HobbyKing.com New Products Flash Sale
Reply
Thread Tools
Old Oct 04, 2012, 10:16 AM
Slipping the Surly Bonds
dz1sfb's Avatar
Attica, MI
Joined Dec 2006
10,382 Posts
The 150 sq. in rule gives 29" wingspan on the Vampire, but I forgot to check the distance between the booms. Doing that now. Okay, I have clearance for a 6" propeller (6.6395").

I was thinking a 5mm carbon tube inside a 3 layer lamination with the vertical stab as part of the center lamination.

Ken
dz1sfb is online now Find More Posts by dz1sfb
RCG Plus Member
Latest blog entry: Mini H Quad Project
Reply With Quote
Sign up now
to remove ads between posts
Old Oct 04, 2012, 10:25 AM
Allways the hard way!
georgy's Avatar
South Africa, GP, Germiston
Joined Jan 2012
407 Posts
Quote:
Originally Posted by DKChris View Post
......the dental drill sound would be inevitable.....but what the heck.....
YEAAHH BABY

My sport slot-jet is louder than a hot nitro! Gives a real raw power feel

Not park friendly though

George
georgy is offline Find More Posts by georgy
Reply With Quote
Old Oct 04, 2012, 10:59 AM
Danish? Don't U eat that??
DKChris's Avatar
Denmark
Joined Jan 2008
238 Posts
Quote:
Originally Posted by dumb_thumbs View Post
One jet that might work well for combat is the Vampire.
-Heath
I now see i'm not first with the idea......

Quote:
Originally Posted by dz1sfb View Post
I was thinking a 5mm carbon tube inside a 3 layer lamination with the vertical stab as part of the center lamination.

Ken
Sounds a bit heavy to me, but I think i'm doing the error of having my mind set on indoor plane construction, where you need a rather tight turning ability - I'd most likely go for 150-180g AUW (Or less if possible) at 29".............maybe I should go over the thread again.......

Your idea would be strong though.....Probably suitable for a park model.
DKChris is offline Find More Posts by DKChris
Last edited by DKChris; Oct 04, 2012 at 11:33 AM.
Reply With Quote
Old Oct 04, 2012, 12:06 PM
For us He died, in me He lives
Jimmy JFlyer's Avatar
United States, MI, Saint Clair Shores
Joined Dec 2008
5,111 Posts
Wow Ken, I been away from RCG so long, I didn't even know this thread was here. Looking forward to reading thru this one for sure.

Jimmy JFlyer is offline Find More Posts by Jimmy JFlyer
Reply With Quote
Old Oct 04, 2012, 01:16 PM
Slipping the Surly Bonds
dz1sfb's Avatar
Attica, MI
Joined Dec 2006
10,382 Posts
More Vamp!

Ken
dz1sfb is online now Find More Posts by dz1sfb
RCG Plus Member
Latest blog entry: Mini H Quad Project
Reply With Quote
Old Oct 04, 2012, 01:48 PM
Danish? Don't U eat that??
DKChris's Avatar
Denmark
Joined Jan 2008
238 Posts
Looking seriously nice............good proportions!
DKChris is offline Find More Posts by DKChris
Reply With Quote
Old Oct 04, 2012, 03:10 PM
Allways the hard way!
georgy's Avatar
South Africa, GP, Germiston
Joined Jan 2012
407 Posts
Ok, I'm confused. Is this Vampire designed to fly "elevons" only? Like a wing-type airframe?
Do you then deliberately "under-size" the horisontal stab & "over-size" the ailerons?

I saw you flew the Hunter like that Ken... boggles my mind!

George
georgy is offline Find More Posts by georgy
Reply With Quote
Old Oct 04, 2012, 04:07 PM
Slipping the Surly Bonds
dz1sfb's Avatar
Attica, MI
Joined Dec 2006
10,382 Posts
George,
I am interested in flying the Vamp on elevons only. It should be quite stable as the fixed elevator will dampen the response. In the case of elevator size I increased the chord by 10% as well as the vertical stabilizer area.

I want to try this out this way first since servo space is tight and I am constrained to use dual aileron servos on this design. However a functional elevator is not out of the equation. I will test it both ways. CG may be a challenge on this one with a pusher motor and a relatively short nose.

Ken
dz1sfb is online now Find More Posts by dz1sfb
RCG Plus Member
Latest blog entry: Mini H Quad Project
Reply With Quote
Old Oct 04, 2012, 08:57 PM
Slipping the Surly Bonds
dz1sfb's Avatar
Attica, MI
Joined Dec 2006
10,382 Posts
VLF Vamp

I was not real happy with the looks of the PLF style fuselage on the Vampire, so I figured a VLF on would be much sharper.

Ken

Build Log 06-OCT-2012: Cut the prototype kit this evening. Seems quite easy to assemble. Will post plans and build guide here.

