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Thread: Tadpoles


  1. #26
    toolmaker7341's Avatar
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    RE: Tadpoles

    What is that great looking aircraft? Is it a kit,plans or arf
    Mike Burg

  2. #27

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    RE: Tadpoles

    A lowly VMAR "Arrow Tiger" ARF pattern trainer.

    55" span. Symmetrical airfoil.

    Shape reminds me of 'half-half' P-51D Mustang and Bf 109-G Messerschmitt.

    Still available.

    http://www.levelflight.com.au

    This business also sells ENYA 2 and 4 stroke diesels. A big plus from me for that.

    I have just bought a VMAR Scottish Aviation "Bulldog" for an Easter 2013 Build, to be powered by a diesel 10 cc. Build and wood quality is much improved.

    It's no 'World Models' ARF, but excellent value for the price.

    Apologies ... I am a long way off Micro-diesels.

  3. #28

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    RE: Tadpoles

    Fiery have several VMARs the Apache ll and lll among them the apache ll has been around a long time sturdy build had an Irvine 40 diesel then a upgrade to Irvine 53 Davis head
    on the 53 it will knife edge also the hot rod high wing the apache lll has a side mounted 52 4strk ASP and cowled in to get a way from the trainer look also a low wing arrow 40 size
    think it is a VMAR and an other high wing Hot Rod I have no beefs with VMAR qualitythey had some issues years ago but no more, at least in the last 10 years martin


    Post Note I do have an ASP/MAG 4 strk converted to Diesel by Greg Glamryz that I can swap in
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  4. #29

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    RE: Tadpoles

    But I'm OT!..............10,050rpm on a Cox 5x3 yellow this morning-unfortunately the camera batteries went flat when I tried to get the tacho shot........more to come. The Cox 5x3 still represents a significant load compared to other 5" props such as the Topflite or DC 5-1/4x3-1/2, so the performance continues to impress. Engine sounded very happy running this prop-but definitely harder to start.

    ChrisM
    'ffkiwi'

  5. #30

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    RE: Tadpoles

    Over 10,000 RPM on a Cox 5 x 3?

    Now I really want one! I have a box of those Topflite 5 1/4 x 3 wood props too ...

    As you said Chris, lesson learned.

  6. #31

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    RE: Tadpoles

    It took a bit of tweaking to get it there, but we made it in the end. Camera batteries currently on charge, so I'll try and get a repeat run later-but its getting warm here today and it may not be so happy-we'll see.
    Eventually I will run it on the raft of small props I've carefully balanced and we'll have some reasonable figures for reference. I won't do the APC ones though-as they'll need a bushing machined up, and I'm too busy with my Nats preparations. Perhaps early in the New Year, after I've returned from down south.

    ChrisM
    'ffkiwi'

  7. #32

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    RE: Tadpoles

    sounds like the tadpole turned into a bulldog martin

  8. #33

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    RE: Tadpoles

    Well how much you'll eventually see once I run a series of comparative tests of the same props on the mini ED Baby of the same size..........but I need to make a compression screw lock for that one

    CJM

  9. #34

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    RE: Tadpoles

    'ere we are then-10080rpm, proof positive............

    CJM

    .....a quick check on the calculator suggests that this equates to ~0.013 BHP.......there may be a bit more to be got from the engine yet
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  10. #35

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    RE: Tadpoles

    Chris

    Is it able to drain it's tank yet on a given needle setting? Or leaning out and quitting?

    Now the Schlosser .25 cc's are also historical artifacts. it looks like I will have to keep my eyes open to see if one comes up on *bay.

  11. #36

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    RE: Tadpoles

    It still gets hot and labours to a stop unless you back off comp and richen the needle after about 1-1/2 minutes running-I've probably managed to run the tank dry twice in about a dozen separate runs. The shaft is a beautifully free fit in the main bearing so I'm assuming its cylinder friction is the issue here. I also noted today that the contra seems to freeze after more than a couple of minutes running [for the run where I took the photo, I topped the tank back up from nearly empty whilst it was still running-so that was a longer run than usual-and found that I couldn't back off the comp once the engine started to labour.
    One thing I'll say for the wee beastie-you can tell whens it's happy.........and you can definitely clearly hear when it's unhappy........

    ChrisM
    'ffkiwi'

  12. #37

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    RE: Tadpoles


    It has a nice tight P/L fit - check.

    It has a contra that 'locks up" when really hot - check.

    These are plus points. I dislike engines that are a "loose" piston fit out of the box, and diesels with leaky contras are annoying.

    The issues will only improve with running time, which is a bonus with a diesel this small.


  13. #38

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    Finally landed one of these ...

    https://www.youtube.com/watch?v=qYw3...ature=youtu.be
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  14. #39

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    G'day Derek, Seeing that run today was sensational, well done

    Nice nail polish BTW (VVTIC)

    Cheers Mate


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