ChrisB Posted October 13, 2015 Share Posted October 13, 2015 Great pics linds. I particularly like the vamps but I'm bias as one was mine and one was my dad's the third was Scott's, all the way from Fife. I meant to seek you out to chat about the Blenheim. Will we see it there next year?CheersChris B Quote Link to comment Share on other sites More sharing options...
Lindsay Todd Posted October 14, 2015 Share Posted October 14, 2015 Chris, Yes, there's a challenge I have set myself then! Quote Link to comment Share on other sites More sharing options...
Gordon Whitehead 1 Posted October 14, 2015 Share Posted October 14, 2015 A big well done and thanks to Chris, Ian and the Ashbourne club for hosting a really enjoyable day’s flying for everyone. This was my first attendance at the event, having only recently moved into the area. A highlight for me was meeting Alex Whittaker, Danny Fenton and Tim Hooper whose writings keep us all well-informed and inspired by their skills and techniques. Thanks also to Danny and Lindsay for the ace pics of the Jungmeister and Tiggie. The latter is now around 14 years old and on its 3rd motor, 5th battery chemistry (nicad, nimh, saphion, A123 and lipo) and second latex pilot as the original one crumbled. Only the Schulze esc and well-worn airframe are original as the tyre wear and crazed paintwork show, but folks seemed to like its aged appearance, which I’m afraid embarrasses me somewhat as I never seem able to get around to sprucing it up. Like everyone else the Tiggie, Jungie and I are definitely looking forward to next year’s fly-in with enthusiasm! Cheers Gordon Quote Link to comment Share on other sites More sharing options...
Geoff S Posted October 14, 2015 Share Posted October 14, 2015 Gordon, for me the Tiggie was the model of the day. It certainly gave me the kick up the wotsit to get the finishing touches to my DB version restarted, particularly as mine's electricaslly powered, too. It certainly doesn't look 14 years old and you have nothing to be embarrassed about. One of the things that got me restarted was your advice/information about how the rudder closed loop was supposed to be and I've just made a suitable system which should do the job. As I'm working on a part completed airframe I was given it means a few modifications, particularly as it was the donor's first ever aircraft build! G;ad you enjoyed the day and I hope you get your gas turbine sorted for next year Geoff Quote Link to comment Share on other sites More sharing options...
Tim Hooper Posted October 14, 2015 Share Posted October 14, 2015 Posted by Geoff Sleath on 14/10/2015 22:28:41: ....your advice/information about how the rudder closed loop was supposed to be and I've just made a suitable system which should do the job. OK, spill. How's it done? tim Quote Link to comment Share on other sites More sharing options...
Geoff S Posted October 15, 2015 Share Posted October 15, 2015 Not rocket science, Tim. It was just that I thought I'd need to make up a system for for a scale(ish) rudder closed loop system with 2 levers, one poking out each side below the front cockpit. Gordon pointed out that a single long lever, pivoted in the middle, works perfectly well and I've made one out of an old piece of glass fibre PC board (I have a lot of that scrounged from my former employer, who shall remain nameless!). It's not finished yet, but I've made the whole thing from my extensive scrap box (also known as my workshop ) I'd been putting off the job but Gordon's advice (and his lovely, medium sized Tiggie) persuaded me to get started. Geoff Quote Link to comment Share on other sites More sharing options...
Gordon Whitehead 1 Posted October 15, 2015 Share Posted October 15, 2015 Hi Guys Fixed the jet, and took pics of the Tiggie control system. It's sport scale so not an exact replica. 1. Showing link from central aileron servo to aileron pushrod emulating full size setup. 2. What's under the hatch. Elevator servo top, aileron servo middle, rudder servo bottom of pic, linked to rudder bar. 3. Angled shot showing ail servo and rudder beam mount. 4. "L" section plastic fairing over rudder bar end as on real one. 5. Rudder cable guide. Nylon-covered fishing trace passes through PTFE tube which is CA'd into bracket, otherwise nylon outer wears off the cable. 6. Where all those darned cable go! Best to install the elevator cables before covering so that you can work out where they'll exit through the fabric covering, but just bend ends through ferrules and don't crimp. Then detach cables from elevator end and tuck inside fuz, cover, and then re-attach cables and crimp. 7. Cable exits stiffened with G10 "eyelets" to keep them neat. 8. Elevator cable guide bracket with PTFE tube protector. The tube is that which comes with Zap CA. 9. I thought I'd also show the elevator cable idler bar and 180deg crank operated from elevator servo. The carbon tube and horn are slotted where they intersect, and a small rectangle of tufnol inserted as a key to prevent rotation, before epoxying the joint. Servo pushrod and single-ended crank on right of pic, elevator crank in middle with up and down elevator wires at opposite ends. The crank is installed before covering. Ref the jet, the Hawk's original turbine went for servicing recently, so I'd replaced it with one which had been happily flying in another model. But I but didn't swap over the fuel control solenoid valves from the other model to the Hawk. As the replacement engine was known to be working, and as I thought all solenoid valves would be the same (they look identical), I didn't bother doing a run-up through lack of time. At Ashbourne, I discovered that not all solenoid valves are the same. It transpired that the solenoids in the Hawk were of too low a resistance to work with the replacement engine's Fadec which tried to draw too much current, and declared an "overload" and switched itself off. When I replaced the low-resistance valves with the ones that should have been used, all came right and the jet is ready to fly again with its current engine. FWIW I measured the resistances of my 3 pairs of solenoid valves. One set was 38 ohms, a second set was 28 ohms, and the "offending" set was 16 ohms. The 16 ohm valves were from a gas-start setup and worked properly with their gas-start ecu. But having upgraded to kero start, the kero Fadecs use higher-resistance solenoid valves. Fortunately, provided I use these low-resistance valves only to work the kero plug, with a low-resistance valve in the main fuel supply line, the Kero Fadec will work OK and save me lots of ££££'s. Gordon Edited By Gordon Whitehead 1 on 15/10/2015 16:09:04 Quote Link to comment Share on other sites More sharing options...
Former Member Posted October 15, 2015 Share Posted October 15, 2015 [This posting has been removed] Quote Link to comment Share on other sites More sharing options...
Geoff S Posted October 15, 2015 Share Posted October 15, 2015 Thanks, Gordon. The rudder bar I've made is very similar to yours (couldn't be much different, I suppose). The main difference is that mine still has some PC tracks still visible but they'll be hidden once it's all finished. I'm going to fit snake outers to feed the elevator closed loop wires back to the (single) elevator servo. I think it will work OK, particularly if I keep them as straight as possible. I had thought about using a servo for each elevator half but it seems to be overkill on a smallish model. With care it will be possible to get the elevators moving equally and in synchronism. Geoff Quote Link to comment Share on other sites More sharing options...
cymaz Posted October 15, 2015 Share Posted October 15, 2015 I did this on my Gipsy Moth that flew there at the weekend... Edited By cymaz on 15/10/2015 20:03:23 Quote Link to comment Share on other sites More sharing options...
Dylan Reynolds LaserCraft Services Posted October 15, 2015 Share Posted October 15, 2015 You can see some of my pics of the day here on my facebook page, they are split into ground and flying shots **LINK** **LINK** Quote Link to comment Share on other sites More sharing options...
Tim Hooper Posted October 15, 2015 Share Posted October 15, 2015 Posted by cymaz on 15/10/2015 20:00:54: I did this on my Gipsy Moth that flew there at the weekend... That's what I thought you said! Glad to make your acquaintance anyway! I've done the same as Gordon on my ongoing Tiggie with the rudder bar, so it should be all right. tim 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.