UP CLOSE Delta IV Heavy Launch Pad Tour (Tory Bruno CEO of ULA) - Smarter Every Day

Destin from Smarter Every Day introduces a unique opportunity to visit a rocket launch pad and interview Tory Bruno, CEO of ULA, a fellow rocket enthusiast who owns the company manufacturing the rockets.

• Three hours spent at the launch pad with extensive footage recorded • This is Destin's first opportunity to see an orbital rocket launch in person • Intimate mechanical rocketry conversations with Tory Bruno throughout the visit

Destin is granted permission to ride the Mobile Service Tower (MST) rollback with Tory Bruno, experiencing a 10 million pound building moving 330 feet at approximately one-third mile per hour.

Destin expresses deep appreciation for the unprecedented access and opportunity to witness rocket launch operations firsthand and ask technical questions at the actual launch pad.

Parker Solar Probe will reach speeds of 430,000 miles per hour near the Sun, traveling within 3.8 million miles of the solar surface, and will conduct this mission for seven years with approximately 24 passes around the Sun.

• Delta IV Heavy uses three cores: two outer cores at full throttle and one center core throttled back to conserve fuel • All three cores are identical, with the configuration comparable to bolting three rockets together • This design provides better propellant mass fraction after the throttled center core burns out

Parker Solar Probe requires a C3 (characteristic energy) of 154 kilometers squared per second squared to escape Earth's gravity and establish an elliptical orbit around the Sun, which is exceptionally high compared to typical missions.

Venus gravity assists will gradually reduce the spacecraft's perihelion from approximately 33 solar radii to within 3.8 million miles of the Sun through multiple orbital passes, with approximately every third Venus pass tightening the orbit further.

• All ULA rockets use cryogenic propellants on the upper stage • Delta IV uses hydrogen and oxygen on both first and second stages • Parker Solar Probe includes a custom solid-rocket kicker stage fabricated by Northrop Grumman's orbital ATK division

Hydrogen flows first to cool and spin up the engines, then ignition occurs, causing hydrogen to burn along the rocket's side and char it, creating the distinctive orange appearance during launch.

• Every mission is analyzed individually for propellant margins accounting for wind variability and trajectory variations • Minimum propellant reserves follow established standards based on calculations and operational experience • For Parker Solar Probe, the rocket will burn propellant to depletion for maximum performance

ULA rockets can recalculate and reprogram their flight trajectories in-flight, allowing adjustments after four months, enabling customers to reach either fixed destinations or variable targets depending on mission requirements.

• Cork insulation is used on the rocket exterior, ground into small pieces and bonded together with binder material applied in sheets • Spray-on polyurethane insulation called Sophia is applied thicker than cork for additional protection • Both materials serve dual purposes as ablators that burn away while removing heat and insulating the cryogenic tanks

Propellant continuously boils away and is vented from the cryogenic tanks during ground operations, making insulation critical to minimize this loss and maintain flight margins.

Cork prevents flaking by being ground up and bonded with a binder material, then applied in sheets and bonded to the rocket structure rather than used as solid cork planks.

The combination of cork and Sophia insulation protects the liquid hydrogen and liquid oxygen tanks from ambient heat, preventing excessive boiloff while the rocket remains on the launch pad.

The entire Delta IV Heavy rocket is assembled in Decatur, Alabama, with structures built locally using isogrid construction techniques featuring thin materials with ribs for stiffness and strength.

• Engines are provided by partner Aerojet Rocketdyne located in California • Upper stage components come from partner Rouen, a company based in Switzerland that has recently moved operations into the ULA factory • The payload fairing was designed and assembled by NASA's Johns Hopkins University Applied Physics Lab

• Isogrid structures are thin but stiffened with ribs for strength • All components are welded and assembled with weight minimization as a primary design principle • Sophia insulation is sprayed onto all structures

Rouen's relocation to the United States represents a strategic move to bring manufacturing capabilities within the country, exemplifying a partnership model that strengthens domestic aerospace production.

• The MST weighs 10 million pounds and moves approximately 300 feet during rollback • Movement occurs at approximately one-third mile per hour, taking about 45 minutes to complete the journey • The tower moves slowly but accelerates slightly during the operation

The flame from engine ignition is diverted through a flame bucket that turns the exhaust away from launch structures, directing it to the side where no plumbing or critical infrastructure exists.

• Ignition begins with thrust measurement and strain monitoring • The rocket is placed under thrust vector control to maintain proper orientation once engines achieve thrust • All three cores cannot be ignited simultaneously; they are staggered for faster propellant consumption and flame management

The outer left core ignites first, with flames rolling across and igniting the remaining cores like a gas burner on a grill, preventing flame suppression and ensuring rapid propellant consumption.

The three cores operate simultaneously at full power, each producing approximately 700,000 pounds of thrust for a combined total of approximately 2.2 million pounds, with identical engines and propellants.

Large horizontal struts carry loads from the side cores and transmit them to the center core, forming a rigid structural frame that allows proper dynamic steering and control of the rocket.

Thrust vector control (TVC) is more effective on the Delta IV Heavy because the side cores provide a larger moment arm from the center core, improving control authority during flight.

