NASA Shuttle Tile Permits Bare-Hand Grip Fresh From 2,200F Oven

Space Shuttle Thermal Tile Demonstration — Roscket Tasartir

Roscket Tasartir

Extremely low thermal conductivity and rapid edge heat dissipation allow handlers to grasp glowing silica tiles bare-handed seconds after hours of 2,200-degree heating.

AI-assisted summary of Space Shuttle Thermal Tile Demonstration — original source. Check the original for full context.

Source published:

Key ideas

  • Space Shuttle thermal protection tiles heated to 2,200°F can be handled bare-handed at the corners almost immediately upon removal from an industrial furnace. (0:00)
  • The 9-pound-per-cubic-foot tile material dissipates surface heat rapidly while its interior retains an incandescent, molten-looking core. (0:25)
  • Higher-density 22-pound-per-cubic-foot material retains heat significantly longer, continuing to glow for hours after removal from the heat source. (0:57)
  • During atmospheric reentry, the Space Shuttle thermal protection system endures temperatures reaching roughly 2,500°F to protect the orbiter's aluminum skin. (1:13)

Detailed notes

## Background Published on YouTube by Roscket Tasartir on July 10, 2011, this video captures a demonstration filmed during a tour of the Kennedy Space Center. Recorded the day before the STS-135 launch of the Space Shuttle Atlantis—the program's final mission—the footage highlights how Space Shuttle thermal protection tiles insulate against extreme heat.

## TL;DR A presenter at the Kennedy Space Center demonstrates the extreme thermal insulation capabilities of Space Shuttle heat shield tiles heated in a 2,200°F furnace for several hours. While the raw 9-pound material continues to glow molten hot at its center, its low thermal conductivity and rapid heat dissipation allow its outer corners to cool almost instantaneously upon contact with the air. A visitor safely picks up the incandescent cube bare-handed by its corners without burning themselves, after which the presenter contrasts this rapid heat shedding with denser 22-pound tile material that retains heat for hours.

## Atmosphere & style The presentation carries an awe-inspiring, casual science-demo feel, balancing lighthearted humor with genuine technical wonder. The contrast between the intensely glowing, molten-hot block and the casual act of holding it bare-handed creates an immediate sense of disbelief and astonishment. The demonstrator remains relaxed and reassuring, fostering an engaging, educational atmosphere that brings the extreme physics of orbital reentry down to a tangible, hands-on level.

## Bulletin - [00:00](https://www.youtube.com/watch?v=Pp9Yax8UNoM&t=0s) Space Shuttle thermal protection tiles heated to 2,200°F can be handled bare-handed at the corners almost immediately upon removal from an industrial furnace. - [00:25](https://www.youtube.com/watch?v=Pp9Yax8UNoM&t=25s) The 9-pound-per-cubic-foot tile material dissipates surface heat rapidly while its interior retains an incandescent, molten-looking core. - [00:57](https://www.youtube.com/watch?v=Pp9Yax8UNoM&t=57s) Higher-density 22-pound-per-cubic-foot material retains heat significantly longer, continuing to glow for hours after removal from the heat source. - [01:13](https://www.youtube.com/watch?v=Pp9Yax8UNoM&t=73s) During atmospheric reentry, the Space Shuttle thermal protection system endures temperatures reaching roughly 2,500°F to protect the orbiter's aluminum skin.

