Stephen Jones Posted December 31, 2021 Share Posted December 31, 2021 Hi, I am in the process of making my own Mini Indoor Autogyro but 1st I need to experiment making a head. This one is using a silicon tube to allow movement of the head Up-Down Left-Right the bearings in the tiny bell motor work really well. Of coarse weight has to be kept down to a minimum. I may go with this one . Steve. 4 Quote Link to comment Share on other sites More sharing options...
Stephen Jones Posted January 1, 2022 Author Share Posted January 1, 2022 Ok so a update on the Blades / Head. They seem to work ok. So now I will start on the build of the scale Autogyro model. Steve. 2 Quote Link to comment Share on other sites More sharing options...
GrumpyGnome Posted January 1, 2022 Share Posted January 1, 2022 Indoors and scale ? Wow..... Quote Link to comment Share on other sites More sharing options...
Stephen Jones Posted January 1, 2022 Author Share Posted January 1, 2022 2 hours ago, GrumpyGnome said: Indoors and scale ? Wow..... I know nothing like setting yourself up for a challenge. Steve.? Quote Link to comment Share on other sites More sharing options...
Martin McIntosh Posted January 1, 2022 Share Posted January 1, 2022 What will the rotor diameter be? I made an o/d one which is a scaled down Atom and I called it a Muon but I only tried it once and the 2mm head bolt was not up to the job. It will be somewhere on the Atom thread, now unfortunately chucked in the garden shed. Best of luck getting the rotor to spin with no wind. Quote Link to comment Share on other sites More sharing options...
Richard Harris Posted January 2, 2022 Share Posted January 2, 2022 Happy New year Steve and good work. Somewhere there is a thread on one of several small models I built a few years back, I did exactly the same thing in using silicon tubing for the pivot. I also found that using heat shrink tubing for the control 'links' worked well, I added drops of CA to the ends of the carbon rod before shrinking. I did several experiments with blades types and ended up with a balsa LE and depron TE profiled with my sharp lower LE edge type aerofoil. The best material used for the flapping 3 bladed head was PPP cut out of a Jacobs Cream cracker lid, 2 blades I used 0.4mm FG sheet. Even with a modest size autogyro you should easily keep it within the walls of an indoor Gym, my reduced size Fire Fly goes well indoors. I had no luck with the mini Nellie, it was a little too fast for indoors, either that or the walls moved! If you need any more info regarding my small stuff just ask, though if you are like me the enjoyment comes from going it alone. 1 Quote Link to comment Share on other sites More sharing options...
EarlyBird Posted January 2, 2022 Share Posted January 2, 2022 This does look interesting. Quote Link to comment Share on other sites More sharing options...
Stephen Jones Posted January 2, 2022 Author Share Posted January 2, 2022 Wow, Richard where has the time gone 2013 I had completely forgotten the mini Firefly. Thanks for the info mine maybe more of a challenge as yous looks huge in comparison to mine. Mine has a rotor diameter of 460mm for a twin blade head compared to yours which I think is 600mm 3 blade head. And mine will operate on a 1 cell Lipo. So a really big challenge but if it works being smaller and lighter should work well indoors. I am setting my goal Auw to just over 50g at the moment I am up to 68g so I may have to re-build several times changing head design and construction to get my weight down. Fingers crossed Steve. Quote Link to comment Share on other sites More sharing options...
Stephen Jones Posted January 2, 2022 Author Share Posted January 2, 2022 Oh and my blades are 5mm depron with 1/16th balsa leading edge. Steve. Quote Link to comment Share on other sites More sharing options...
ken anderson. Posted January 2, 2022 Share Posted January 2, 2022 following this thread of yours again Stephen,you do some clever stuff. ken anderson...ne..1.... SJ Fan club dept. 1 Quote Link to comment Share on other sites More sharing options...
Stephen Jones Posted January 2, 2022 Author Share Posted January 2, 2022 (edited) My blades weigh 15g I feel these are a wee bit heavy so this could be due to the brass tube, brass collet, plastic flexi plate. So will have a re think on that. In the mean time this is the Mast. The motor mounted and wheels. And a new head which is lighter may have to lose that brass collet though. Steve. Edited January 2, 2022 by Stephen Jones Quote Link to comment Share on other sites More sharing options...
Stephen Jones Posted January 6, 2022 Author Share Posted January 6, 2022 (edited) Hi, It is a bit too cold to work in the loft so I thought I would work on my drawing. I have done some more testing on the rotor head and decided to scrap this one as just too heavy. I have come up with a better solution which is lighter and will allow me to better balance the blades and alter the pitch. After testing this unit with my blades I am happy it is lighter and better for me. Also I think I can make lighter blades so more testing in that area too. Steve Edited January 6, 2022 by Stephen Jones typo Quote Link to comment Share on other sites More sharing options...
