wrote on 11/25/2017 5:53 PM:
My memory is a little hazy but I recall seeing Rudy Alleman's 301 Libelle at the 1981 15M nats in Minden with glassed on external longerons. I could have my facts wrong but apparently the tail boom had been broken a few times and he decided he didn't want to go thru that again.

I've flown with Rudy since 1975, and there were no external longerons - ever!
Possibly, there were some applied after an accident to hold things in place in the
trailer until it could be taken to a repair place, but not for flying.

--
Eric Greenwell - Washington State, USA (change ".netto" to ".us" to email me)
- "A Guide to Self-Launching Sailplane Operation"
https://sites.google.com/site/motorg...ad-the-guide-1
- "Transponders in Sailplanes - Dec 2014a" also ADS-B, PCAS, Flarm

http://soaringsafety.org/prevention/...anes-2014A.pdf