Originally Posted by
The Flying STIG
Hi,
that is finally some very interesting progress and I am curious how it goes. I am at the topic for a while already, as I am consulting CubCrafters Europe in German speaking countries and what I have learnt is that it is illegal to do glider towing with an experimental airplane an also with LSA airplanes within N-registration. That is obviously one of the reasons, why nobody has done it yet, or officially reported on this.
In Europe it would be no problem. I checked with German aviation authorities "LBA" and here it is no problem at all. It Would require some stress testing on the fuselage, which means it would require some pulling at the installed towing kit with the max. towing force you want to reach. That is why nobody has done it so far. There is only one D-registered plane flying in Germany, and one in Poland. Both are "SS"-models (which might sound a bit funny in combination with a German registration, ...), so LSA with a permit to fly of LBA.
Besides the stress testing some very small programm of flight testing would be required, that would be it.
How are you planning on doing this? Assuming you are from NewZealand (right?), what are the needs for your CAA?
Did you do any stress calculation or testing? Would you share the results (as CubCrafters are not interested in doing the testing so far).
CHT is an interesting question. Also towing speeds are interesting, as Vy (63kts, about 115km/h) is quite slow for a modern glider, which would rather need a little over 70kts.
I have done a lot of glider flying and towing on PZL104 Wilga and Piper Pawnees, too. So I do have the experience, too.
Our Norwegian friends, Olaf and JP, of Aerocub Nordic, who built the first European Kitplanes LN-BER & LN-FLY do have a Tost-hook at LN-BER and did some banner - towing, which can be seen on YouTube (Olavb). But as they told they did not do stress testing before so they did not tow gliders, yet.
It would be great to get connect on the issue and learn a little more how it goes.
Good luck and fly safe!
Best regards, Peter (peter@cubcrafterseurope.com)