Adam

[Bobbyr]

Hows that Speedo Going matey ?                                  Bob

[isoaritfirst]

well he has built it a box for safe keeping 

[Woodstock]

Lets start a raffle: How Many Speedos can you Pack into Adam's New Box?  Me first - I guess 29 !

[isoaritfirst]

depends if you allow slamming the lid or not 

[Bobbyr]

I could get 29 in my old school leather satchel                               Old style brown with a buckle and a slot for yer name                              Bob

[Woodstock]

isoaritfirst said:

depends if you allow slamming the lid or not 

... and compressing the contents by jumping up and down on them...

[simon_t]

Some Photos of Adam's speedo on early on the Sunday before the Nats at the Bwlch. Simon    

[Adam Richardson]

Bobbyr said:

Hows that Speedo Going matey ?                                  Bob

Sorry Bob only just seen this section of the forum   Thanks for posting the pics Simon,  The speedo was to replace my alula as a model to fly at the comps where we stand around waiting for the wind, and to be honest its much nicer to fly on a slope than my alula was. so quite happy with it  Does go up quite well in thermals too, (testing the £6 spektrum copy Rx out) Cant see it lasting long tho as i keep doing silly things with it

[Gromit]

I was hoping that you'd  be using it in the Lundy F3f    Stuart.

[simon_t]

Adam's Speedo looked very good for that type of model at any price.  At the cost they are it is an absolute bargain! Simon

[Gonesoaring2003]

Maidened my Speedo today (same colour scheme as Adams) at Watership Down, like has been said, what value these little rocketships are. 2 things I learnt are that it doesn't like flap or snapflap, both seem to make it drop out the sky. Also maidened my Pilatus today – thats 3 models maidened in a week (Vector 3 at Whitesheet Friday) and they're all still in one piece ready to fly again, I think after a few years of this hobby I'm finally getting somewhere!!   Only issue was the pop up airbrakes don't seem to slow the Pilatus down, might have to try adding some spoiler as well. 

[simon_t]

Only issue was the pop up airbrakes don't seem to slow the Pilatus down, might have to try adding some spoiler as well. 

 With the spoilers out did you keep the model slow by holding the nose up, or force the nose down and fly faster?  Brakes work better when you steepen the approach - and the speed shouldn't build up too much.  They are not very effective if you fly the model slowly. Simon

[Gonesoaring2003]

Thanks SimonI tried various approaches but the pop up airbrakes seemed to make very little difference – if I put the nose down she speeded up, this is my first experience of the pop up style, so had not mixed in any ele comp which allowed me to try various things when they were out – tried at height first!Watership Down can be a bit tight for landing! And then theres all those rabbits to look out for!

[simon_t]

OK, that's not so good.  Are they popping up to 'vertical'?  If they are only getting to 60 degrees , they will not be nearly as effective as fully vertical.  Have you tried 'sideslipping the model (try at altitude first, and plenty of down at the same time as crossed aileron and rudder, to avoid dropping a wing).  My Flair K-8 comes down very well with brakes out, but if sideslipped as well it will come down twice as fast without gaining forward speed.

[Gonesoaring2003]

These are the airbrakes that extend vertically out of the wing - I think they might ne known as Blades? (not front hinged) made by multiplex and they are extending fully.No didn't try sideslipping - perhaps that my next thing to try, although i might try raising the ailerons as spoilers as well.CheersAlex 

[simon_t]

OK, I understand - same as I have on a few models, and normally pretty effective - are they raising right up?  They normally have a couple of sections, which should provide plenty of drag if raised fully - what size (span) is the model, and what size are the spoilers (370mm?)

[Gonesoaring2003]

I'll have to look what size they are tomorrow, the span is 2.6m and the brakes were already fitted as part of the kit - unusual for Multiplex to get it wrong?I'm sure the brakes are fully extending - the actuating arms are reaching vertical.

[Phil.Taylor]

FWIW - Stop thinking of those "airbrakes" as car brakes - they are not intended to slow the model downwhat they do is increase the drag, which steepens the glide angletry it "full size" style - you control the speed with the elevator, and control the descent rate / glide angle with the "airbrakes" and - talk to Bobbyr about what settings to use for spoilerons for landing the Speedo - he's the Speedo expert! Phil.

[Woodstock]

Phil.Taylor said:

FWIW - Stop thinking of those "airbrakes" as car brakes - they are not intended to slow the model downwhat they do is increase the drag, which steepens the glide angletry it "full size" style - you control the speed with the elevator, and control the descent rate / glide angle with the "airbrakes" Phil.

I know this to be true, and landing my "spoilers only" planes seems to occur at a considerable speed, and you can also clearly see the steepening effect the spoilers have on the glider slope. However, I was just thinking about this (I know, I know, I most stop doing that) - if there's additional drag, there HAS to be some slowing down of the plane.  A glider with spoilers deployed is never going to fly as fast as one with a clean wings, is it?

[Phil.Taylor]

Woodstock said:

Phil.Taylor said:

FWIW - Stop thinking of those "airbrakes" as car brakes - they are not intended to slow the model downwhat they do is increase the drag, which steepens the glide angletry it "full size" style - you control the speed with the elevator, and control the descent rate / glide angle with the "airbrakes" Phil.

I know this to be true, and landing my "spoilers only" planes seems to occur at a considerable speed, and you can also clearly see the steepening effect the spoilers have on the glider slope. However, I was just thinking about this (I know, I know, I most stop doing that) - if there's additional drag, there HAS to be

some

slowing down of the plane.  A glider with spoilers deployed is never going to fly as fast as one with a clean wings, is it?

Chris - if you want to do some thinking on this - you need to be thinking about the balance of lift, drag, weight on the glider - heres a pic I didnt drawhttp://wright.nasa.gov/airplan.....dlrat.htmladd more drag, and the lift vector needs to tilt forwards more to balance it - and so the glider is now on a steeper glide pathhope that makes sense? (I'll leave you to do the maths)Phil.