Stephen Grigg Posted February 1, 2011 Share Posted February 1, 2011 I bought an old Wot $ Mk2 a year ago stuck a new OS 46 La and flew it as a winter hack.The main problem was it would turn sharp right on take off,towards the trees so it was always jolly exciting.it seemed to get worse evey time I flew it so confined it to the shed.I wanted a Winter hack so retrieved it,changed the u/c as I felt its problem may lie there.Fitted a new OS 40 FP I bought before christmas off E bay.and it only needs 2 small jobs tomorrow to complete it.The rudder was very bent when I bought it and I glued a piece of hard wood down one side that cured the bend.Will this affect the aero dynamics and handling of the model.Should I fit a similar piece the other side and shape them to a wedge? Quote Link to comment Share on other sites More sharing options...
Biggles' Elder Brother - Moderator Posted February 2, 2011 Share Posted February 2, 2011 Could the temporary rudder repair not be the cause of the take off swing Stephen? What side of the rudder is the hardwood on? BEB Quote Link to comment Share on other sites More sharing options...
Martin Harris - Moderator Posted February 2, 2011 Share Posted February 2, 2011 I'd just make a new rudder, Stephen.Edited By Martin Harris on 02/02/2011 00:45:19 Quote Link to comment Share on other sites More sharing options...
Myron Beaumont Posted February 2, 2011 Share Posted February 2, 2011 You can probably buy one ( genuine replacement ) for about £50 from the maker/bodger . I've read of peeps spending almost more on replacement parts than the whole thing !!! Cost of wood for a rudder ? 1 P ?? Grumpy Quote Link to comment Share on other sites More sharing options...
Stephen Grigg Posted February 2, 2011 Author Share Posted February 2, 2011 No the right turn was there before I modified th rudder.I look at whats involved in changing the rudder.I have some spares Quote Link to comment Share on other sites More sharing options...
Martin Harris - Moderator Posted February 2, 2011 Share Posted February 2, 2011 Did it yaw or bank? Quote Link to comment Share on other sites More sharing options...
ken anderson. Posted February 2, 2011 Share Posted February 2, 2011 stephen----it wont effect the take off run....once the model is rolling - if it try's to turn off...catch it with the rudder....and when it's got enough speed the flow of air should keep it tracking straight.......it's a lot to do throttle/rudder and elevator when attempting to get off the ground in a matter of second's......the only way the undercarriage will really bite in-is if it's out a lot.......so back to your bit of wood stiffner.....that'll not effect it......normally what give's people prob's is if they let the model go where it want's and also if the take off run is too slow...... hope that help's you..... ken anderson ne...1. Quote Link to comment Share on other sites More sharing options...
Plummet Posted February 2, 2011 Share Posted February 2, 2011 Posted by Myron Beaumont on 02/02/2011 06:25:05:You can probably buy one ( genuine replacement ) for about £50 from the maker/bodger . I've read of peeps spending almost more on replacement parts than the whole thing !!! Cost of wood for a rudder ? 1 P ?? Grumpy Perhaps he is into retail therapy? Blush Plummet Quote Link to comment Share on other sites More sharing options...
Martin Harris - Moderator Posted February 2, 2011 Share Posted February 2, 2011 If it's turning as soon as it leaves the ground but flying in trim once you've avoided the trees, the likelihood is that you have some compensation held in for undercarriage misalignment, asymetric wheel drag or tailwheel/skid misalignment. This may be subconscious. Quote Link to comment Share on other sites More sharing options...
Stephen Grigg Posted February 2, 2011 Author Share Posted February 2, 2011 No amount of rudder would cure the problem ,I even tried with left rudder to start with,.The moment it was in the air it was fine.,just had to miss things the right turn had aimed it for Quote Link to comment Share on other sites More sharing options...
Jimbo565 Posted February 2, 2011 Share Posted February 2, 2011 Stephen, I'm with Martin here,is the starboard wheel turning freely,if the wheel is binding it will drag the model right.Jim Quote Link to comment Share on other sites More sharing options...
Ernie Posted February 2, 2011 Share Posted February 2, 2011 hi guys, I reckon you are all missing one essential point. ALL, yes all model aircraft are attracted by trees. You have to breath on them in a very special way if you want them to avoid them ernie Quote Link to comment Share on other sites More sharing options...
r6dan Posted February 2, 2011 Share Posted February 2, 2011 What a ripmax off for a rudder!! for fifty English pounds I will cast you a gold rudder using fire and brimstone! Quote Link to comment Share on other sites More sharing options...
Stephen Grigg Posted February 2, 2011 Author Share Posted February 2, 2011 I have rudders from other models but as its only a hack will try and modify the present one somehow first.Having changed the u/c I have eliminated any wheel that might be sticking. Quote Link to comment Share on other sites More sharing options...
Plummet Posted February 2, 2011 Share Posted February 2, 2011 Just asking a silly question... If not re-tail therapy, then what about cross-wind.. I know that at some flying sites there are laid-out runways, at others, a patch. At the latter, you can take off into the wind. At the former, the take-off direction is fixed. At a full-sized light aircraft field I have seen something similar - the settings that take the aircraft straight along the runway are not adequate after takeoff when the "wind gets under the wing", and the aircraft suddenly banks away from the crosswind. (I do not know how the pilot and instructor felt, but I had a moment of panic watching.) I chatted to the instructor later, and he said that standard practice was to add a bit of aileron in anticipation of this. Steer with the rudder on the ground, but to be ready at lift off. Could this be some of the problem? Is the prevailing wind at your site a cross wind to any extent? Plummet Quote Link to comment Share on other sites More sharing options...
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