## Key takeaways - [00:00](https://www.youtube.com/watch?v=Pp9Yax8UNoM&t=0s) Raw Space Shuttle thermal tile material was baked at 2,200°F for multiple hours to demonstrate its insulating capabilities. - [00:12](https://www.youtube.com/watch?v=Pp9Yax8UNoM&t=12s) Ordinary objects like frozen pizza would disintegrate within minutes in the 2,200°F oven. - [00:18](https://www.youtube.com/watch?v=Pp9Yax8UNoM&t=18s) Unlike metals, which melt or stay dangerously hot for hours, shuttle tile material has exceptionally low thermal conductivity. - [00:25](https://www.youtube.com/watch?v=Pp9Yax8UNoM&t=25s) The outer surface and corners shed thermal energy almost instantaneously upon exposure to room air. - [00:31](https://www.youtube.com/watch?v=Pp9Yax8UNoM&t=31s) The core of the tile remains glowing incandescent at over 2,000°F even as the exterior cools. - [00:43](https://www.youtube.com/watch?v=Pp9Yax8UNoM&t=43s) A visitor safely picks up a glowing block with bare hands by holding it strictly by the outermost corners. - [00:49](https://www.youtube.com/watch?v=Pp9Yax8UNoM&t=49s) Holding the material only at the corners is critical because those areas radiate heat into the surrounding air fastest. - [00:57](https://www.youtube.com/watch?v=Pp9Yax8UNoM&t=57s) Material density dictates thermal retention, with 22 lb/cu ft tiles glowing for hours compared to the faster-dissipating 9 lb/cu ft tiles. - [01:13](https://www.youtube.com/watch?v=Pp9Yax8UNoM&t=73s) The Space Shuttle's thermal tiles are designed to withstand atmospheric reentry temperatures reaching approximately 2,500°F.

## Detailed walkthrough ### [00:00](https://www.youtube.com/watch?v=Pp9Yax8UNoM&t=0s) Demonstrating Space Shuttle Thermal Tiles at 2,200 Degrees

During a demonstration at Kennedy Space Center, a presenter showcases the remarkable thermal insulation properties of raw Space Shuttle heat shield tile material. Displaying cubes of the raw 9-pound material that have been sitting inside an industrial furnace at 2,200 degrees Fahrenheit for several hours, he points out that they are glowing blazing hot. To put this extreme thermal environment into perspective, the demonstrator remarks that if a person put an ordinary frozen pizza in that oven, it would completely disintegrate within a couple of minutes. Metal placed in the same conditions would either melt outright or conduct and retain heat so intensely that no one could safely approach it for hours afterward.

Yet the shuttle tile material behaves entirely differently due to its exceptionally low thermal conductivity and rapid heat dissipation. Opening the oven and pulling out a glowing cube, the demonstrator highlights how quickly the outer edges release thermal energy, remarking, “It dissipates the heat so quickly that you can actually pick these up while they're glowing molten in the middle.” While the interior of the block continues to radiate an intense, molten incandescent glow from the 2,200-degree soaking, the surface corners cool almost instantaneously when exposed to the air.

- **Oven temperature:** The thermal tile cubes were baked at 2,200°F for multiple hours prior to extraction. - **Material grade:** Raw 9-pound-per-cubic-foot tile material without outer coating. - **Behavior comparison:** Unlike metals, which conduct heat throughout their entire mass and stay dangerously hot for hours, the tile material transfers heat so slowly through its structure that its exterior cools instantly to the touch.

[00:43](https://www.youtube.com/watch?v=Pp9Yax8UNoM&t=43s) Bare-Hand Handling and Density Comparisons

Confident in the material's properties, the demonstrator invites a visitor to pick up one of the incandescent blocks bare-handed to take a photo, emphasizing precise handling technique: “Just make sure you don't pick it up on the edges, just at the at the corners.” The visitor successfully grasps the block by its outermost corners without gloves, feeling warmth but suffering no burns despite the core still glowing brightly at over two thousand degrees. The demonstrator commends the visitor, noting, “That's perfect technique right there.”

The presenter goes on to explain how varying the density of the silica tiles alters heat retention and radiation. While the lighter 9-pound material sheds surface heat almost immediately, denser blocks behave differently. Pointing toward a block made of 22-pound-per-cubic-foot material, he jokes, “Look at that, that's the 22 lb per cubic foot—it's going to glow for hours; you could come back after dinner and roast marshmallows on that.” Connecting the demonstration back to spaceflight reality, he explains that during atmospheric reentry, the Space Shuttle's thermal protection system endures temperatures reaching up to approximately 2,500°F while successfully insulating the orbiter's aluminum skin underneath.

- **Handling technique:** Handlers can touch the block safely by touching only the extreme corners, where heat radiates into the surrounding air fastest. - **Material density contrast:** - *9 lb/cu ft material:* Emits surface heat extremely rapidly, permitting direct contact at the corners seconds after leaving a 2,200°F oven. - *22 lb/cu ft material:* Retains internal heat much longer and continues to glow for hours. - **Reentry conditions:** Space Shuttle orbiters experience atmospheric reentry temperatures climbing to roughly 2,500°F.

