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Type: Posts; User: Mr Cox

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  1. Replies
    4
    Views
    77

    It is a lot easier to analyze these things on a...

    It is a lot easier to analyze these things on a test stand.

    If it runs too lean, no matter how much you screw out the main needle there are a few things to check. Appart from possible tank issues...
  2. Thread: Club PAW

    by Mr Cox
    Replies
    110
    Views
    4,877

    You could try with an Enya 09 carb instead, they...

    You could try with an Enya 09 carb instead, they are a direct drop in and helped me when I was having a throttling issue.

    The original PAW carb was also repaired by making a new throttle barrel...
  3. Well, I have gone through my share of different...

    Well, I have gone through my share of different props on the Cox 05RC already. The solution was very simple in the end, all it took was to replace the engine with a Norvel. Here are some numbers as a...
  4. Thread: Club PAW

    by Mr Cox
    Replies
    110
    Views
    4,877

    The .09 MkI and MkII should both throttle really...

    The .09 MkI and MkII should both throttle really well, don't know why yours don't.

    From memory I have always had mine such that the two holes do not show from the top at full throttle.

    One...
  5. Looks like a nice flight. :) Now time for...

    Looks like a nice flight. :)

    Now time for removing the landing gear and fitting a Norvel .061 for something a little more serious?
  6. The groove for the shim doesn't really serve any...

    The groove for the shim doesn't really serve any purpose I think, and it can simply be removed.
    It only reduces the visible gap between the cylinder and head a little...
  7. I prefer to remove some material from the head...

    I prefer to remove some material from the head instead, that works on the OS engines too. One just has to be careful with the inner corner, there cannot be too much of a radius there or it will...
  8. Sounds like you have some bench running fun to...

    Sounds like you have some bench running fun to do. :)
  9. Yes, but I think CP also used a larger CL...

    Yes, but I think CP also used a larger CL venturi, no muffler, a shimmed liner etc. for that one? Plus the down-cut prop...

    You can also look at it in terms of power:
    5.75x4 @ 22500rpm : 190W...
  10. I think you're overestimating these engines a...

    I think you're overestimating these engines a little...
    The rated rpm values doesn't really mean much, over than possibly giving you an over-revving safety limit. It certainly doesn't mean that it...
  11. Around 19000rpm sounds about right, nothing to...

    Around 19000rpm sounds about right, nothing to worry about, just keep treating it nicely... :)
    They do like a little lighter load though, they are most happy above 20krpm.

    Here are some numbers...
  12. Thread: Enya SS15

    by Mr Cox
    Replies
    2
    Views
    206

    Priming might be the problem, it is not always...

    Priming might be the problem, it is not always easy to prime through the intake. Have you tried using the primer tube in the muffler?

    With a new engine it can also be easier to do the first runs...
  13. Replies
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    237

    What was wrong with the stock crank? A little...

    What was wrong with the stock crank?
    A little rust on the surface doesn't really do any harm, and it is easy to remove anyway. Just change the ballbearings as they might have rust too.
  14. Replies
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    549

    That has all changed now when there are Turbo...

    That has all changed now when there are Turbo plugs available with different heat ranges. With something like the OS P4 or P3 plug you can have both good high end power and good throttling.
  15. That's an odd behaviour at full throttle, did you...

    That's an odd behaviour at full throttle, did you make a funnel on the tank went? I don't think thats needed, on the cox 05RC I only used a cut-of tube in the firewall.

    You might want to check the...
  16. We only have a really tiny river next to the...

    We only have a really tiny river next to the field, so I could get it out while only getting my feet wet. Fluke thing really, I don't even think I could hit that water on purpose if I tried to......
  17. Oh, and congratulations to both a great build and...

    Oh, and congratulations to both a great build and a successful maiden! :)

    The battery drain sounds a little odd to me...
    A 298mAh drawn during 14minutes of flight would equal more than one 1A...
  18. What rpm's do you get with the 5.75x3 prop? On...

    What rpm's do you get with the 5.75x3 prop?

    On the TD 05RC I got somewhere around 17200rpm (on 10% nitro and the APC 5.7x3) and it didn't need any muffler pressure with the stock carb. I could...
  19. For the pleasure of it, the OS .20 and .25 are...

    For the pleasure of it, the OS .20 and .25 are also sought after, they run smoother than the .30 one.
  20. Replies
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    291

    The Brodak .049 ones are a bit feeble in terms of...

    The Brodak .049 ones are a bit feeble in terms of power, part of that comes from using a regular glow plug I guess.
    I was planning on making a head for it that would take a Turbo plug, but I'm not...
  21. The Utckam pipe doesn't do anything below...

    The Utckam pipe doesn't do anything below 20000rpm, in my experience. You could try a smaller prop, like the APC 6.5x5 instead, that worked on my MVVS .15.

    But I guess the exhaust timing is...
  22. Replies
    11
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    291

    The smallest that is still being made would be...

    The smallest that is still being made would be the Norvel .049 engine, now marketed under the NV label. They also have a throttled .061 engine but both of these mainly like small props and revs at...
  23. Replies
    174
    Views
    3,069

    Yes, the dreaded covering is a pain, it rarely...

    Yes, the dreaded covering is a pain, it rarely comes out as well as one had wanted...

    The build looks good so far, and with a blistering build speed as usual :)
  24. Replies
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    1,017

    I have noticed the site being down too, just...

    I have noticed the site being down too, just thought it was sad to see another great engine go away...

    I have only seen a proper IOM close up once, the design seems every bit as complicated as the...
  25. Replies
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    192

    Sounds like something is a little off, with that...

    Sounds like something is a little off, with that engine. I think Pee Reivers once said that they were a bit sensitive on the timing, and not all would run to their full potential straight from the...
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