Link to comment Share on other sites More sharing options...
john stones 1 - Moderator Posted January 21, 2017 Share Posted January 21, 2017 Yes, you sure you can't slave aux channels ? Quote Link to comment Share on other sites More sharing options...
cymaz Posted January 22, 2017 Share Posted January 22, 2017 Posted by Gary Manuel on 21/01/2017 22:03:46: I think that THESE might solve my servo matching problems. I'd also need one of THESE for programming the MicroMatches. Bear in mind that I already have a JR RD922 Powersafe receiver, which provides redundancy in the power supplies and 3 separate satellite receivers. My only problem is that I have no means of providing the servo matching for the duel servo ailerons and rudder. My thinking is to have one MicroMatch mounted in each wing, reducing the number of field connections I need to make. I might get away without using one for rudder servo matching because my transmitter CAN do that. Any thoughts? That would seem to fit the bill, Gary. I will see if anyone else has used one on the interweb. Here . They weren't out when I bought my PowerBox. I would have most probably got some...a cheaper alternative. Edited By cymaz on 22/01/2017 07:05:54 Edited By cymaz on 22/01/2017 07:08:02 Quote Link to comment Share on other sites More sharing options...
Rich too Posted January 22, 2017 Share Posted January 22, 2017 Posted by Gary Manuel on 21/01/2017 22:03:46: I think that THESE might solve my servo matching problems. I'd also need one of THESE for programming the MicroMatches. Bear in mind that I already have a JR RD922 Powersafe receiver, which provides redundancy in the power supplies and 3 separate satellite receivers. My only problem is that I have no means of providing the servo matching for the duel servo ailerons and rudder. My thinking is to have one MicroMatch mounted in each wing, reducing the number of field connections I need to make. I might get away without using one for rudder servo matching because my transmitter CAN do that. Any thoughts? What about the JR matchbox? That's what I was thinking of using. Edited By Rich2 on 22/01/2017 08:02:12 Quote Link to comment Share on other sites More sharing options...
Gary Manuel Posted January 22, 2017 Author Share Posted January 22, 2017 Posted by john stones 1 on 21/01/2017 23:12:40: Yes, you sure you can't slave aux channels ? You can only Master / Slave the 4 main ones. What you CAN do is set any of them up as a programmable mix. I've actually had 4 channels moving from the Aileron stick. The problem is that only the proper Aileron channels respond to the aileron trim - the mix generated ones don't. This means that you could set the servo matching up, but as soon as you touch the trim, they would be unmatched again. Posted by Rich2 on 22/01/2017 08:01:10: What about the JR matchbox? That's what I was thinking of using. Nothing wrong with them. They do the same job but the PowerBox MicroMatches are a lot cheaper - probably because they have replaced the adjustment buttons / dial by a separate USB or Bluetouth dongle and PC or phone App. Edit - I've ordered them. I'll report back if / how well they work. Edited By Gary Manuel on 22/01/2017 11:26:57 Quote Link to comment Share on other sites More sharing options...
john stones 1 - Moderator Posted January 22, 2017 Share Posted January 22, 2017 Right i follow now, annoying aint it coming up against the trim switch one John Quote Link to comment Share on other sites More sharing options...
Gary Manuel Posted January 22, 2017 Author Share Posted January 22, 2017 Posted by john stones 1 on 22/01/2017 14:07:42: Right i follow now, annoying aint it coming up against the trim switch one John Annoying and expensive. Quote Link to comment Share on other sites More sharing options...
Gary Manuel Posted January 22, 2017 Author Share Posted January 22, 2017 Front silencer bracket made. Looks like fibre glass in the photo, but it's Aluminium. I've only got enough tubing to do one side and even then the lengths are a bit short and not straight. I'll redo all of these when postman delivers the tube I've ordered. Air outlet opened up at the rear of the tunnel. While I've got the iron out, I'll make a lip for the front of the tunnel outlet to create a low pressure area. My thinking here is to try to suck air out from the rear to help the air being pushed in at the front. Job done. Quote Link to comment Share on other sites More sharing options...
