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Type: Posts; User: Joan Walsh

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    Tom, I suspect in your closing remark you have...

    Tom, I suspect in your closing remark you have misunderstood. The speeds in the graph are IAS, not GS



    Two factors to consider there. First, I think the curves would be similar but stretched...
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    Well, my dearly-beloved took the TST up for a...

    Well, my dearly-beloved took the TST up for a jaunt yesterday and came back with three approximate data points for airspeed vs rpm. I would have liked two more, one each above and below this range...
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    Dead right you're missing something Martin......

    Dead right you're missing something Martin... what I think you're missing is that I'm not treating this with academic rigour, I'm experimenting and testing the result against intuition in an attempt...
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    Thanks guys, I agree too that the fuel difference...

    Thanks guys, I agree too that the fuel difference over practical flying speeds isn't worth the fret with a 4-stroke engine. It may well be a different matter with 2-strokes and I'll try it behind the...
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    Martin, Thus Mike's aeroplane flying at 90kt...

    Martin,
    Thus Mike's aeroplane flying at 90kt airspeed into that 30 knot headwind would have a groundspeed of 60kt; and by my gibberish that Tom replied to he would be wanting to fly ever faster and...
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    Tom :D Mike - doing a bit of crude and ugly...

    Tom :D

    Mike - doing a bit of crude and ugly calculating (not fit for publication) using your Rans 912 figures* and translating from mpg to ml/mile, and then putting in a range of headwinds from...
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    Hi Martin, yes, you've identified one of the...

    Hi Martin,
    yes, you've identified one of the unknowns - Rotax don't tell us. I'd have thought for power and fuel consumption calculations, the figures would be most useful in steady state under...
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    Non-dimensional. Use description of line, such as...

    Non-dimensional. Use description of line, such as mililitres per hour, or power in watts - a bit odd I know but its the way the numbers worked out for graphing in the same space :o

    At least it...
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    This could be gibberish and I've got something...

    This could be gibberish and I've got something else to do later so I haven't time to think it through, but thus far...

    I bunged the Rotax 503 data from the manual into a spreadsheet, but the fuel...
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    Ah yes, but... lets take an extreme case, but not...

    Ah yes, but... lets take an extreme case, but not ridiculously so, to illustrate my point. When the headwind is a small proportion of my airspeed (let's not fret about IAS/CAS/TAS convertions and...
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    Optimising miles per litre

    We all know (don't we) that if gliding into wind it's necessary to increase speed beyond min sink speed to get the best range. There are relatively easy techniques to work out this best speed given a...
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    The trouble is that in a real world you can have...

    The trouble is that in a real world you can have 'clear' which is probably incomplete and thus inaccurate, or you can have 'complete and accurate' which is probably legalistic and obtuse (especially...
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    Ignore this button! DO NOT PRESS!...

    Ignore this button!
    DO NOT PRESS!
    http://mein-notruf.de/wp-content/uploads/2010/08/button4.png

    Apologies: feeling mischievous - mods please delete if it gets irritating.
  14. Thread: Pi day

    by Joan Walsh
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    Pi day

    It seems the Americans call today Pi Day from their numbering system which gives March 13th as 3/14 (or 3.1415... 3pm on Pi day?).

    I think in the UK we should 22nd July as our Pi day.

    ;-)
  15. Hope there's more sucess in stopping or limiting...

    Hope there's more sucess in stopping or limiting this than we had with Southend.
  16. That reminds me of the popularity of an...

    That reminds me of the popularity of an environmental test chamber which I had the job of commissioning at work one hot summer back in the last century. One of the technicians would turn up with a...
  17. Indeed, Tom. there's a well established industry...

    Indeed, Tom. there's a well established industry selling nice-to-haves to us "rich" pilots.

    Matt the OP is learning to fly 3-axis microlights, which in today's money means enclosed, heated...
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    TST pod up for grabs

    We have an original style TST pod available free to collect. It was intended for use on a simulator project and has no provenance (ie we don't know which aircraft it came off) so would be of most use...
  19. Hi Try...

    Hi
    Try https://www.bmaa.org/files/til_045_ssdr_handbook.pdf

    I think it answers your questions.

    If not come back on here and we can all have some fun trying.

    Joan

    PS. I found the CAA's...
  20. Try...

    Try http://docs.fasvig.info/ACP/20160513-FASVIG-SouthendPIRresponse.pdf
  21. Very good point Wally; so I just checked. ...

    Very good point Wally; so I just checked.

    Unfortunately they have the same under General Aviation which as far as they're concerned is what we come under. See https://tinyurl.com/ya93hfgy
  22. new CAA guidance about lost, stolen etc log books

    YIKES!

    Just been informed of this policy change by CAA via the BWPA.

    Pilot Logbooks - Loss, Damage, Corruption or Theft

    With immediate effect, the CAA will no longer accept the submission of...
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    And there's the rub, I believe. A culture has...

    And there's the rub, I believe. A culture has grown up that expects the council members to do a lot of work outside their primary role of setting objectives and priorities, and monitoring the...
  24. Ah but Laurie, shareholders' liability is also...

    Ah but Laurie, shareholders' liability is also limited to the value of their shareholding - that's face value, I believe, not any market value (if the company's shared are traded, of course).
    ...
  25. Members are 'members of the company' and we do...

    Members are 'members of the company' and we do control it. We are not shareholders, true, but all that means is we aren't allowed to take dividends.

    Googling found me this beginners' guide here:...
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