Steve Jones 2 Posted December 31, 2023 Share Posted December 31, 2023 Alternative rudder servo position fir closed loop .. and tail with rudder horn Quote Link to comment Share on other sites More sharing options...
Steve Jones 2 Posted January 1 Share Posted January 1 A bit more progress 🤟motor mount done Quote Link to comment Share on other sites More sharing options...
Chris Dowell Posted January 3 Share Posted January 3 I am a little surprised that you have still gone with an of center motor. I have found that a central motor mount on my modified Mantis and my own WA 116 design, there is no noticeable difference ? I could put this down to my modest expert skilled flying capability......(but I very much doubt that.) or the fact that it does not make a great deal of difference? Quote Link to comment Share on other sites More sharing options...
Piers Bowlan Posted January 3 Share Posted January 3 I should start by saying I have never built an autogyro so maybe I shouldn’t comment but presumably the motor offset from the model’s centreline is to counteract yaw as a result of the slipstream effect from the pusher prop on the fin and rudder? Could you not achieve the same fix by introducing a few degrees of motor side thrust rather than offsetting the entire motor? Just a thought. Quote Link to comment Share on other sites More sharing options...
Richard Harris Posted January 3 Author Share Posted January 3 (edited) Chris, It is something I've not experimented with much, when I have I needed quite a lot of side thrust to compensate the yaw effect generated and it looked a bit daft if I'm honest. That said, this was with lower KV motors swinging larger diameter low pitch props with a shorter tail to CG moment arm. If you do try it let me know how it works out? the beauty of you experienced beta builders are you always throw in excellent ideas. It's no problem for me to change things to the plan at this stage so I am all ears, simpler the better in my eyes. Piers, Yes, that how I have always understood it, there are several ways to overcome the propwash effect. Offsetting the motor is the easiest way of getting around this as it keeps the thrustline square on through all of the power range (this helps when the rotors are off loaded with reduced airspeed). You can also add a variable rudder trim mixed with throttle, Micromold tried to get around it by shaping the fin/ rudder into a flat bottomed aerofoil. Edited January 3 by Richard Harris Quote Link to comment Share on other sites More sharing options...
Richard Harris Posted January 7 Author Share Posted January 7 Not sure whats going on but I keep getting a pop up box appear, strange. Anyway, I got out again today for my first fly of the year. The new motor mount is now fitted, had to move the motor up a tad as it was pitching up a bit under power. There was virtually no wind so I could confidently fly it at close quarters once trimmed. The flight was a good 8 mins long according to my unedited footage which is encouraging. There was about about 30% left in the battery, that's with me flying it in an autogyro fashion and not like a pylon racer. It's pretty much dialled in now so time for me to sit back and see if the Beta testers models reflect the same excellent flying qualities of mine. Here is today's vid, enjoy. Rich 2 Quote Link to comment Share on other sites More sharing options...
Steve Jones 2 Posted January 7 Share Posted January 7 Nearly there .. a few screws and a prop and final balance . Maiden will be next weekend if the weather plays ball 2 Quote Link to comment Share on other sites More sharing options...
Chris Dowell Posted January 8 Share Posted January 8 Nice one Steve .That one really pops Rich Modified motor mount?? Quote Link to comment Share on other sites More sharing options...
Richard Harris Posted January 8 Author Share Posted January 8 Excellent job Steve, as always 😎, you will have no problems with seeing that. Good luck with the maiden 😅 Chris, The motor mount is made to the same drawing I sent you and is the final revision....for now 🙄 Quote Link to comment Share on other sites More sharing options...
Steve Jones 2 Posted January 8 Share Posted January 8 Yep Chris . Standard motor mount as rich design . Just watch the diameter for your specific motor and mounting holes . Fine for my 28size motor Quote Link to comment Share on other sites More sharing options...
john stones 1 - Moderator Posted January 8 Share Posted January 8 Lovely job Steve. Quote Link to comment Share on other sites More sharing options...
Steve Jones 2 Posted January 12 Share Posted January 12 (edited) Final finishing for rudder and closed loop system . Guides from safety pins . Tail triangular supports added Edited January 12 by Steve Jones 2 2 Quote Link to comment Share on other sites More sharing options...
