cymaz Posted April 10, 2014 Share Posted April 10, 2014 Trago Mills is a small chain of department stores in Cornwall and one in Devon For closed loop, Danny, I use this or similar Quote Link to comment Share on other sites More sharing options...
Danny Fenton Posted April 10, 2014 Author Share Posted April 10, 2014 Hi Nigel, yes the arms are a standard fitment on those servos. They do as you have noticed several different types, from circular to four or six pringed stars. If you look carefully on the underside of the arms one leg will be numbered 1 sometimes all the arms are numbered 1 to x. What you will find is that as you turn the output disc/arm on the spline, at each arm the splines will be a slightly different angle. The idea is that you centre the servo then turn the output disk/arm until it is exactly perpendicular to the direction the servo needs to push/pull. Once you have found this angle I tend to chop the unused arms off as they get in the way of travel. It is sometimes a problem when you have three servos across a fus to keep them out of each others way. I am not certain here but I reckon a servo generally has about 45 degrees of travel each way, the transmitters are often set to use a 100% of this travel but you can often set the tx to give anything up to 125% this gives more like 50 - 60 degrees of travel each way. You can obviously reduce this too however be careful when you reduce the travel because you are also reduceing the resolution or the increments of the servo. Ideally you want to set your servo and horn arms so that full servo travel is used to deliver the max amount of travel you will need. The rates switch allows you to select a percentage of that full travel. So on low rates you may only get 75% of your max travel. Clear as mud? Some of the more technical modellers can dive in if they want but that is my understanding and how I deal with servo travel. Cheers Danny Quote Link to comment Share on other sites More sharing options...
Danny Fenton Posted April 10, 2014 Author Share Posted April 10, 2014 Thanks Cymaz, I just ordered several rolls of something very similar I ordered 20, 30, 50 and 75lb I had used my last bit on Bisto anyway so now I am sorted for a while to come. Cheers Danny Quote Link to comment Share on other sites More sharing options...
Nigel Day Posted April 11, 2014 Share Posted April 11, 2014 But was it as cheap as we can get it in Trago Danny? Amazing place. Think of a place that's a cross between Grace Brothers, Arkwright's and and old-fashioned ironmongers and you won't be far off I reckon. Thanks for the servo info. I've just created the servo fitting 'area' using the four and six-point stars. Once I've fitted everything up with the working fin and tailplane I can remove the unwanted arms. Nigel Quote Link to comment Share on other sites More sharing options...
Chris Bott - Moderator Posted April 11, 2014 Share Posted April 11, 2014 This is what I've been using for closed loops, particularly for lighter models. It's a Kevlar thread and it doesn't stretch. It's easy to knot and the knots really soak up thin cyano. I made a loop in a short length of bicycle spoke to tie it to each end. There's 25lb and 40lb versions available. Quote Link to comment Share on other sites More sharing options...
Danny Fenton Posted April 12, 2014 Author Share Posted April 12, 2014 Well unfortunately the maiden didn't happen, the camera crew (Roisin 6) practised filming Chris flying his model, but the lightly loaded Bistormer was getting blown over just sitting on the ground! So discretion was the order of the day and I took it home again. We did test the on board camera on Chris's winter hack, which worked well Busy tomorrow so probably wont happen until one lunch time next week Budding RCM&E photographer? Thanks to Chris for the great pics Cheers Danny Quote Link to comment Share on other sites More sharing options...
jolliffee Posted April 12, 2014 Share Posted April 12, 2014 It looks great, I do like the colour scheme too Quote Link to comment Share on other sites More sharing options...
Nigel Day Posted April 12, 2014 Share Posted April 12, 2014 I hate to break the bad news Danny, but someone's stolen your pilot! Quote Link to comment Share on other sites More sharing options...
Phil Winks Posted April 12, 2014 Share Posted April 12, 2014 Thats a lovely sleek looking Bi-Stormer looking forward to seeing her at grenacres Quote Link to comment Share on other sites More sharing options...
Danny Fenton Posted April 12, 2014 Author Share Posted April 12, 2014 Posted by jolliffee on 12/04/2014 16:17:28: It looks great, I do like the colour scheme too Thanks It is growing on me, some lettering and stickers will live it up but that can wait Cheers Danny Quote Link to comment Share on other sites More sharing options...
Danny Fenton Posted April 12, 2014 Author Share Posted April 12, 2014 Posted by Nigel Day on 12/04/2014 16:58:58: I hate to break the bad news Danny, but someone's stolen your pilot! Ahh he was sat in the car, realising the weather was unsuitable for taking to the skys Cheers Danny Quote Link to comment Share on other sites More sharing options...
