Ron Gray Posted August 2, 2023 Share Posted August 2, 2023 I am shortly to embark on an 'assembly' of a Hangar 9 Fokker DVII to be powered by a Laser 200 inline twin (I will probably start a new thread on the conversion/adaptation if there's interest). However I've heard from some guys who have this model saying that the supplied wheels are on the fragile side so I'm thinking ahead to maybe get a better replacement set. The Mick Reeves ones spring to mind but just wondering if there are others I should consider? Quote Link to comment Share on other sites More sharing options...
Paul De Tourtoulon Posted August 2, 2023 Share Posted August 2, 2023 3d printed ?. Quote Link to comment Share on other sites More sharing options...
Ernie Posted August 2, 2023 Share Posted August 2, 2023 Hi Ron, Arizona Models in guess where can supply a kit so that you can make your own scale spoked ones. They are truly wonderful, and truly wonderfully expensive; ernie 1 Quote Link to comment Share on other sites More sharing options...
Ernie Posted August 2, 2023 Share Posted August 2, 2023 Also, why are WW1 spoked wheels dished? ie one side slightly conical, and one side flat ernie Quote Link to comment Share on other sites More sharing options...
Paul De Tourtoulon Posted August 2, 2023 Share Posted August 2, 2023 Any help ?. https://sites.google.com/site/molotclub/trucs-et-astuces/fabrication-d-une-roue-a-rayons http://www.retroplane.net/forum/viewtopic.php?t=2491 1 Quote Link to comment Share on other sites More sharing options...
Ron Gray Posted August 2, 2023 Author Share Posted August 2, 2023 41 minutes ago, Paul De Tourtoulon said: 3d printed ?. I did think of that and have started to design my own but just wondering what is out there. Quote Link to comment Share on other sites More sharing options...
Ron Gray Posted August 2, 2023 Author Share Posted August 2, 2023 13 minutes ago, Paul De Tourtoulon said: Any help ?. https://sites.google.com/site/molotclub/trucs-et-astuces/fabrication-d-une-roue-a-rayons http://www.retroplane.net/forum/viewtopic.php?t=2491 Like the Retroplane ones! Quote Link to comment Share on other sites More sharing options...
Ron Gray Posted August 2, 2023 Author Share Posted August 2, 2023 47 minutes ago, Ernie said: and truly wonderfully expensive Yup, $170 plus shipping etc! Quote Link to comment Share on other sites More sharing options...
Ernie Posted August 2, 2023 Share Posted August 2, 2023 (edited) What about the dishing? Edited August 2, 2023 by Ernie mistake Quote Link to comment Share on other sites More sharing options...
Ernie Posted August 2, 2023 Share Posted August 2, 2023 I remember I needed a 20mm length of 150mm tube for rims for similar wheels. I found an engineer who offered me a 10 meter length of exactly what I needed When I explained what I intended to use the tube for, he called the supplier, told them he had a potential customer who needed samples., and thats how I got a huge supply of big alloy tube ernie 1 Quote Link to comment Share on other sites More sharing options...
Ron Gray Posted August 2, 2023 Author Share Posted August 2, 2023 33 minutes ago, Ernie said: What about the dishing Either 3D printed wheel or laser cut with offset hub. False spokes from outer hub to rim then cover with Solartex. Quote Link to comment Share on other sites More sharing options...
Geoff S Posted August 2, 2023 Share Posted August 2, 2023 I don't see any need for dishing a spoked wheel for aircraft. The shallow side spokes have to have more tension and hence more liable to break. The stresses would be more evenly distributed undished. I've built loads of wheels for bikes/trikes/tandems and they're usually only dished at the back to allow for the space taken by the freewheel block/cassette. You can guess which are the hardest to replace on the road and which most likely to break 🙂 Quote Link to comment Share on other sites More sharing options...
