Tensor V2 - I smell burning EPS

[skyscraper]

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[g.collins]

Sweet skyscraper, shes coming on nice.
:) G

[Brucey]

Looking good

[Coyote]

Yes looking very smart :)

[Pasty]

I've hot wired a load of wings of all shapes and sizes but have never put twist in them... infact I've never put twist in any of my scratch built planes...

You dont need it dude, its just drag :)

looking good

I tried the laptop power supplies to start with, I couldnt find one that wasnt switching :(. I use a cheap 12v out door lighting power supply through a dimmer switch... works a treat.

[pk-surfing]

Twist = washout

A bit of washout in a wing is a good design feature.

It doesn't need to be much washout but it does mean as the angle of attack of the whole wing increases and the main section of wing starts to stall, the tips are still just below stalling and they let the plane 'mush' (my word for stall whilst going straight and down ?) rather than tip stalling.

I first became aware of it and it's benefits when I started building Keil Kraft balsa kits..... a long time ago !

PK

[Pasty]

I've hot wired a load of wings of all shapes and sizes but have never put twist in them... infact I've never put twist in any of my scratch built planes...

You dont need it dude, its just drag :)

I agree.. if the only goal is speed.

I have built wings without twist and with. Particularly high aspect ratio wings without twist will tipstall.  I wanted to make Tensor easy to fly, particularly at slow speed, without tip stalling.  The twist also gives positive stability and acts like a vertical fin too.

The top speed will be lower I agree but that is the tradeoff. This wing has slightly less twist than the first, so should go a bit quicker. If the low speed performance is ok, I'll shave a bit more off the next one.

I tried the laptop power supplies to start with, I couldnt find one that wasnt switching :(. I use a cheap 12v out door lighting power supply through a dimmer switch... works a treat.

Sounds great. What sort of wire do you use? I use single strand 0.5 mm stainless yacht rigging wire.

regards
Andy

yeah sure the properties of washout (twist) make the wing more stable and less prone to tip stall... I've never needed or wanted it ;)

I use 0.4mm stainless steel wire, I'll have a look at the label later if you want to try some.

[Pasty]

Twist = washout

A bit of washout in a wing is a good design feature.

thats personal preference, I dont like it and prefer to learn to fly within the planes limits and if it does tip stall I'll deal with it... thats all part of the fun!

[electrotor]

Unfortunately the EPP foam was too thin. I need 100 mm thickness, for the centre so I have had to stick to EPS. Its certainly nice stuff though. Maybe I will make a micro model with it!

Can you not reinforce the area with Correx?
Hmmm, on second thoughts getting an adhesive suitable for both plastics might be a problem.

There's always good old 1/16 or 1/32 ply.

[Brucey]

looking good Andy.

Have you been flying recently with Charlie?

[Brucey]

Yeah I look forward to another meet up at some point now the weather is a little better

[jiberjaber]

Looking good Andy :)

[jiberjaber]

Yes - I need a bit of a change of scene for flying, I now have a tracking ground station so a lot more range than before!  Just need some working VTX's to get back up in the air.

[Coyote]

Nice ! You gotta be happy with that Andy :)

[g.collins]

that's flying sweet mate, looks really smooth, great landing I won't one.
;) G