Danny Fenton Posted April 12, 2014 Author Share Posted April 12, 2014 Posted by Phil Winks on 12/04/2014 17:06:33: Thats a lovely sleek looking Bi-Stormer looking forward to seeing her at Greenacres Thanks Phil I am looking forward to a bit of formation flying with its parasol cousins Hence my not wishing to chance the weather needlessly Cheers Danny Quote Link to comment Share on other sites More sharing options...
Danny Fenton Posted April 14, 2014 Author Share Posted April 14, 2014 Well the weather was lovely so I thought I would get the maiden out of the way. Usually I am quite excited about maidens with a touch of trepidation. This one looks right so I was actually excited and very keen, that's a first! A range test showed no issues, as I was expecting, I checked everything was secure and fitted the cowl lid. The model was wheeled onto the runway, and the the 8088 camera was mounted on the side of the fus with a length of electrical tape. With a quick scan of the airfield to ensure I was clear and a quick check with Chris my spotter that he was ready with his camera, I eased the throttle forward, it tracked nice and straight, the tail came up quickly and it took just a gentle back pressure to have her climbing gently. A little more power and a sweeping turn to the left to clear the sun at the end of the runway. I then fed in three or four clicks of down, and two clicks of right aileron. I then had a really enjoyable fly around, including the most lovely loop, so round! I lined her up and she slowed down nicely, flaring at the last minute had a lovely landing near to our feet. The camera was stopped and removed. I then flew again, and in total we got over 15 mins out of a 2300 A123 pack, though I only got 2000 mAh out of it (the cells are quite old even though the pack was just assembled). We then charged and had another 10 minute flight with Chris having a go, general consensus, absolutely vice less, a joy to fly. I will edit the on board video and post it later, here is one of Chris's photos as a taster, thanks Chris A really nice model Cheers Danny Quote Link to comment Share on other sites More sharing options...
Tony Bennett Posted April 14, 2014 Share Posted April 14, 2014 congratulations sir, beautiful model flown beautifully. Quote Link to comment Share on other sites More sharing options...
john stones 1 - Moderator Posted April 14, 2014 Share Posted April 14, 2014 Well done Danny, nice photo Quote Link to comment Share on other sites More sharing options...
Danny Fenton Posted April 14, 2014 Author Share Posted April 14, 2014 A big thanks to Chris for the brilliant pics, you wait until you see the rest Quote Link to comment Share on other sites More sharing options...
Chris Bott - Moderator Posted April 14, 2014 Share Posted April 14, 2014 Congrats Danny, that was one of the most uneventful maidens I've witnessed in a very long time. She looks just lovely in the early evening light too. What a lovely model. Danny was kind enough to let me have a stir of the sticks, and for a model straight off the board she's just viceless. Maybe the tiniest bit twitchy in roll, but that's easily sorted with a bit less throw or some more expo. Oodles of power, but nicely controlled so a gentle "pootle" around is just dead easy. One thing that did surprise me was that without down or side-thrust, opening up the taps really didn't change the trim much. Maybe some of that is down to the wings drag being both above and below the thrustline? Anyway - enough babbling on, here is a slideshow of some of this evening's still photos. There's a short vid to follow too. Quote Link to comment Share on other sites More sharing options...
john stones 1 - Moderator Posted April 14, 2014 Share Posted April 14, 2014 Excellent Chris Needs a pilot in Danny Quote Link to comment Share on other sites More sharing options...
Chris Bott - Moderator Posted April 14, 2014 Share Posted April 14, 2014 Here we go - a quick "from the cockpit" (Shame video puts pounds on you - that's my excuse anyway). Quote Link to comment Share on other sites More sharing options...
Tim Hooper Posted April 14, 2014 Share Posted April 14, 2014 What a beautiful model - so excellently photographed too! tim Quote Link to comment Share on other sites More sharing options...
Danny Fenton Posted April 15, 2014 Author Share Posted April 15, 2014 Thanks Tim the photography is down to Chris the design Mr Boddington, I just followed the lines One more pic now that some lettering has been cut That's one ready for Greenacres at least Cheers Danny Quote Link to comment Share on other sites More sharing options...
Martyn K Posted April 15, 2014 Share Posted April 15, 2014 Very nice Danny M Quote Link to comment Share on other sites More sharing options...
Nigel Day Posted April 15, 2014 Share Posted April 15, 2014 Wonderful Danny. Quote Link to comment Share on other sites More sharing options...
jolliffee Posted April 15, 2014 Share Posted April 15, 2014 That is a beauty Danny, you have done a great job with her! Quote Link to comment Share on other sites More sharing options...
Danny Fenton Posted April 15, 2014 Author Share Posted April 15, 2014 Thanks chaps, still a bit plain, but I kinda like it that way Roll on Greenacres Cheers Danny Quote Link to comment Share on other sites More sharing options...
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