VISTA v2 - a slippery pitcheron

[bracesport]

well here we go for 2020 - I have a (Ridge Rat) pitcheron prototype on the bench and it looks exciting - this has got the creative juices flowing to design something sexy - I love the Jester V-tail and the Xica T-tail is pretty nice too - I will use these two as the inspiration for a new carbon fibre braided fuse over a 3D printed former - I hope my friend @jonoashton will build one too - I can make the fuselage formers and we can hopefully get together and make some composite wings!

Some inspiration and preliminary CAD.

 

[Wildthing]

I watched that video, it is pretty cool. I like how it comes apart and you can almost put it in your pocket

 

[mach1 rc]

I watched that video, it is pretty cool. I like how it comes apart and you can almost put it in your pocket

+1

 

[bracesport]

@Wildthing - it is certainly part of the appeal - I will try and replicate the kitset assembly and see if I can make something sexy without the pricetag!

 

[Wildthing]

@Wildthing - it is certainly part of the appeal - I will try and replicate the kitset assembly and see if I can make something sexy without the pricetag!

It is fast to

 

[Michael9865]

@Wildthing - it is certainly part of the appeal - I will try and replicate the kitset assembly and see if I can make something sexy without the pricetag!

That is one gorgeous airplane, but that price tag. Amazing that it had a hundred foot spiral and survived with only a damaged servo arm. Definitely want to follow your thread and learn a lot.

 

[LitterBug]

Very similar to the 3D printed, powered Eclipson Model-V I'm working on.

Love this profile

LB

 

[bracesport]

some progress on the V tail while I am thinking about the wing!

 

[Wildthing]

some progress on the V tail while I am thinking about the wing!

View attachment 153563 View attachment 153564 View attachment 153565 View attachment 153566

Here we go, I can see the smoke from here.

 

[bracesport]

hehe!

 

[Piotrsko]

Oh well, time for two more nails on the wall.

 

[Wildthing]

Oh well, time for two more nails on the wall.

And another wall

 

[Piotrsko]

Hey @Wildthing , whatever you did last time to get him flying, do it again, it's like july 4th weather there right now

 

[Wildthing]

Hey @Wildthing , whatever you did last time to get him flying, do it again, it's like july 4th weather there right now

I think we have to unplug his computer some how or setup some parental controls for it so we can lock him out or limit the amount of hours allowed per day.

 

[bracesport]

Based on some great input from some experts, here is the first cut of the wing design using some modern aerofoils - I used an SD7003 semi-symmetrical section at the root and an SD 8020 symmetrical section at the tip! Currently, the root is 175mm and the tip is about 110mm and the thickness is roughly 15mm at 30%!

From the experts - First a bit of debunking - despite appearances, there is no advantage whatsoever in twisty wings. The control response is worse than ailerons, the drag is greater than an aileron equipped wing, and you have a vulnerable mechanical contrivance that also can be a bit delicate if not treated with respect (and luck), However, they are neat and look clean (even if they are not). In this design, you first have to decide how far you want to go. Design? Of course, you really want a cool looking model plane with hard to break twisty wings that are completely aerobatic and can do VTPR, but is light, and can thermal like and F3j and also fly in 1Mph winds. Oh, and by the way, you also want a new Ferrari Roma for US$10,000. There is only one problem with those wants - they are impossible. So you can make a model that will do everything you want, kinda, but only one or two of the wants really well. This has some bearing on choosing the aerofoil sections. The closer you get to a fully symmetrical section - the better your aerobatics potential will be, the worse your low wind performance will be. The thinner your section is, the faster your plane will be - but not so good with aerobatics or low wind wants. etc etc.

 

[Wildthing]

Very pretty, now take some of those guys off the wall and go flying, still haven't seen the Spit go

 

[bracesport]

a small tweak to taper the wingtips - looks better now!

 

[bracesport]

This project is a longer-term 2020 initiative (hopefully with my flying buddy @jonoashton) - I can not fly at work, but I can still use my CAD!

 

[Piotrsko]

Gonna tip stall like you wouldn't believe.

" Rastisfrassen musta rastisfrasses sloper. " (Muttley, from Wacky Racers cartoons)

 

[bracesport]

@Piotrsko - I was guided to have a symmetrical tip section to assist in the avoidance of tip stall characteristics - what is your thinking to improve this design?