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Old Oct 28, 2011, 01:28 AM
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That looks great !
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Old Oct 28, 2011, 05:29 AM
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Therwil, BL, Switzerland
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In the top left of the Rhino screenshot it says "Undoing Drag". Isn't that a nice coincidence?
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Old Oct 28, 2011, 09:35 AM
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United States, NC, Raleigh
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Tom, that fuse looks awesome!

I had to edit my excitement a bit.

Eric
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Old Oct 28, 2011, 10:20 AM
a.k.a. Matt Nelson
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Tom - you just keep making it better and better! I'm really looking forward to playing with it!
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Old Oct 28, 2011, 05:51 PM
hot air rises...
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Pleasant Grove, UT
Joined Jul 2005
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Tom, awesome work! I'm sure I could probabaly find it in your other thread, but I get lost in there so I'll ask here ... are you using a poly bladder or clown balloon on your fuses?
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Old Oct 28, 2011, 06:07 PM
Father of Fr3aK, DLG Pilot
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USA, OH, Worthington
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Clown balloon. I tried the poly bladder thing and it just wasn't worth the effort for what I'm doing.

You can actually see the (black) balloon still on the stem in one of these pictures, next to the molds on the table.
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Old Oct 31, 2011, 10:16 PM
Father of Fr3aK, DLG Pilot
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Four more hours gone tonight prepping molds and laying up the first part. Flight tests this weekend at the BSoA hopefully. I'll take some "old" tails too just in case these don't work out as well as we expect.

For reference, the tail core was shaped by hand in about 15 minutes from rohacell 31igf. If it works out, I'll tool up the vacuum hold etc to do these on the CNC.

Target weight for this horizontal is around 7.5g. I wasn't aggressive at all on weight since I want to be certain to have a flyable part for the weekend.
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Old Nov 01, 2011, 08:31 AM
Aurora Builder
United States, MD, Lusby
Joined Nov 2003
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Looking great Tom!

I guess I better get with the times and order some 1oz kevlar for tail and wing hinges, tape is soooo much easier to work with though!
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Old Nov 01, 2011, 08:34 AM
Father of Fr3aK, DLG Pilot
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Just use 1.7 if you have it around. Only reason I used the 1oz stuff here is because I found some stashed that I had forgotten about.
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Old Nov 01, 2011, 10:47 AM
Father of Fr3aK, DLG Pilot
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Here we go... new horizontal ready for testing today and this weekend. Weight is 8.2g (heavy first pull) but should easily get down into the low 7s when I'm sure it is what we want.

Even the "quickie" mold worked out great and produced a mirror surface finish.

The goal of the new horizontal is to give added authority for pushover at the top of the launch, while reducing drag in the launch phase and in thermal turns. Gerald can elaborate on what tricks he used to get the drag further reduced if he'd like.

I will give feedback to Gerald after this weekend's contest... CG changes, incidence issues if any, and how the airplane trims and feels. I have a very good feeling about this change.
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Old Nov 01, 2011, 10:54 AM
Aurora Builder
United States, MD, Lusby
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Sweet! Yeah, those Freak foils are RIDICULOUSLY thin! Super super responsive though.
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Old Nov 01, 2011, 11:10 AM
Father of Fr3aK, DLG Pilot
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Yeah Sam. Gerald and I spoke for a while about the thickness this morning. I went overboard on the spars on this one because I was "freaked" about it being too thin

As it turns out, I think the thickness is perfect. It's far stiffer than I thought it would be...

and with that being said: I just got off the phone with Barry Kennedy of Kennedy Composites and he gave the okay to let the cat out of the bag. I have received a shipment of spread tow material from him that is the material used in the making of the Maxa and ST Blasters. It's roughly 45g/sm average and uses a couple of layers on a +/- 30 degree overlay. I'll be trying to complete a wing from this material prior to Phoenix but don't hold your breath... My estimation is that this material will remove somewhere around 12g from my wing weight, putting the wing at under 135g with servos, without likely losing much if any stiffness.

Here are some pictures of my current parts on the new material. I'm not sure what availability Barry has of this stuff, but it should produce some wonderful airframes. I'll post a thorough build / review of the materials as I get this first wing together.
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Old Nov 01, 2011, 12:04 PM
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Fantastic, glad to hear you are getting stiff parts! I had to switch to HL60 and 12K uni-carbon spar caps on the Freak horizontal to keep it stiff enough. I was trying to use 25 psi foam and 0.8mm carbon rods for spars but the thickness prevented that method, and the weight savings turned out to be marginal (0.25-0.5g max).

That spread tow looks nice, different from the Textreme, it looks a little less clean and possibly tougher to work with? I am also in the process of acquiring spread tow, will keep the community posted when something definite happens.
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Old Nov 01, 2011, 12:12 PM
Team Hong Kong F3K
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Hong Kong
Joined Sep 2010
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Tom, I'm still drooling over your creations, can't wait to see some parts done in that spread tow! I was reading up the Maxa thread too, and couldn't help but wonder how it would work on DLGs (well, obviously it's working well on the B3!)

Hope they become more available in the near future.
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Old Nov 01, 2011, 04:48 PM
Father of Fr3aK, DLG Pilot
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USA, OH, Worthington
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"Half in the bag"

More pictures. I got home about 4:30 and jammed one in the bag with the new material. I have to admit... I had everything primed and ready to go anticipating the arrival.

The stuff is a bit testy to work with but not so bad if you're used to working with light composites.

I won't keep you waiting for long Thomas

I plan on banging out the bottom skins tonight and joining tomorrow. With 24 hours in the box I should at least have this along at PHX even though I may not have servos in it yet.
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Last edited by tom43004; Nov 01, 2011 at 04:54 PM.
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