Build Log 09-OCT-2012: Started assembling the kit today. Got the canopy, fuselage center and left hand outer laminations glued up.

Build Log 10-OCT-2012: Finished the fuselage laminations, built up the wing, and glued up the boom sub-assemblies. Dry fitted sub-assemblies. Presanded the subs, and glued up the entire airframe. Finish sanded, added firewall, servos, motor, esc, and rx. Finished battery retention magnet installation.
dz1sfb is online now Find More Posts by dz1sfb
RCG Plus Member
Last edited by dz1sfb; Aug 11, 2013 at 09:21 AM. Reason: added plans
Reply With Quote
Old Oct 05, 2012, 04:16 AM
Allways the hard way!
georgy's Avatar
South Africa, GP, Germiston
Joined Jan 2012
407 Posts
QUOTE: The canopy comes off to access the electronics and battery.

Some nice innovation there!
With all those VLF layers this Vamp (with some detail sanding) will be much too nice for Combat!
a Few triangular pieces aound the intakes & you got a "stand-off scale" model....

If the elevons work out well it will also suit the BAC Lightning. It is basically an "interrupted" delta... I recall in one of my early posts 'bout the Lightning some-one posted that very set-up. Must go back & look.

Sure will help simplicity & weight saving (& $$$)

Waiting report on the elevon success...

George
georgy is offline Find More Posts by georgy
Last edited by georgy; Oct 05, 2012 at 05:06 AM.
Reply With Quote
Old Oct 05, 2012, 05:17 AM
Allways the hard way!
georgy's Avatar
South Africa, GP, Germiston
Joined Jan 2012
407 Posts
Found the short thread on BAC/EE Lightning with taileron & elevon discussion...

http://www.rcgroups.com/forums/showthread.php?t=1645907

George
georgy is offline Find More Posts by georgy
Reply With Quote
Old Oct 05, 2012, 05:59 AM
Danish? Don't U eat that??
DKChris's Avatar
Denmark
Joined Jan 2008
238 Posts
From the comments in the linked thread and gut feeling, i'm getting a hunch, that the elevon solution will get to be more interesting to operate, the further the tail gets away from the wing rear edge.......at some point it would actually make sense to reverse the elevator input, in reality working it as flaps......but where that point is.....good question...? And in between that point and the point where there's stable normal elevon control, the handling is very likely to be sluggish.......but I guess the only reasonable way to find out is to build a crude test model and try it out....
DKChris is offline Find More Posts by DKChris
Last edited by DKChris; Oct 05, 2012 at 06:18 AM.
Reply With Quote
Old Oct 05, 2012, 06:56 AM
Slipping the Surly Bonds
dz1sfb's Avatar
Attica, MI
Joined Dec 2006
10,382 Posts
One of the discoveries made flying the Hunter in both modes is that elevon setups require a further forward CG than a conventional setup. So this could be helpful to know with long nosed jets.

Ken
dz1sfb is online now Find More Posts by dz1sfb
RCG Plus Member
Latest blog entry: Mini H Quad Project
Reply With Quote
Old Oct 05, 2012, 07:38 AM
Allways the hard way!
georgy's Avatar
South Africa, GP, Germiston
Joined Jan 2012
407 Posts
Found this F-4 Phantom plan in the C/Line section... Ready-made VLF jobby. (Hope it's OK to re-post! Let me know, if not i will remove asap)

If you were to build this, would you put ailerons in-board or out-board of that famous wing dihideral? (or both?)

Full flying H-Stab? Or conventional fixed H-Stab + elevator split?

George
georgy is offline Find More Posts by georgy
Reply With Quote
Old Oct 05, 2012, 08:50 AM
Danish? Don't U eat that??
DKChris's Avatar
Denmark
Joined Jan 2008
238 Posts
Quote:
Originally Posted by dz1sfb View Post
One of the discoveries made flying the Hunter in both modes is that elevon setups require a further forward CG than a conventional setup. So this could be helpful to know with long nosed jets.

Ken
Makes sense; If the CG is placed more or less as if there was no stab surface(but still a vertical tail to balance the nose weight), It should fly like a wing only model, the tail would just dampen the elevator reactions a bit.
DKChris is offline Find More Posts by DKChris
Reply With Quote
Reply


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Build Log Sporterizing dz1sfb's Hawker Hurricane, SEMFF WWII Combat Plane. Freddie B Foamies (Scratchbuilt) 152 Dec 17, 2012 09:59 PM
Video Semff combat sortie 8/28/2012 mav913 Electric Plane Talk 2 Aug 29, 2012 11:29 PM
Discussion Indianapolis Area combat SEMFF WWII combat dman65 Electric Combat 1 Sep 12, 2010 12:35 PM