A complete redesign of ObliX! [http://danielwibbing.wix.com/oblix]
Since I posted the first design for our airship, many experts have contacted me, explaining to me why a lenticular shaped airship would not have very desirable flight characteristics. Their main concerns were:
- Lenticular airships are not stable concerning their pitch angle and straight flight (Munk Moment). Consequently the airship will easily pitch up and down.
- An oblate spheroid does not have a defined break-off point for the air stream. Instead the break-off point changes position frequently causing a Kármán vortex street, trying to throw the airship off course.
- Lenticular airships have a big coefficient of drag.
I especially want to say thank you to Johannes Eißing, Andreas Burkart, Peter Hanickel and Jodoc Elmiger for their valuable advice. Based on their feedback and calculation tools, we started again from scratch. After numerous air-flow simulations, this is the first rough design for the new version "ObliX_neo" we ended up with. The CAD model on ObliX’s homepage will be given a lot more details soon.
We would be very happy to get your advice, questions or any other comments to be able to improve this new design.
Maybe you would even like to join our team? Then feel free to contact me e.g. here.
P.S. Have a look at our outdoor test flight with the silent_runner.