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Tom Mann

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  1. Hi has anyone else come across this remarkable wing section?   http://www.rexresearch.com/klinfogl/klinfogl.htm   As a boy I was given a book by these guys called 'the ultimate paper aeroplane' and made a few from the drawings.  As this article says, it was amazing:   - no stall: just levels off at max height - no tip stall - flies FOR EVER, the glide ratio has to be seen to be believed   The article describes some RC experiments - a tetchy stally model was rendered meek, couldn't induce a spin without serious effort, a prop modified to this section gave more thrust etc etc   So - has anyone had a go, and if not, can someone keen please have a go?  I'm thinking it could be god's gift to beginners in terms of totally forgiving model?  
  2. Thanks all   They were in fact alu pipes - but thanks E.D. for the interesting knowledge - I have brass in another tank!   In the end I bent the long one up as the vent pipe going to silencer.  The shorter ones  simply wouldn't reach high enough in the tank if bent.   The filler pipe is in middle as not bent down - so I'll think to use the feed pipe for draining if necessary (although this makes me think any gunk in the filter will get gobbed bank into the fuel container... mebbe I'll disconnect at the filter to drain.   tom
  3. I have a new bottle tank with thrtee straight tubes, one of which is longer than t'other two.   Is the long one for the "vent" tube, to be bent thru 90 degrees and sit near top of tank?  If so - is this the tube I attach to my exhaust pressure nipple?   If so, the other two'll be feed and fill - but don't need bending - right?   LAstly can I use regular fuel tube for the clunk or do I really need dedicated 'clunk tube'   thanks in advance tom
  4. Paul you beauty!  thanks so much this is clearly the ticket.  tom
  5. I geddit - so I just buy a small capacity battery whose voltage will drop off in the timescale I'm after - or indeed a programmable ESC where I can specify the cutoff voltage if there is such a thing.   good idea boss Still not as user-friendly as a cox with a walnut sized fuel tank though... what with having to recharge or reprogramme ESC for subsequent flights off a single charge. Would have thought there might be a small market for a bespoke 'thing' where you specify the number of seconds of runtime, for free flight toys tom
  6. holy moly that is a beauty Ben - thanks a million for the link, much obliged. Mental note: start playing the lottery!  I must admit though, I agree that the petrols would sound awesome and probably less fussy that glows to match to eachother. Anything in the 60-90" range anyone?
  7. All...and the mighty Tony Nijhuis if he's looking! I'm mad keen to build a nice big P38 lightning (60" or more wingspan) but would want electric to save the faff of tuning two IC's to eachother! Has anyone come across one? Of course if Tony is bored and looking for a new subject...I'm a buyer!! tom
  8. you boys are legends, and a bit mad! Thanks! Rob I hope you're right mate, that does sound SILLY cheap.  OK tonight I'll turn off all the power to the whole house (including her nuclear powered humming sky + box that never bloody turns off, which means she'll miss an episode of hollyenders, HA).  Then I'll charge up the helo pack.  Then I'll boil the kettle to compare.  All this while watching the wheel slowly turn. Boy I know how to have fun.
  9. Hi, I'm lazy.  Has anyone worked out how much hits their electricity bill on a single charge?  My example would be from 3.0 V per cell up to 4.15V per cell on a 4s 3700mah pack.  But any estimates / similar experiments welcome!!  tom 
  10. many thanks y'all for your replies.  I'm going for eagletree it looks pretty slick.  For any UK readers who want to buy: you have to get onto their UK dealer's site https://www.rc-log.co.uk, it worked out at £63 for the logger and whizzy add-on screen to read output.
  11. Aha. This might (pls confirm) explain my bafflement whilst 'improving' on my electric swift chopper.  Whilst footling about spooling up and down alot and trying not to break the ruddy thing I seemed to get reduced flight time out of my lipo.  but yesterday i hovered well non-stop and bejeesis the thing just kepton going.  my concentration went before the pack did. ~What I'm thinking is that all this heat mentioned above is energy after all, and so is 'wasted juice' and that's where my missing flight time went? tom
  12. Hi all I'm looking to build an ultra simple plane with no ESC, just a full power electric run with timed cutoff.  Scouring the web I see lots of nice things that seem to do half of this but then connect to a 'relay' which connects to a leg bone and a hip bone. e.g. http://www.hobbytron.com/CK002.html  Being quite lazy, it'd be nice if someone would sell me a gizmo that I can rig up to my existing circuit of battery+on/off switch+motors (presumably instead of the on off switch) where I could twist a knob to set it to 10 secs or a minute of power depending on size of field...  I don't understand whether it would run off the main power cells or off some aux cell. anyone crossed this bridge already?  tom
  13. On the pusher/puller question, I have a guess.  A pusher setup will drive the prop towards the motor and airframe, so every vibration/pulse will be shoved into the airframe, making it resonate hard. A puller will drive the prop+shaft away from the airframe, with the airframe getting tugged along by its prop shaft. Clearly this is layman's speak and pure fantasy but I think there might be something in it. tom
  14. Jetsome that's a cool idea.  How big was your exit from the fuel proofed wooden box?  Was the power loss related to this obstruction to exhaust? tom
  15. Wattmeters typically go inline between motor and ESC, and display voltage, current draw and power consuption in REAL TIME.  So, for a fixed wing you leave the canopy off and stare at it while you run the motor up. Somehow this loses its appeal when dealing with a 1m diameter main rotor spinning at 2000RPM.  I personally won't be anywhere near the thing to look at it, as I am quite attached to my appendages.  Has anyone seen a product that will store historical data and present a report (average, peak, max/min etc? Come to think of it this would be a touch for fixed wing too because you could get a report based on a real flight (surely more valuable than a ground run).  tom
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