ERPS: POGO Mk 0

The Bay Area's Non-profit Liquid Fuel Rocket Engine Design and Test Team

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The POGO Mk 0 is an engineering mockup of the POGO guidance and flight controls test vehicle being developed by ERPS. While not intended to actually fly, the Mk 0 has been extremely useful for determining component positioning, plumbing, engine placements, vehicle weights and overall vehicle configuration.

The vehicle has two main sections, an Upper Section (containing the RCS, Pressuant and Vehicle Apex systems) and a Lower Section (containing the Propellant Tank, plumbing, Base Plate and Landing Legs). The Upper slips over the Lower and is bolted in place to form the full vehicle.

Below are a number of photos of the Mk 0 and brief descriptions of what you're looking at. Certain parts have been removed to protect proprietary technology (such as the engines and RCS systems). Sorry. 8-)

Image Comment Photo By

Propellent Tank
Lower section, showing the propellant tank support frame. vehicle frame, legs and plumbing spacer. mjw

Base Plate
Lower section showing the base plate, the legs, the vehicle sframe and the propellant tank support frame, with tank. mjw

Attach Points
Closer view of the base plate attachments to the propellent tand support frame, including the plumbing spacer (cardboard tube). mjw

Upper Section
The upper section, including vehicle frame, pressuraant tank, pressurant support frame and RCS platform with RCS engines and valves removed. mjw

Pressurant Tank
Closer view of the Pressurant Tank and it's support frame. The RCS Platform is the flat plate on top of the tank. mjw

Attach Points
A closer look at the Upper/Lower section attach points, The angled vehicle frame legs slide over, and are then bolted to, the Lower Section Vehicle Frame. mjw

RCS Bay
Closer look at the RCS bay and vehicle frame apex, with the RCS equipment removed. mjw

Lower Attach Point
Close look at the Lower Section Vehicle Frame attach points, and the top part of the Propellant Tank. The Upper Section slides onto the Lower and is bolted in place. mjw

Base Plate/Tank Support
Closer look at the interface between the base plate and the propellant tank support frame. The outer engine attach circles are visible, as are the mid circles under the tank. mjw

Vehicle Frame/Tank Support
A closer look at the top of the Lower Section, showing the interface between the frame, the tank support and the tank. The Upper Section Bolt Holes are also visible. mjw

Engine Attach Circles
A closer look at the base place showing the engine attachment circles. Near the plumbing spacer are the Inner Engine Attach Circles, then the Miid Attach Circles, the Propellant Tank Support Frame and then the Outer Engine Attach Circles. mjw

Engine Circles
A slightly rotated view to more clearly see the three sets of 4 Attach Circles. mjw

Vehicle Legs
A closer view of the Vehicle Frame and Landing Legs, showing them extending down from the Vehicle Frame. mjw

Lower Section
All up shot of the Lower Section mjw

Perspective
L perspective shot of the Lower section showing the frame, legs, base plate, engine circles, plumbing spacer, propellant tank and it's support frame. mjw