Spinning Test in Kista (Stockholm)

Hej!

In these days experts from DLR and SSC are performing the Spinning Test on both REXUS 13 and 14.

We visited them in Kista and these are some pictures we took.

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Ejection System almost ready

Hej, last week we received the lower cross of the ejection system. Now the ejection system is almost complete! Once we will receive the rocket cylinder we will start doing some ejection tests.

Enjoy these pics!

Good news for the Upper Hemisphere

Hej!!

I have good news! Two weeks ago I told you that we were looking for some new reinforcement for the Upper Hemisphere (Link). Today we finally assembled the first of those reinforcements to one of the FFU and we tested the deployment system of the parachute. So far it is working very well and we are really happy about this!

Here you can find some CAD model of the reinforcement and some pictures that we took today while we were gluing the reinforcement and a metal ring to the Hemispheres.v

Resin Infusion process for the Hemispheres

Hej! In the next few days the mechanical team will receive the moulds for the manufacturing of the hemispheres of the FFUs (Free Falling Units).

The process used will be the Resin Infusion. In the following video you can see how does the process work.

As mentioned in previous posts the fabric used will be glass fibers. For what concern the kind of fabrics we decided to go for a very thin 8h satin. This kind of fabric has a very good drapability so it will be easier for us to obtain the right shape.

There are still some uncertainties on which type of fiber glass we will use.

The D-type would be the best since it has the lowest dielectric constant (good for radio transparencies) but unfortunately it is not very common and it will be hard to get it.

Right now we are investigating the possibility to use S2-type or E-type. Those types have a higher dielectric constant but also higher strength. In this way we might need a less thick hemisphere (0.6-0.7 mm instead of 1 mm), so the effect of the higher dielectric constant can be reduced.

See you!

Tito