David Oatham
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Thanks Richard, that's all very helpful. I'm glad you mentioned the vertical CG as that was my initial query. How can you locate / estimate the vertical CG on a tractor model?
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Thanks for your reply Big T. Yes I am aware of the hang angle as I have built an Atom in the past. The other factor that I'm unsure of is how much motor downthrust is required? I assume the right motor thrust is looking from behind, and as a 'dyed in the wool' fixed wing guy this always seems odd as fixed wing motors tend to have a few degrees of left thrust. Is the whippet plan available anywhere do you know? Dave
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I have recently completed my 'Revolver' autogyro, and the instructions were quite clear on how to locate the CofG. This seemed reasonably straight forward by hanging the model from the rotor spindle and then by the noseleg. I understand that the motor thrustline must not be below the position of this, and in fact all seems OK. My question is regarding how to find the CogG position on a tractor type autogyro rather than a pusher type. I am in the process designing something along the lines of the 'Atom' but slightly larger. Also is there a rule regarding the height of the mast in relation to the fuselage / stabiliser? Any advice would be greatly appreciated. All the best, Dave
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Hi Rich, I've just got my shiny new 3D printer (Artillery X1) and fancy having a go at printing some blades for my Atom and Panther models. Where can I locate the STL files suitable for these models? I've looked at the 'Files' section for the group but don't see them there. The ones that you say interlock sound interesting. Any advice on the printing side would be appreciated, for example which type of material etc. Many thanks Dave
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David Oatham joined the community
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Advent Prize Draw - 21st Dec
David Oatham replied to David Ashby - Moderator's topic in All Things Model Flying
Please include me in the draw too .... Happy Christmas everyone -
Hi Andy, the only place I found for the dual u/c when I got to your stage of the Panther build was DB SPORT AND SCALE. They were very helpful. Best of luck with your Panther, one day I'll get around to flying mine, but it always seems too windy lol. Dave
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Thanks Phil, I was thinking of leaving the windings in place, I guess the weight saving would not be too significant.
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Hi all, has anyone built the 'Roto- Duo' autogyro that was a free plan in RCME June 2019 edition? If so it would be interesting to know how well it performed. As there was nothing currently on the building board, I thought I'd bash some balsa . It's got 2 rotors that spin in opposite directions, but the only steering control is provided by the rudder, which to be honest looks rather small !! One more thing, does anyone know how I can remove the windings of a couple of old brushless motors. These will be the bearings of the two rotors. I have successfully removed all of the magnets using a hot air gun but i'm struggling with the windings. Cheers for now, Dave
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Hi Stephen, I like your idea. How have you used a drawer runner in your shaper, and how do you ensure that the prepared blank blade remains in the correct position during the sanding process? Cheers, Dave
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This is my contribution to the 'completed' selection of Panthers It was successfully 'maidened' on 16/08/2020 by my friend Kevin, but I feel I need to gain more experience with my Atom and G2 before taking to the sticks myself
