I cant believe that I have been getting email notifications on this thread for ALMOST 20 YEARS NOW !! 😂😂🤦‍♂️🤦‍♂️ wow ... im glad the Pubelar™ instructional video has managed to disappear off of the internet in the mean time however !!!


Voy

Woj, you MUST re-post the Pubelar video. So many have forgotten the ground breaking fiber reinforced epoxy techniques that you pioneered oh so long ago. Please re-post!!!! Save humanity!

This is getting to be scary all over again--bet the administrators blood pressure just spiked---20 years !!!????

They make blood pressure meds for that. They are cheap!

sorry man, I no longer have a copy of it. I am hoping that it came in useful at least in your days at NASA though. I'm not looking to take any credit , but i would hope this technology did end up making it into space eventually.


Voy

We should be responsible adults and pitch in for a home defibrator

The fuselage that just keeps giving
 

Here is yet another variant--always wanted some
https://cimg4.ibsrv.net/gimg/www.rcu...a0f2e13043.jpg
thing forward swept--extended the ass end to facilitate a trailing edge with the sweep angle I was looking for--wing needs more taper than shown--stabs will be V tail--this was a weekend fun project

Nice. Moves the aero center forward. But elevons may be too ineffective (too close to the CG). You would probably need to add some horizontal stabs in the back for good pitch stability/control. But it would look quite awesome!!!

epoxy is from US composites #635 thin epoxy 45 min pot It was about $1100 for 32 gallons last I ordered---great for moulds

You are on target with that--- and on forward swept --CLA needs about 35% compared to the normal 25%--tail volume on this sucks but I think I can make it work

I was thinking about that too. Two stiff square section rods sticking out back of the turb exhaust, swept away so they don't get too toasty, that support more aft verticals and the two horizontal stabs (with anhedral of course, so Travolta and Cruise will think it is bad-ass!!!!)

You know that might add to the cool factor

Oval cross-section tail booms with an inverted V-tail. Similar to the Starjet. May need strakes on the inside of the tail booms to augment pitch stability. The booms help with directional control. The forward section of the tail booms can contain the main landing gear, which retract to the rear, so as to not change the CG since the nose gear would retract forward. Thanks for the info on the epoxy, looks like it is less expensive than the Alphapoxy from Aircraft Spruce and Specialty.

I was just reading some of the old stuff--priceless--almost forgot about the helium filled Nomex--bet that's worth a buck--could I just use hydrogen--it's cheaper

The one and only from my files
 

a-pic of my Glasscat and a promo picture
https://cimg7.ibsrv.net/gimg/www.rcu...76b6fd4c45.jpg
https://cimg2.ibsrv.net/gimg/www.rcu...2f21735dda.jpg

I think I may still have a video of someone flying a completed model---VHS---from 20 years ago or longer

Would love to see the video. I have a video of a friend of mine flying one at the Deer Park, Washington, airport, in around 1994, and he said it was really tail heavy. That was before the new composite technology, and partially because of the pusher prop engine. It was built too heavy also, which is not what I did, he built it. Is your video of flying in your local area, and did you do the flying? The first test model I flew was in 1989 near Broomfield, Colorado, near where I was working in the control tower at the Jeffco airport, which had a Rossi .90 with a tuned pipe (really screamed), and a lady I was dating, who was a flight instructor at the airport, took the video of it. I still have it around here somewhere. She is now a captain with Frontier airlines flying the Airbus. It had 3 Estes "D" engines for rocket assisted takeoff, which ejected after burnout to save weight. The recommendation I gave in the last message was for your forward-wing-sweep version.

You sent me the video

Bwaaaaaaaahahahahaha

That needs to be on a T shirt!!!!

Was that the video of a black one being flown by a friend of mine, or with the rocket assist where it ran out of fuel? Also, what kind of resin do you use for the actual aircraft parts, the same as for the molds, and what release agent do you use, PVA?

As Mr. Matt once wisely said, somewhere in this mess, " just read all of this from the beginning and just let it wash over you"!!!

video was your friend--I use an expensive post cure epoxy from Germany---4-5 hr pot

You might want to check out the "Poly Epoxy" or "MGS" Epoxy from Aircraft Spruce and Specialty. It might be cheaper and is a structural epoxy for full-size aircraft. Also, if you use PVA for a release agent, is there a kind of wax or other substance that keeps the PVA from beading up, or do you use a different release agent, such as Freekote?

I've found brushing on PVA will keep it from beading up on a waxed surface. The trick is when you initially brush the PVA on it will bead up but if you continue to brush it, and brush it, and brush it, the PVA will thicken slightly and coat the part.

I think it may make a difference if you do not buff up the waxed part, just rub on the wax in a thin layer, then apply the PVA. If you buff the wax, it makes a slicker surface for the PVA to bead up on. Do you think that is correct? Have you tried that? I have not experimented with it, but it may be interesting to see if it makes a difference. I have used spray can Freekote, or similar, with good results, and you can make 4 or 5 parts without having to re-apply, as it imbeds into the mold.