TVC requires active engine thrust to function, necessitating that engines ignite and maintain thrust before release from the launch pad, as TVC becomes inoperative without active thrust.

Parker Solar Probe uses a custom solid-rocket kicker stage fabricated by Northrop Grumman, providing the additional velocity and energy (C3) required for this mission beyond what the cryogenic stages can deliver.

• The solid rocket includes thrust vector control through its own actuators and nozzle • It has integrated controllers making it part of the rocket system rather than a passive component • This TVC capability allows the solid stage to be pointed properly when the cryogenic upper stage completes its burn

After approximately 40 to 45 minutes from launch, the spacecraft separates and enters its first perihelion pass near the Sun for the beginning of its seven-year mission profile.

• The accuracy required is stunning because the spacecraft must be dropped off at a specific point in space within 40 minutes of launch • No meaningful course corrections occur after injection; the trajectory must be established by the launch vehicle alone • The spacecraft's attitude control system can only orient it to face the Sun but cannot correct trajectory errors from the launch vehicle

At age nine, Tory became fascinated with rockets after watching a friend's homemade rocket launch fail, inspiring him to build his own rockets from salvaged materials.

• He removed the propellant from commercial model rocket sticks • He compiled the propellant into an old wrought iron pipe to create functional rockets • Several of his homemade rockets achieved partial flight, and he retained all ten fingers throughout the process

His first professional rocket work was with Lockheed on ballistic missiles launched from submarines, developing expertise in large-scale rocket systems.

• His wife Rebecca is also a rocket scientist • His children are fourth-generation engineers, continuing a family tradition • His father worked on Apollo for North American Aviation near Edwards Air Force Base

Dr. Eugene Parker theorized the existence of solar wind in the 1950s and proposed that the solar corona is hotter than the Sun's surface, concepts that were not widely believed at the time.

Parker Solar Probe represents a 60-year technological development effort to finally verify Dr. Parker's theories about solar wind and corona temperature, proving that his original calculations were correct.

• The mission is dedicated to Andy, the orbital mechanics specialist who designed the Venus gravity-assist trajectory that made the mission feasible • Andy passed away before seeing the mission launch, making the flight a memorial to his contributions • Honoring deceased team members and retirees through mission dedications is common practice in spacecraft programs

For the scientists and engineers who worked on the Parker Solar Probe, this represents the pinnacle of their careers after at least a dozen years of development, making the launch a profound responsibility and life's work achievement.

• Propellant feed lines run the full height of the rocket from the orange band at the top to the engines at the bottom • The fluid column can resonate and oscillate like water hammer, feeding unstable pressure to the engines • This instability can interfere with combustion and engine performance

Pogo suppression systems absorb oscillation energy from the fluid column, preventing water hammer effects similar to expansion tanks used in home plumbing systems.

• Internal tank baffles prevent propellant from sloshing away from the engine inlet during acceleration • Baffles help dampen fluid motion while maintaining weight efficiency • Computational fluid dynamics modeling predicts how fluid and vapor interact in confined tank spaces

Baffle design requires finding the optimal balance between preventing sloshing and minimizing weight, as too few baffles risk engine starvation and too many baffles add excessive mass that reduces performance.

The upper stage performs coasting phases where engines shut down for extended periods, during which propellant floats freely in zero gravity.

• The critical concern during coasting is preventing vapor bubbles from reaching the engine inlet • Bubble location directly affects engine restart capability • Improper bubble positioning can prevent reliable restart of upper stage engines

Before engine restart, the attitude control system applies gentle positive pressure to move propellant back toward the engine inlet, ensuring the engine inlet is covered with liquid rather than vapor.

Computational fluid dynamics specialists model the behavior of liquid propellant and vapor in confined spaces with zero-gravity conditions, predicting bubble migration and enabling proper restart sequences.

• ULA employs specialized experts in structural design, analysis, dynamics and motion control, and propellant behavior modeling • Dedicated sloshing specialists model how propellant moves inside tanks during flight, predicting cavitation risks • Teams focus deeply on individual technical disciplines to solve complex rocket engineering problems

Every aspect of rocket design involves trade-offs and compromises, requiring careful analysis to find optimal solutions that balance performance, weight, reliability, and cost.

ULA measures success not by the rocket itself but by the mission payload reaching its objective, acknowledging that the rocket is simply the vehicle for delivering the spacecraft to its destination.

Tory Bruno demonstrates deep engagement with rocket technology throughout his career, living and breathing the subject matter and understanding the intricate details of orbital mechanics, propulsion, and spacecraft operations.

The Delta IV Heavy appears larger in person than expected from distant viewing, despite the 30-story building and rocket being difficult to perceive accurately from the launch pad perspective.

The pristine rocket at the pad represents its most beautiful appearance before launch, before engine firing will char the side and create the distinctive flame pattern visible during flight.

• Hydrogen ignition creates orange charring on the rocket side as the rocket appears to catch fire • The flame pattern is partially predictable based on physics but varies slightly each launch • The rocket sets itself on fire then rises into the sky trailing a column of flame

This mission represents decades of work for many team members and embodies the pinnacle of their career achievements, making the launch a profound moment in their professional lives.