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Mark Kettle 1

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Posts posted by Mark Kettle 1

    Bowman Spatman

    in Building from Traditional Kits and Plans

    Posted

    Hi Piers, I have some experiences with EPP, hotwire and cutting, I'm willing to share my findings, ask via the 'Personal Message' system, so we don't distract on this Spatman thread.

    Different foams or materials for model aeroplane building maybe the way for little while, whilst we wait for new balsa to come.

    20140126_172901.jpg

    Above picture - Epp square edge cutting guide.

    20140126_180226.jpg

    Above, used on a sheet of waste foam packaging, maximising the foam usage yes, because it's expensive now days.

    20140715_182226.jpg

    20140307_144857.jpg

    Slicing rig, thinning down sheets of EPP foam.

    Cardboard construction for planes

    in All Things Model Flying

    Posted

    KC, you asked if it's practical? It's cheaper and it can be done, however watch out for water or should I say rain. When I was flying something else I left Hill Billy out beside the car when I got back it was a bit soggy. Mined you, after it had dried out, I checked it over for any 'warps' etc and it was OK and flew again no problem.

    Below, Hill Billy over the sea.

    Hill Billy over the sea

    new to wash out

    in Scale and Semi-Scale kits

    Posted

     

    Andrew C, - Brokenenglish - is correct in my book. I control the washout in my designs the way he describes.

    To help with this let my show a rib set. A 'rib set' for a Avro Vulcan, the longer rib is at the root - the middle of the wing, the smaller rib is the tip.

    Notice the bottom line of the rib's to the trailing edge are flat, this helps building of the wing and following on with the trim of the model in the sky over a wide range of flying speeds. The washout effect comes from the main bulk of the wing in the middle flying down it's chord line and this makes the tips show washout, the incidence of the tip chord being different to the middle root chord/s. Controlled via my curves, measurements and built flat on the board.

    9 wing ribs - 10 rib shapes seen

    Below:-

    The Root and Tip ribs shown with each other. The main incidence setting coming from the larger rib having the curve come up from the bottom line at the front to the leading edge, and all ribs / wing built from a flat building board.

    Rib fronts showing different incidents

    This method I believe makes the model have great stability and control, even left to fly 'hands free' sometimes. See the foam wing in action, using the same wing sections shown above. A nice stable wing, with the model pilot able to place the model where he wants.

     
    Filmed March 2015, North Wales UK.
     
     

     

    Edited By Mark Kettle 1 on 26/06/2020 23:53:26

    In 1961 The New German Federal Luftwaffe

    in PSSA Mass Build 2020 - North American F-86 Sabre

    Posted

    Wood nose intake

    In lock-down and on 80% furlough I've been categorise by ('hwmbo' ....is that how it's spelt? ....as a DIY Lifer.

    After numerous jobs and various total room make-overs around the house, I've asked for day-release x 10, the reason for the request is to get my Sabre Jet finished.

    Judgement has been made in my favour, so Thursday, tomorrow is the day I get back to the modelling table/ bench.

    Hallelujah.

    Covid 19 has a lot to answer for.

    20200322_135441.jpg

     

    I shouldn't compliant, over the period I've have had the odd bike ride out, sometimes accompanied with - hwmbo - .

    I've even wander ( on our bikes ) by the Buckminster site, however no flying. Has anybody any idea when it will be open?

    20200516_122114 (1).jpg

     

    20200516_122136 (1).jpg

    Roll on tomorrow yes.

    Edited By Mark Kettle 1 on 24/06/2020 22:57:14

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