Paul De Tourtoulon Posted January 13 Share Posted January 13 A long time ago, I used fishing rod line guides on my closed loop controls. Quote Link to comment Share on other sites More sharing options...
Richard Harris Posted January 13 Author Share Posted January 13 7 hours ago, Paul De Tourtoulon said: A long time ago, I used fishing rod line guides on my closed loop controls. I will be borrowing that idea Paul, thanks for sharing 👍 Quote Link to comment Share on other sites More sharing options...
Richard Harris Posted January 13 Author Share Posted January 13 A few photos I took today of Steve's Gyroo II on its maiden voyage, after a few adjustments it was flying like is was on rails. His model was then set up on a mode 2 transmitter for Rich E to have a go with to which the pair undertook a bit of formation flying with the pair. Video will follow once I have had chance to look through them. Well done Steve, a stirling job 4 Quote Link to comment Share on other sites More sharing options...
Chris Dowell Posted January 14 Share Posted January 14 How good is that.😁 Chris... 1 Quote Link to comment Share on other sites More sharing options...
Richard Harris Posted January 14 Author Share Posted January 14 Here's some snippets of video taken yesterday of both finished Gyroo II's flying. There's also a bit of syncro flying, not an easy thing to do. Hopefully in the next few weeks we will have a few more nearing completion. 5 Quote Link to comment Share on other sites More sharing options...
Outrunner Posted January 14 Share Posted January 14 Great video, nice bit of formation flying! Quote Link to comment Share on other sites More sharing options...
Chris Dowell Posted January 15 Share Posted January 15 Looks like a pretty successful testing session. This is where I'm up to at the moment...Even printed out a set of coordinated bit's. May even get to try some of my printed blades?? Chris... 1 Quote Link to comment Share on other sites More sharing options...
Richard Harris Posted January 15 Author Share Posted January 15 Looking good Chris, On both of the flying models we have added ballast nose weight. Steve's more so than mine which is probably down to his tail plane holder being made from birch ply rather than lite. The plan will be altered to take this into consideration with either a marked area or ballast box to add lead. We have both had to move our motors upwards a tad to which they are pretty much identical, with Steve's he had to get out the scalpel to cut his mast fairing to be able to achieve this. On reflection I would stick with the plan motor mount and mast whilst trimming and setting up, then pretty things up after. Nice 3d printed blades by the way, I would go for the longer 560mm length as the best replicates what we are using up this end of the world. You will find that the extra lift/drag along with the generous tail plane area will dampen out a high motor thrust line, I will take a photo of mine hanging to give you a good idea when I get chance. Both flying models are very predictable, the transition in airspeed as you throttle up takes a little longer with the 8" prop is very smooth which will be perfect for the first time pusheroo. Keep us updated of your progress please? Rich Quote Link to comment Share on other sites More sharing options...
Chris Dowell Posted January 15 Share Posted January 15 Hopefully ,I may not have a balance problem as you will notice that I have modified the top ,front of the fuz just a little trying to get that "Calidus" kind of a profile and I am not in a position to get my hands on light ply. My biggest hold up at the moment is waiting for some props to arrive. Chris... Quote Link to comment Share on other sites More sharing options...
Richard Harris Posted January 16 Author Share Posted January 16 Chris, I did notice the arc was different on the top half of your fuselage, best place to have any extra mass I guess. Regarding the fuselage, I've been half tempted to draw up a full bodied version as I think it would look quite good. It would go against the ethos of the Gyroo so maybe a complete new model would be on the cards for a future project. Rich Quote Link to comment Share on other sites More sharing options...
Steve Jones 2 Posted January 19 Share Posted January 19 Great build as always Chris , always with an Aussi twist !! steve Quote Link to comment Share on other sites More sharing options...
Steve Jones 2 Posted January 20 Share Posted January 20 So for reference , although Rich has suggested the balance via a dimension from the front of the mast, a great idea for plane builders… my model hangs at 10deg without the blades and the battery 🤟 1 Quote Link to comment Share on other sites More sharing options...
Stephen Jones Posted January 21 Share Posted January 21 Here is a Picture of mine so far. Boots, Blades and motor mount to Do. Steve. 1 Quote Link to comment Share on other sites More sharing options...
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