Ron Gray Posted August 2, 2023 Author Share Posted August 2, 2023 So this is my 3D printed initial design, weighs in at 65g but I'll print one off to see! I can use the same basic design to produce them in ply using the laser cutter. 1 Quote Link to comment Share on other sites More sharing options...
Ernie Posted August 3, 2023 Share Posted August 3, 2023 HI Geoff, neither do I, but sometimes they are, hence my question. you'll see from my avatar that I also have an interest in bikes, and fully understand dishing for Julian Alaphillipe etc, but not on a sopwith ernie 1 Quote Link to comment Share on other sites More sharing options...
Nigel Dell Posted August 3, 2023 Share Posted August 3, 2023 Ron I have a set of 1/4 scale MR wheels in kit form for my DB SE5 if you need any details let me know. Quote Link to comment Share on other sites More sharing options...
Ron Gray Posted August 3, 2023 Author Share Posted August 3, 2023 @Nigel DellAre they really 500g for the pair? Quote Link to comment Share on other sites More sharing options...
Don Fry Posted August 3, 2023 Share Posted August 3, 2023 7 hours ago, Ernie said: HI Geoff, neither do I, but sometimes they are, hence my question. you'll see from my avatar that I also have an interest in bikes, and fully understand dishing for Julian Alaphillipe etc, but not on a sopwith ernie I think, it’s to better withstand side loads in landing. Quote Link to comment Share on other sites More sharing options...
Don Fry Posted August 3, 2023 Share Posted August 3, 2023 Ron, re the tyre, what’s your thoughts? I used to have soft round rubber neoprene, with a hole in the middle, to accommodate a plastic short stick, and glue/weld together. Worked well on smaller stuff (1/6 th). Quote Link to comment Share on other sites More sharing options...
Ron Gray Posted August 3, 2023 Author Share Posted August 3, 2023 20mm dia neoprene 'cord' were my thoughts. Quote Link to comment Share on other sites More sharing options...
dave parnham Posted August 3, 2023 Share Posted August 3, 2023 Ron not knowing where or how old your kit is but mine came with a lot of the mods suggested already done, ie the wheels were already bushed with brass tube and they appear to be good quality wheels similar to the usual Williams bros quality. I havent actually flown mine yet still final running in of the DLE 55cc and final placement of batteries etc. CG measurement with no wings is unusual but spot on. Quote Link to comment Share on other sites More sharing options...
Paul De Tourtoulon Posted August 3, 2023 Share Posted August 3, 2023 1 hour ago, Ron Gray said: 20mm dia neoprene 'cord' were my thoughts. Maybe with it's weight hot water hoses for cars, they come in all sizes. Quote Link to comment Share on other sites More sharing options...
Ron Gray Posted August 3, 2023 Author Share Posted August 3, 2023 23 minutes ago, dave parnham said: how old your kit is 2 - 3 years old Dave. Quote Link to comment Share on other sites More sharing options...
Ron Gray Posted August 3, 2023 Author Share Posted August 3, 2023 28 minutes ago, Paul De Tourtoulon said: Maybe with it's weight hot water hoses for cars, they come in all sizes. Yes, water hose would be good and it’s also fabric reinforced. It hasn’t got the same elasticity as neoprene but there is some flex to give it a tight fit on the rim. Quote Link to comment Share on other sites More sharing options...
Don Fry Posted August 3, 2023 Share Posted August 3, 2023 (edited) 3 hours ago, Ron Gray said: 20mm dia neoprene 'cord' were my thoughts. Ok, are you in the market for a couple. Weight is weight, and less is more on airframes. Tyres can be replaced easily. A bit more plastic to allow a brass bush is always good. Edited August 3, 2023 by Don Fry Quote Link to comment Share on other sites More sharing options...
Ron Gray Posted August 4, 2023 Author Share Posted August 4, 2023 I've modified the prototype design to split it into 2 pieces to make it easier to 3D print Quote Link to comment Share on other sites More sharing options...
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