Stephen Jones Posted January 8, 2022 Author Share Posted January 8, 2022 Hi, Finished work on the body and printed it out and I am happy to make a start building it now. If all goes well I may make a larger version for flying outdoors. Steve. ? 1 Quote Link to comment Share on other sites More sharing options...
Stephen Jones Posted January 9, 2022 Author Share Posted January 9, 2022 Hello again, Some of you may have already guest that I am building a peanut scale YT-9 Autogyro. As this will need to be very light I will need to do so experimenting along the way, so I will be building two versions one from foam sheet and the other will be stick and tissue. Steve. Quote Link to comment Share on other sites More sharing options...
Stephen Jones Posted January 9, 2022 Author Share Posted January 9, 2022 Start of the foam version. So here I have printed out my plan and cut around the body and made some holes through it so I can stick it to the Foam. After sticking the template to the 5mm Depron foam with tape I carefully cut out. I then cut out two 3mm doublers. Steve Quote Link to comment Share on other sites More sharing options...
Stephen Jones Posted January 9, 2022 Author Share Posted January 9, 2022 Now it time to make a hole through the body for the mast. I made a guide from scrap balsa. This was lined up with the position on my plan. This allows me to use a brass tube which will now be guided through the foam. As you can see by the picture above. Now the mast will fit into the body. Steve, 2 Quote Link to comment Share on other sites More sharing options...
Stephen Jones Posted January 9, 2022 Author Share Posted January 9, 2022 Hello again, Some more work done on this one. So I have cut out some 3mm depron sides. Cut a slot out for the tail plane then glue the sides onto the body. Bound and glue a hinge onto the mast. The mast is now glued into the body. Steve. Quote Link to comment Share on other sites More sharing options...
Stephen Jones Posted January 15, 2022 Author Share Posted January 15, 2022 Hello again some more work done on this one today. Here you can see the tail plane has been added along with the control linkage. Tested and working. The model is now fully constructed. I now need to permanently fix the servos in place, now I know where they need to be. Next I need to set-up the angle of the head and blade pitch That should be fun. Steve. 3 Quote Link to comment Share on other sites More sharing options...
Richard Harris Posted January 15, 2022 Share Posted January 15, 2022 Great work Steve, looking forward to some flight footage. Rich 1 Quote Link to comment Share on other sites More sharing options...
Stephen Jones Posted January 16, 2022 Author Share Posted January 16, 2022 2 hours ago, Richard Harris said: Great work Steve, looking forward to some flight footage. Rich Thanks Rich, ?? Forgot to mention the weight is 56g ? Servos fitted and tested. Just a preview of the controls need to set-up the correct angles. Happy with the weight and power so far. Servos do not seem to have a lot of movement though. Steve 1 Quote Link to comment Share on other sites More sharing options...
ken anderson. Posted January 16, 2022 Share Posted January 16, 2022 excellent Stephen56g,i wouldn't have thought it would need a lot of movement for the size/weight.. ken anderson...ne..1..SJ fan club. 1 Quote Link to comment Share on other sites More sharing options...
Stephen Jones Posted January 16, 2022 Author Share Posted January 16, 2022 34 minutes ago, ken anderson. said: excellent Stephen56g,i wouldn't have thought it would need a lot of movement for the size/weight.. ken anderson...ne..1..SJ fan club. Thanks, Testing day today. ?? Steve. 1 Quote Link to comment Share on other sites More sharing options...
Richard Harris Posted January 16, 2022 Share Posted January 16, 2022 Steve, You only need half the amount of throw using 2 blades compared to 3 and and a few degrees more rearward tilt. Rich Quote Link to comment Share on other sites More sharing options...
Stephen Jones Posted January 16, 2022 Author Share Posted January 16, 2022 11 hours ago, Richard Harris said: Steve, You only need half the amount of throw using 2 blades compared to 3 and and a few degrees more rearward tilt. Rich Thanks Richard. Un fortunately I could not get the model to track straight on the gym floor the blades did seem to get up to speed at a walking pace but until I can try a few test hops no point in chucking it to hit a hard floor. So I now need to fit new wire for the landing gear and find some small foam / rubber wheels to grip to the shinny gym floor. Steve. 1 Quote Link to comment Share on other sites More sharing options...
Stephen Jones Posted February 20, 2022 Author Share Posted February 20, 2022 Steve 1 Quote Link to comment Share on other sites More sharing options...
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