GAP

Gimbaled Airframe Poseidon

Pathfinder 2/2
in use: testing

Specifications

Height
2.2 m
2.2 m
Diameter
80 mm
80 mm
Dry Mass
1501 g
1501 g
Propellant
Water, 4.5 kg
Water, 4.5 kg
Pressurant
Air, 3 MPa, 4 l
Air, 3 MPa, 4 l
max. Thrust
102 N / 10.4 kgf
102 N / 10.4 kgf
tot. Impulse
203 Ns
203 Ns
Apogee
no lift off
no lift off
Poseidon-GAP1-Short_Moment

Making Carbon Composite Tanks!

Both Tanks we build so far are made out of carbon and glass fibre composite with an epoxy matrix. The tanks consist of an inner composite liner, two composite bulkheads with a threaded aluminium adapter embedded, and a composite sleeve over the whole thing.We used a 6K 70mm carbon fibre sleeve and an 80g/m2 plain weave glass fibre fabric, combined with Resoltech 1050/1056S epoxy resin as the matrix. Tank Alpha Alpha's liner is made out of the carbon fibre sleeve, hand laminated over a 80mm diameter tube as mandril. We used some backing paper over the tube to prevent the ...

Avionics Schematics and Layout

Moving from FAR to GAP, we're building a whole (almost flight worthy) rocket. This includes the corresponding Avionics, which we will look at in more detail here. This first version of the avionics PCB should function as a trial and guide for subsequent flight-ready boards. Accordingly, it should have equivalent or at least similar components and layout. Requirements The Avionics has to meet certain requirements, for all the stuff it needs to do: Connected to launch control computer (10's of meters away). For GAP, which is not supposed to lift off, a telemetry connection is viable as cable or via ...

Machining fittings for Poseidon!

We machined the fittings for the poseidon water rocket in the student workshop of our university. After turning the two fittings in a lathe, boring the axial holes and cutting the axial theads, we milled the sides and drilled the radial holes. The left fitting connects the main valve (inner thread, G1/4) to the water tank (outer thread, G1/4) and depress valve (radial hole, G1/8). The right fitting connects the quick disconnect adapter (radial hole, G1/8) to the air tank (outer thread, G1/4), and has thread (M8) for the parachute eyebolt. Technical Drawings Down below are the technical drawings for ...

Machining parts for test tanks

Before we build the flight-ready tanks for the Poseidon Rocket, we're going to manufacture test tanks to see how they're going to perform and hold up to the expected pressures.You can find the concept and design of these tanks in a previous article: Poseidon Tanks: Concept and Design. As discussed previously, the tanks must have a way to connect to valves and fittings. For this purpose we're embedding a machined aluminum adapter into the ends of the tank.So before laminating the tanks, we have to manufacture these adapters. Design This adapter has to transfer the loads of working pressure to ...