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MarketPlace Showcase F.A.Q (Last Updated: 2026 Oct 28 3:54 pm)
Variants of the XLR-11 rocket engine were used on many of the X-planes. With four combustion chambers and two landing assist solid rockets, the engine had some serious plumbing. This is a reasonable facsimile.

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It's for the X-24. It's initial flights were unpowered, dropped form a B-52 at high altitude to glide to a landing. On later flights, it used it's rocket engine to fly to an even higher altitude before gliding to a landing.

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DittoI love the level of detail. It looks to meet or exceed your usual high standards. Very much looking forward to this.l
Molly
Working up the landing gear. It's not clear how they retracted.

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Photographs of the wheel wells in the USAF Museum show fiendishly complex mechanisms. I'm trying to make understand them, while considering something simpler that makes mechanical sense.
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That's great, Molly. I hope you do get to visit the museum.
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Getting closer to the end. I still have a few details to complete, before the mesh is done.

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I think the rigging is complete. There's some complex control surface movement. So far I've found only one easily adjusted problem with the mesh. Now on to the big job of texturing.

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Packaging up, but still have work to do for the promo images.


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I love the details on the cockpit pannels and controls.
If you were to ever release modular control pannels and flight sticks not tied to a specific vehicle for kitbashing, I would be interested.
Also, this very much reminds me of a toy I had as a child.
All art is experimental. All life is art.
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If you were to ever release modular control pannels and flight sticks not tied to a specific vehicle for kitbashing, I would be interested.
I assume you're talking about small panels with a few gauges and panels with a bank or two of switches as Poser props. I could do that but I don't expect to have time before the end of the year. I've got a lot going on right now.
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Yes, retro style panels, gauges, switches, banks of switches, throttles, levers, flightsticks and/or large aircraft steering wheels. I love retro controls and would definately add those to my collection to kitbash craft with.
I've been improvising thus far...but if such products become available I would use them.
All art is experimental. All life is art.
Buy me a coffee, or some ramen?
I hope to get this all packed up by the end of the week. I expect to make the B-52 ["Boeing B-52 Stratofortress" (https://skfb.ly/oLo8p) by bohmerang is licensed under Creative Commons Attribution (http://creativecommons.org/licenses/by/4.0/).] and X-24 mounting pylon available as freestuff.

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Bad news. Looks like I need permission from the Air Force and NASA to use their logos. So there will be a long delay while I look into this, and If I have remove them make all the necessary changes.
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This sounds incorrect - I am curious where this came from? Especially in the case of NASA, as the logos have been available for public use for over four decades and public use was encouraged to help promote NASA's image in the public eye.Bad news. Looks like I need permission from the Air Force and NASA to use their logos. So there will be a long delay while I look into this, and If I have remove them make all the necessary changes.
All art is experimental. All life is art.
Buy me a coffee, or some ramen?
This is from Rendo, when I submitted the product:
"US Air Force Markings
• Permission Required: The US Air Force Symbol and official markings are registered trademarks.
•
Strict Prohibitions: Department of Defense and Air Force policies
prohibit using official insignia in any way that implies a commercial
endorsement.
• Commercial Sale: Reproducing these symbols on
merchandise requires a fully executed license agreement from the Air
Force Trademark Licensing Office. Selling 3D prints with Air Force logos
or wording without this license is a trademark violation.
NASA Logo and Branding
•
Not Public Domain: While general NASA photos and informational media
are often free to use, NASA identifiers—including the "meatball"
insignia, "worm" logotype, and seal—are protected by law under 14 CFR
1221.
• Approval Process: Commercial use of NASA identifiers on
merchandise is permitted only on a case-by-case basis through review and
approval by the NASA Office of Communications.
• Key Restrictions:
Even if approved, you cannot use co-branding (placing your own maker or
company logo next to the NASA mark), imply an official collaboration or
endorsement, or use the logos on prohibited categories like food,
cosmetics, or certain apparel. The NASA Seal is strictly reserved for
official agency use and is never allowed on commercial merchandise."
I see similar wording on the Air Force and NASA web sites. It does seem like overkill as I'm not selling a T-shirt with a logo. (It's possible that Rendo has been burned for something.) I've made permission requests to the AF and NASA. Mean while this is all on hold. The model would look terrible with big blank spaces.
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I haven't used any of the USAF trademarks listed in DAF Active Registrations (https://www.trademark.af.mil/Portals/73/Docs/DAF%20Active%20Registrations.pdf?ver=juNV9-bKYZl_KMlxGWokPg%3d%3d). I have used the NASA "meatball", the blue circle with "NASA" and red swoops.
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I glanced at the NASA and Air Force sites, and yes that is there, now. I kbow 15 years ago and prior that was not there, and the terms for using the logos were different. I do not have screencaps or backups though. It was the case that with U.S. armed forces logos, and NASA logos, being all were taxpayer funded agencies, the use of the logos was more open. It was never quite public domain, but as long as the logo use was not to imply endorsement, or sell commercial products such as printed materials, posters, clothing, etc... it was considered "fair use". 3D assets could be a gray area, but it seems rather draconian to me.
It looks like they may have tightened the terms. Why, I can not say.
I hope you are able to get this cleared up and get these products released.
All art is experimental. All life is art.
Buy me a coffee, or some ramen?
Good news! The X-24 is now in the test queue. Tima tells me that we'll address any issues if and when they arise.
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The Martin Marietta X-24 lifting body was a 1960s-70s experimental aircraft design to test spacecraft reentry and landing concepts. The X-24 was dropped from a B-52 at high altitude, and used its own rocket engine to fly to a higher altitude and then glide to an unpowered but controlled landing.
(The X-24 was inculcated on a page RFreise posted a while back.)
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