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Scruffmeister

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Posts posted by Scruffmeister

    What's Your Experience Using Super 'Phatic Glue for "CA" Hinges?

    in Hints and Tips

    Posted

    I am trying to build up the courage to use Super 'Phatic glue to secure the "CA" hinges in my current build (a 60" electric 3D/aerobat). The testing I have done with scrap wood and hinges has been successful and the joint seems very strong. The wicking properties are evident and can be seen in the top half of the hinge in the attached photo.

     

    However, I am unsure of the long term properties of the joint when subjected to constant flexing in this environment. If you have been using Super 'Phatic (or indeed any aliphatic) glue for "CA" hinges, please could you let me know your experiences, failures and longevity?

     

    Thank you!

    Screenshot 2024-02-27 110028.png

    Sealing Acrylic Paint on Foam

    in Foam models

    Posted

    Thanks both, the paint appears to have taken nicely and isn't flaking. Indeed it seems fairly tough as much as I dared scratch it with a fingernail. I cleaned the surfaces with methylated-spirits before painting. Just want to give it the best chance of a long life with some kind of water-based finish/varnish.

    Edited By Scruffmeister on 11/04/2020 20:44:29

    Sealing Acrylic Paint on Foam

    in Foam models

    Posted

    Hi All,

    I've just painted a Dreamflight Weasel slope-soarer using Liquitex acrylic spray paint. I'm pleased with the result but think it is going to need sealing to try to stop the paint flaking and some water-resistance for when it lands in wet grass.

    Can anyone recommend something that can be applied from a spray can please? Extra points for a link to an online shop as I will need to mail order due to isolation!

    Thanks

    img_20200410_132818.jpg

    Seagull Challenger ARTF Fault

    in Sport, Aerobatic and 3D kits

    Posted

    Hi All,

    I recently obtained a Seagull Challenger ARTF. Having just got it out the box it appears to have a very odd characteristic that suggests it has been incorrectly built...

    The port side of the model seems to have been built from 3.5mm balsa, whereas the starboard side is 5mm. I've attached some photos to show what I mean.

    Can anyone confirm if their Seagull Challenger ARTF exhibits this same characteristic please?

    Attached some photos.

    Many thanks!

    img_20200111_130802.jpgimg_20200111_130826.jpgimg_20200111_130844.jpg

    Measuring Dihedral

    in Building from Traditional Kits and Plans

    Posted

    Just want to check this one, where a plan specifies dihedral, you would presumably measure this from the chord line if not specified?

    Below is the Chilli Wind plan I am working from, it does say "under" each wingtip so perhaps the intention is to put a 1" block under each tip when joining at the point shown on plan? I need to commit to an approach before I cut foam cores!

     

    capture.jpg

    Edited By Scruffmeister on 17/11/2019 21:16:04

    Irvine .53 / Ugly Stik

    in IC Engines

    Posted

    The Rival, and its big brother Big Easy both look great - many thanks for pointing me toward those.

    The Rival is 55" designed for 0.46

    The Big Easy is essentially a scale-up, 66" and designed for 0.60-0.90

    So, with that in mind maybe 58" is the correct scaling for a .53 !?

    In a more general sense, is there a rule of thumb for IC of HP to wingspan for various styles of flying - e.g. the equivalent of the Watt/Kg rule used in electric flying?

    Irvine .53 / Ugly Stik

    in IC Engines

    Posted

    I only have an Irvine .53 engine available for this so changing engine not an option. I like the description that you would "need to throttle back for a stall-turn", but that the model would not have unlimited vertical.

    Ultimately this model is intended to allow me to hone my drafting/(limited) building skills and provide my kids with a hack they can use as they move beyond their BMFA A-test to hone their skills. It needs enough power to get out of trouble if I'm on the buddy box with them though!

    Perhaps 60" is about right? I've used this Irvine .53 on a Wot4 (ARTF, 53" and it goes like a rocket - quite a bit more powerful than I envisage for this model. I know the original Kraft design was 60" on a 60-size engine but I imagine the Irvine .53 is fairly powerful compared to a .60 of the time the plan was drawn.

    Irvine .53 / Ugly Stik

    in IC Engines

    Posted

    Hi All,

    I'd be interested to get some thoughts on this please. I'm planning on taking the classic Ugly Stik design and adapting it to suit an Irvine .53 engine. By adapting I really mean scaling although I will probably redraw the plans to hone my CAD skills.

    I'd like the model to be fully aerobatic to a minimum of the BMFA 'B' (Loops, Rolls, Spins, Stall-Turn) but not overpowered.

    My initial thoughts are to aim for around 55" wingspan, maybe 12x5" prop.

    What would be your ideal wingspan / prop combo for for Irvine 53 on this model?

    Cheers!

    Electric Motor for 0.49cu in Conversion

    in Power System Selection

    Posted

    Hi all,

    I'm building a free-flight model for the Nats, a Mecury Wizard. The plan calls for a .049cu in engine, but I'd like to go electric.

    Clearly doesn't need to be overpowered, just a decent climb-cut-glide.

    Can anyone point me in the right direction of a motor/esc/battery combo? I'll need to figure out how to do a timed run of the motor but sure that has been solved somewhere on Internet!

    Thanks

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