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Search: Posts Made By: probligo
Showing results 1 to 25 of 354
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Forum: Aerodynamics
08-03-2004, 12:19 AM
Replies: 7
Views: 2,107
Posted By probligo

RE: ho229 wing profiles

You could also take a look for reports and magazine articles on a Horten IX built in Britain in the last three or four years and sporting twin gas turbines. I have had the privilege of seeing video...
Forum: Aerodynamics
07-25-2004, 12:42 AM
Replies: 30
Views: 3,478
Posted By probligo

RE: Induced Drag

Every time I see a photo of a Hawk, I drool. I have my dribble sheet draped over the k/b right now...and that is just from thinking about it.

Actually elliptical dihedral is just the first...
Forum: Aerodynamics
07-24-2004, 01:27 AM
Replies: 30
Views: 3,478
Posted By probligo

RE: Induced Drag

Diverting just slightly...

One of the things that confused me, and which took a while to get straight in my head is the relationship -

Induced Drag > Velocity > profile drag.

As I...
Forum: Questions and Answers
07-22-2004, 05:09 PM
Replies: 6
Views: 880
Posted By probligo

RE: Sanding Block?

I looked at these myself and decided against using them. Why?

The fact that they are flexible.

If you want to get uniformity along a three dimensional shape such as a wing leading edge, ...
Forum: RC Gliders, Sailplanes and Slope Soaring
07-21-2004, 06:07 PM
Replies: 1
Views: 544
Posted By probligo

RE: tail length

No doubt there will be plenty of offers of fixed numbers for you to use.

Go to the Aerodynamics board and search on "tail volume". There are a number of threads on the topic and there will be...
Forum: RC Gliders, Sailplanes and Slope Soaring
07-07-2004, 03:19 PM
Replies: 9
Views: 3,300
Posted By probligo

RE: Flying wing?

http://www.b2streamlines.com

http://www.sielemann.de/ (German but English also)

http://www.zanonia-flyers.de/ (German)

Zanonia is the home of the CO series - some of the hottest wings...
Forum: Aerodynamics
07-07-2004, 02:38 AM
Replies: 15
Views: 5,050
Posted By probligo

RE: RES Airfoil Selection

ooopppss
Forum: Aerodynamics
07-07-2004, 02:36 AM
Replies: 15
Views: 5,050
Posted By probligo

RE: RES Airfoil Selection

What they said already PLUS -

Take a long and hard look at the construction methods used by Drela for Allegro and BD. If you also take a look at what the freeflight (F1A ) builders have been...
Forum: RC Gliders, Sailplanes and Slope Soaring
07-03-2004, 07:24 PM
Replies: 2
Views: 745
Posted By probligo

RE: Wing Joiner

Alternative -

Measure joiner opening in wing as suggested.

Measure depth of joiner using 1/32 wire or similar.

Use these measurements to build a mould from suitable material (3/16 or...
Forum: Composites Fabrication And Repair
06-29-2004, 08:12 PM
Replies: 9
Views: 1,949
Posted By probligo

RE: Need tricks on sanding down carbon fiber wing tube.

Again, amen to those who are saying "do not sand it..."

A thought for you, and following from Sensai above, is to sand out the wing tubes.

There are two reasons for this - one valid and...
Forum: Tips & Techniques
06-22-2004, 06:12 PM
Replies: 40
Views: 3,511
Posted By probligo

RE: Stronger epoxy

From my experience, the ONLY place for 5 minute epoxy is field repairs, where some positioning is required and ca would make a joint that is too brittle.

I can also relate (from direct...
Forum: RC Gliders, Sailplanes and Slope Soaring
06-21-2004, 02:02 PM
Replies: 2
Views: 1,103
Posted By probligo

RE: Rib spacing

As Bruce has hinted, some more detail would help.