Gary Manuel Posted January 22, 2017 Author Share Posted January 22, 2017 Rear silencer brackets fitted ...... ... and the front one. This photo explains the weird shape of the bracket - to let as much engine / silencer cooling air through as possible Trial fit of a silencer viewed from the front ..... .... and the rear. Quote Link to comment Share on other sites More sharing options...
Gary Manuel Posted January 22, 2017 Author Share Posted January 22, 2017 Double knuckle header held in position and adjusted to give the best alignment. I kept the header at full length at this stage to help align it with the centre of the front and rear brackets ..... .... but I did mark the length to cut the header to, leaving a 5mm gap. After carefully removing the header to prevent it moving The two knuckle joints were silver soldered. The knuckle joints are a fairly tight fit, and showed no sign of wanting to move. Silver soldering was a lot easier than I expected. Propane gas torch had no difficulty at all heating the pipework up. Silencer and header installed to make sure that nothing had moved. Trial fit looks good to me Quote Link to comment Share on other sites More sharing options...
Rich too Posted January 22, 2017 Share Posted January 22, 2017 Nice work, I thought about making my own headers but I'm not as skilled as you Quote Link to comment Share on other sites More sharing options...
Gary Manuel Posted January 22, 2017 Author Share Posted January 22, 2017 I was a bit scared of silver soldering but having done it now, I would say that if you can solder, you can silver solder. Quote Link to comment Share on other sites More sharing options...
john stones 1 - Moderator Posted January 22, 2017 Share Posted January 22, 2017 Nice work Gary, satisfying eh John Quote Link to comment Share on other sites More sharing options...
Gary Manuel Posted January 22, 2017 Author Share Posted January 22, 2017 Posted by john stones 1 on 22/01/2017 19:21:23: Nice work Gary, satisfying eh John Yep - well worth the effort. I'm on a roll now. Off to do the other side. Quote Link to comment Share on other sites More sharing options...
Gary Manuel Posted January 22, 2017 Author Share Posted January 22, 2017 Blue tubing moved to the other side for a trial fit. All lined up ready for silver soldering. Blue tubing cut in half for a trial fit of both sides together. It's noticeable that one side is different to the other - presumably due to the stagger of the cylinders Rear end. Now to remove it all so I can install the throttle servo and choke. One thing I like about this engine is the choke mechanism. There's a lever on each end which are staggered by 90 degrees (see the red arrows in the photo). This gives the option of operating the choke using a servo rod / manual rod from either: Top / bottom using the left hand lever. Front / rear using the right hand lever. Quote Link to comment Share on other sites More sharing options...
Gary Manuel Posted January 24, 2017 Author Share Posted January 24, 2017 The PowerBox MicroMatches and USB adapter have arrived. I only ordered them on Sunday. How's that for service. They even came with a little packet of PowerBox Systems Aeroplane Shaped Wine Gums. Quote Link to comment Share on other sites More sharing options...
Adrian Smith 1 Posted January 24, 2017 Share Posted January 24, 2017 Yup Gary, they are top notch for service. All these German exporters are going to be desperate to hang on to the UK market after Brexit!! Quote Link to comment Share on other sites More sharing options...
Gary Manuel Posted January 24, 2017 Author Share Posted January 24, 2017 I actually ordered them from Nexus. Quote Link to comment Share on other sites More sharing options...
Gary Manuel Posted January 25, 2017 Author Share Posted January 25, 2017 I've had a play with the MicroMatches and I'm very impressed. This is definitely the right solution to my little problem. Servo centre position and both endpoints can be individually adjusted on both servos - no need to adjust sub-trims or end points on the tranny. Should make servo matching a doddle. Not ready to try it on an actual working surface yet, but I'm sure it will be straight forward. P.S. "Powerbox Terminal" program for the USB adapter doesn't work with Windows XP (needs .NET framework 4.5), but is OK with >= Windows 7. Quote Link to comment Share on other sites More sharing options...
Gary Manuel Posted January 26, 2017 Author Share Posted January 26, 2017 Batteries, Receiver, Switch and servos tested. All looking good. I had the choice of using the power plugs supplied with the PowerSafe receiver, or converting the receiver to suit the battery. I went for the latter as my charger is set up for XT60s. Servos are good for 8.4 Volts, allowing me to use unregulated 2 cell LiPo's Throttle servo and ball joint linkage set up. Low throttle: High throttle: Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.