## Mentioned Kennedy Space Center, Space Shuttle, Space Shuttle Atlantis, STS-135, NASA

## Video description Recorded this video during my KSC tour 1 day before the launch of the Atlantis Space Shuttle for STS-135, the last Space Shuttle mission.

==Updated June 3, 2013== Thanks everyone for your interest and positive responses to this video! I just want to reiterate that this video may be used and reproduced for non-profit, educational purposes, so long as citation is given back to this YouTube video. For for-profit licensing and commercial usage, contact licensing@viralhog.com.

For information about the Space Shuttle thermal tiles, how they work, what they are made of, and other thermal insulation used on the Space Shuttle, check out this very informative brochure here: http://www.nasa.gov/centers/johnson/pdf/584728main_Wings-ch4b-pgs182-199.pdf

[Source](https://www.youtube.com/watch?v=Pp9Yax8UNoM)

中文简报

NASA航天飞机隔热瓦刚出2200华氏度烤箱即可徒手抓取 极低的热导率和边缘极快的散热速度，使操作人员在经过数小时2200度加热后仅数秒就能徒手抓取发红的二氧化硅隔热瓦。 肯尼迪航天中心的一位讲解员展示了在2200华氏度炉中加热数小时的航天飞机隔热瓦的极致隔热性能。尽管这种原始的9磅材料其中心仍如熔融般炽热发光，但其极低的热导率和快速的散热能力使其外边角在接触空气后几乎瞬间冷却。一名参观者徒手捏住炽热立方体的边角将其安全拿起而未被烫伤，随后讲解员将这种快速散热性能与能保温数小时、密度更大的22磅隔热瓦材料进行了对比。 加热至2200华氏度的航天飞机防热瓦从工业炉中取出后，几乎可以立即徒手拿取其边角。 (0:00) 这种密度为每立方英尺9磅的隔热瓦材料表面散热极快，而内部仍保留着炽热且呈熔融状的核心。 (0:25) 密度更高的每立方英尺22磅材料保温时间显著更长，脱离热源后可持续发光数小时。 (0:57) 在大气层再入期间，航天飞机的防热系统可承受高达约2500华氏度的温度，以保护轨道器的铝制蒙皮。 (1:13)

Reading summary

A Kennedy Space Center demonstration illustrates that raw Space Shuttle thermal tiles can be handled bare-handed seconds after emerging from a 2,200°F furnace due to exceptionally low thermal conductivity and rapid surface heat dissipation. Thermal Insulation and Surface Heat Dissipation (0:00) During the Kennedy Space Center presentation, raw nine-pound-per-cubic-foot tile cubes were extracted from an industrial furnace after baking at 2,200 degrees Fahrenheit for several hours. Under such conditions, an ordinary item like a frozen pizza would disintegrate within minutes, while metal would either melt or conduct and hold dangerous levels of heat across its entire mass for hours. In contrast, the uncoated shuttle tile material conducts heat through its structure so slowly that its outermost surfaces release thermal energy almost instantaneously upon contact with cooler ambient air, even while the center remains incandescent and glowing. Handling Techniques and Density Differences (0:43) Because the material sheds heat fastest at its exposed extremities, handlers can safely grasp the incandescent blocks bare-handed by carefully touching only the extreme corners, experiencing mild warmth without suffering burns. The presenter noted that performance varies significantly with material density: while the lighter nine-pound-per-cubic-foot formulation cools on its surface right away, denser 22-pound-per-cubic-foot blocks retain thermal energy and continue glowing for hours. In operational spaceflight, these insulation properties allow the Space Shuttle's thermal protection system to endure atmospheric reentry temperatures climbing to approximately 2,500°F while shielding the orbiter's underlying aluminum skin. The demonstration shows that the silica tiles effectively isolate extreme heat to protect spacecraft structures during reentry, though safe bare-handed contact relies strictly on precise handling at the corners where thermal radiation is most rapid.