Things to think about in making these decisions are -

Span
All up weight
Wing section (rib shape)
Lauch method

All of...
Forum: RC Gliders, Sailplanes and Slope Soaring
06-19-2004, 05:42 PM
Replies: 21
Views: 2,485
Posted By probligo

RE: Scale olde non-lead sled

There are a number of plans for this style of glider available on the market already. Look for Sunspot, Thunderking, and Leprechaun. Sunspot was originally 13 foot span ff open glider, the others...
Forum: Aerodynamics
05-21-2004, 03:11 AM
Replies: 3
Views: 507
Posted By probligo

RE: Spoilers

If it helps, the biggest set I have seen were on a 16' span scale glider. The blades, top and bottom, were 1.5" deep and 30" long, made from 1/16 dural (aircraft grade no doubt - ex RNZAF).

...
Forum: RC Gliders, Sailplanes and Slope Soaring
05-18-2004, 03:43 PM
Replies: 9
Views: 1,224
Posted By probligo

RE: Help with C G

With a swept leading edge, I would be very careful not to get any further forward than Landi's suggestion.

How does it fly at the "somewhere just forward of 50%"? I bet it is a bit "twitchy"...
Forum: Aerodynamics
05-18-2004, 03:32 PM
Replies: 13
Views: 2,296
Posted By probligo

RE: Organic Design

Maybe there is hope for my brick sh--house building standards yet...:D:D:D
Forum: Beginners
05-10-2004, 07:17 PM
Replies: 39
Views: 2,109
Posted By probligo

RE: I am addicted now, this is nuts!

Welcome to the nuthouse...:D:D:D:D::D::D::D:
Forum: Composites Fabrication And Repair
04-27-2004, 04:22 PM
Replies: 4
Views: 1,452
Posted By probligo

RE: Joining carbon fibre tubes - dihedral !?

Think about using 1.5mm birch ply dihedral keepers - like the old style ff models :D:D:D use two for each join, one each side of the spars, and epoxy in place. Run the keepers 2 ribs either side...
Forum: RC Gliders, Sailplanes and Slope Soaring
04-26-2004, 03:59 PM
Replies: 7
Views: 756
Posted By probligo

RE: HLG Control Rods?

Bob,

Some of this "fancy" stuff is not as expensive as you might think.

Teflon tube should be cents per foot at the right source.

Carbon rod is used by the kite fraternity - follow up...
Forum: RC Gliders, Sailplanes and Slope Soaring
04-13-2004, 11:55 PM
Replies: 2
Views: 1,922
Posted By probligo

RE: !!! Composite Flying Wing !!!

Before you get too far down the track, see if you can get a hold of the AMI (Aircraft Modeller International) for March.

There is an article in that on "ribless D-box construction". Now while...
Forum: Aerodynamics
04-13-2004, 11:40 PM
Replies: 19
Views: 1,933
Posted By probligo

RE: Pics from tunnel testing

My guess is that the high tail is to avoid the problems that BAC had with the 1-11.

On the BAC1-11, with deep wing stall all rudder and elevator control was lost due to the turbulence covering...
Forum: RC Gliders, Sailplanes and Slope Soaring
04-07-2004, 03:25 AM
Replies: 6
Views: 3,530
Posted By probligo

RE: Flying wing airfoil???

http://aerodesign.de/english/profile/profile_s.htm
Forum: RC Gliders, Sailplanes and Slope Soaring
04-05-2004, 07:31 PM
Replies: 8
Views: 2,044
Posted By probligo

RE: RC "ultralight" glider

It is a neat idea. A mate of mine is using a cheap 2ch set with the rx strapped to the fuse under the wing. He uses that to drive the autoservos that he is using for circle tow / dt testing. Once...
Forum: Aerodynamics
03-26-2004, 04:03 PM
Replies: 13
Views: 2,877
Posted By probligo

RE: Free floating wing?

Thanks from me too for re-connecting me with this fascinating beastie. I first came across is about 4 years back on scaledcomposites.com. At that time it was one of their lesser presentations.

...
Forum: RC Gliders, Sailplanes and Slope Soaring
03-15-2004, 06:59 PM
Replies: 7
Views: 2,366
Posted By probligo

RE: Tow hook for Zagi

I go with that.

Just to add a little bit more to it -

I have seen a standard hi-start used in similar fashion with 2M wings. The principle I am told is to get the wing (Zagi) to carry no...
Showing results 1 to 25 of 354
 
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