Jump to content
Phil.Taylor

Voltij "slim"

Recommended Posts

Phil.Taylor

The Voltij flies great - really agile & real precision aerobatics (*) - but its no speed demon with the fat fishy fus & thick blunt section fin. I sometimes wonder how it would fly if it were skinny - ok, no knife edge, but probably more speed & energy for other moves - with of course the symmetrical MG05 camber changing airfoil.  Then... a cheapo Typhoon fus appeared on fleabay last week - had to be done! So - its now a "project" - which just might take a while - because the Typhoon fus is missing the fin - presumably the boom broke, as they do, then a previous owner had a go at making it v-tail (i.e. bodge). I've got the rear end of a cross tail Crossfire which I can graft onto it, may be a bit oversized though - anyone got a Typhoon fin from a trashed Typhoon maybe? (will post a wanted ad too)

Comments welcomed - heckling - beer - whatever...

Phil.

(* now with a crazy mad-stab setup for flip loops - but that's another story...)

Voltij_Phoon_1.thumb.jpg.498a5362703089ead6e89b28fe554f37.jpgVoltij_Phoon_2.thumb.jpg.00670a870ff87e0676fbd71a0b91e57e.jpg

 

Share this post


Link to post
Share on other sites
SilentPilot

Should go like a Minivec :D

 

Share this post


Link to post
Share on other sites
MikeDaBike

I've got one I think in yellow ather the fuselage snapped just before the tail. Will take a look this evening when I get home

Share this post


Link to post
Share on other sites
stewartg

I agree the fuz and fin look draggy but they say that 90% of drag is the wing so it will be interesting to see what difference a skinny fuz makes

An Aresti has far less side area than a Voltij but doesn’t seem to suffer in knife-edge, I think it’s about momentum and energy retention as the Aresti wing loading is likely to be higher than the Voltij

Do you have a ballast tube in your Voltij by any chance, the only way I can add weight to mine is with steel wing joiners and that only adds about 5oz and the wings bend enough with high G Aeros as it is

Wonder how to make the wings stiffer?

Share this post


Link to post
Share on other sites
Phil.Taylor
4 hours ago, MikeDaBike said:

I've got one I think in yellow ather the fuselage snapped just before the tail. Will take a look this evening when I get home

Thanks Mike !

Phil.

Share this post


Link to post
Share on other sites
Phil.Taylor
4 hours ago, stewartg said:

I agree the fuz and fin look draggy but they say that 90% of drag is the wing so it will be interesting to see what difference a skinny fuz makes

An Aresti has far less side area than a Voltij but doesn’t seem to suffer in knife-edge, I think it’s about momentum and energy retention as the Aresti wing loading is likely to be higher than the Voltij

Do you have a ballast tube in your Voltij by any chance, the only way I can add weight to mine is with steel wing joiners and that only adds about 5oz and the wings bend enough with high G Aeros as it is

Wonder how to make the wings stiffer?

Yep - Aresti is heavier & more heavily loaded (from what I've read)

Yep - I also use steel wing joiners for that little-bit-extra - have flown it in 50+mph winds - ballast would help energy, but at the risk of destroying the wings, which are built light with no spar.

Phil.

link below - flying in a 55mph wind - flying was ok, launching wasn't -  crazy...

 

 

Share this post


Link to post
Share on other sites
Sloper

Odd i always thought the VoltiJ was quite quick 🙄 but the fuz was awfully prone to breaking

 i remember Carpet Pete flying one in an F3F at HOH and getting a 42xx on par with the rest of us with our f3f kit

Share this post


Link to post
Share on other sites
wookman

All other things being equal, a skinny fuz will make a considerable difference. More speed and energy due to reduction in drag. I am surprised that 90% of drag comes from the wing!

Share this post


Link to post
Share on other sites
SilentPilot

Total drag (including lift induced) maybe upto 90% from the wing but I can't see it being a large proportion of profile drag.

Share this post


Link to post
Share on other sites
Woodstock

The Vj definitely has a rather sedate terminal speed.  But, I rather like that: it puts you in a different flying frame of mind.. I re-built my fuzz with a very heavy layup after a number of crashes, and used it thereafter only for strong conditions.  The heavy version didn't go any faster...

Share this post


Link to post
Share on other sites
Phil.Taylor

The appeal for fin parts came up good - many thanks Mike ! 👍

So - a bit of action with a hacksaw to remove the messy bodged end of the fus - and a trim down & tidy up of the tailboom part - then the tail part fits over the front part - simples!

Quick mock-up "garden fly" - looks promising - tailboom is a bit long because of the join overlap - but should make it track nicely

Phil.

Typhoon_tails.thumb.jpg.2d8af7f1c14eecdb2fa93405b1e46a0e.jpgVolti_Slim_1.thumb.jpg.f4c71a5c95af88015e5b83aecfa0d024.jpgVolti_Slim_2.thumb.jpg.3534dd96e6c7f3a9ab9bfb8a722e0f55.jpg

  • Like 1

Share this post


Link to post
Share on other sites
Witch_1

Fantastic idea, looks way better than the Voltij.  Planning on having dihedral to make landing safer?

Share this post


Link to post
Share on other sites
Phil.Taylor

Thanks!

dihedral? - nope - its a flattie - same ways up & upside down

  • Like 1

Share this post


Link to post
Share on other sites
SilentPilot

Put the dihedral on a Servo ;) 

Share this post


Link to post
Share on other sites
oipigface

How about making the fuselage profile deeper, so that it will knife-edge better?

  • Haha 2

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


  • Recently Browsing   0 members

    No registered users viewing this page.

×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.