精炼阅读摘要

在肯尼迪航天中心（Kennedy Space Center）的一场演示中，讲解员证实航天飞机隔热瓦材料在2200华氏度炉温浸烤数小时后，因极低的热导率与极快的热散逸能力，表面尖角可被徒手安全抓握。该类防护材料在航天飞机重返大气层承受高达约2500华氏度的极端高温时，能有效阻隔热量并保护内部的铝制机身蒙皮。 极端耐热性能与快速热散逸机制 (0:00) 在演示中，未涂覆外层涂层的9磅/立方英尺原始隔热瓦立方体在工业烤箱内经历2200华氏度（约1204摄氏度）长达数小时的烘烤，整体呈现出内部熔融般的炽热红光。讲解员指出，普通冷冻披萨置于该环境中会在数分钟内彻底碳化瓦解，而金属材料则会熔化或在整个体积内高效导热并蓄热，导致数小时内人员都无法安全靠近。 与金属的导热特性不同，该硅质隔热瓦材料具有极低的热导率和极快的热量散逸速度。从烤箱中取出后，热量在材料结构内部传递极为缓慢，而直接暴露在空气中的外边缘与尖角区域能近乎瞬间释放热能。这使得块体核心在持续发出极高温红热状态的同时，表层局部区域已迅速降至安全温度。 徒手接触技巧与材料密度对比 (0:43) 讲解员在现场指导参观者在不佩戴手套的情况下徒手抓取红热的隔热块。操作关键在于严格限定接触部位为最外侧的尖角，因为该位置的热量向空气辐射散失最快；参观者在握持时仅感受到温热而未被灼伤。讲解员强调必须避免触碰边缘平面或靠近核心的区域。 隔热材料的密度对其热量存留与释放有显著影响。相比9磅/立方英尺材料在出炉后数秒内即可触碰角部的特性，密度为22磅/立方英尺的材料蓄热能力明显更强，其红热状态可持续数小时。讲解员指出，在航天飞机实际再入大气层期间，防热系统需要承受高达约2500华氏度的气动加热峰值，正是依托该材料隔绝热流，确保飞行器下层的铝合金蒙皮不受损害。 该演示直观呈现了低密度隔热瓦在静止空气中的极端隔热性能与温降特性；不过现场仅展示了材料出炉后的角部辐射散热，实际航天任务中防热瓦还需应对高达2500华氏度的高速气流冲刷与复杂气动环境。

Original transcript

[0:00] coting on them but what we do have is we [0:01] have the raw 9 lb material that we use [0:05] now these have been in there at 2200 de [0:08] for hours so you'll see they're blazing [0:10] blazing hot now most things if you put [0:12] in an oven like if you put a a frozen [0:13] pizza in it would be it would [0:15] disintegrate after a couple minutes [0:17] these things have been in there hours if [0:19] you put in metal it may if it if the [0:22] metal did not melt at least it would [0:24] conduct the Heat and keep the heat for [0:26] so long that you couldn't get near it [0:28] well you know within hours well look at [0:29] that [0:31] I mean you can take this [0:32] off it dissipates the heat so quickly [0:36] that you can actually pick these up [0:37] while they're glowing molten in the [0:39] middle and how hot are they well they [0:41] were they were in the oven at 2200 de [0:43] wow so you can go ahead you can pick [0:45] them up and take a picture just make [0:47] sure you don't pick it up on the edges [0:49] just at the at the corners just at the [0:51] corners I mean you I mean I just don't [0:52] want to get anybody uh there you go [0:54] that's it that's it that's perfect [0:56] technique right there now you'll feel [0:57] the warrant but yet you can touch it I [0:59] mean imagine 2200 de yet [1:03] now and the difference with the [1:05] densities is you'll see these lower [1:07] densities you'll see you know you'll see [1:09] how they can dissipate the heat well [1:11] look at that that's the 22 lb per cubic [1:13] foot it's going to Glow for hours you [1:14] could come back after dinner and and [1:16] roast marshmallows on that but uh these [1:18] emit the heat really rapidly I mean a [1:21] good example of how this works is that [1:23] the when the when the shuttle comes in [1:25] it gets up to about [1:26] [Music] [1:27] 2500° but yet the surf going