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Alan Davidson 1

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Posts posted by Alan Davidson 1

  1. The Spearfish looks interesting if not a little expensive. The Sperber was a T tail at 74” span. The wing tapered by 1” to the tip with a 1” forward sweep. I have a kit plan but not details of wing ribs, formers or fuselage width and when I built the original kit I was too green to make templates for further use.

    Thank you for your response

    Alan

  2. When I try and view archive rcm&e mags I get

    An Error Has Occurred

    I'm sorry but we can't process your request at this time (bad referrer)

    Is anyone else suffering from this?

    It has been like this for some weeks. I have contacted the mag but not yet received a satisfactory outcome.

    AD

  3. Thanks guys

    will try the smaller prop range for experiment and gently see what results, and then the 2s with the 10x6 prop with a view to using this configuration

    Many, many thanks for all the wonderful assistance. I will post again if it all goes well. I will also post pictures of the smoking wreck if it doesn’t.

    Thanks again

    Al

  4. Thanks for all the help folks.

    The details are

    flying weight 1.4kg

    46” span, 8.5” cord

    the motor is a graupner compact 345z #7738

    1500Kv, 7.2 - 11.1 v, 20 - 35A, spinning an 11x6 on 2s and 10x6 on 3s

    for the 10x6 the blurb quotes 27A and 11x6 - 32 A. and states the motor is compatible with a model between.75 and 1.5 Kg auw

    As I said in my original post, even using the higher volts available from the 3s lipo, the current draw is well outside these guidelines. Hence my uneducated confusion.

    The replies trend toward trying a lot smaller prop and try and ascertain if the power train is a: incompatible or as I think b: the power train is incompatible given the prop size / efficiency..

    Where did I put my glow fuel....🤔🤪

  5. I have converted my Derek Woodward Amelia to electric and chose a motor esc combination based on model size and a prop 10x4 9x6 basis it flew ell on with an ST G20-23 glow (did I say I was old). When I ran the combo (Graupner 7738 30A motor with 40A Overlander esc the max throttle reading climbed through 70A. Didn’t realise how fast I could cut the throttle!

    The 9x6 prop still exceeded 55A on full power. As a total newby to electric can anyone help please or should I wait for November when none of us maybe flying

    Al

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