SEN 1519

Table of Contents - SEN 1519

  1. Flapping Q
  2. E3.6
  3. FFQ
  4. CIAM Meeting info

Flapping Q?

German engineers have built a true flapping wing aircraft - looks and flies
like a gull (it is radio controlled, alas). This link
ird-festo.html shows a video about development and flight (last 3rd shows
the flying, the rest is development). Sorry, German language only.
Interesting is the low power consumption: 25W for a 2m / 485g bird. Makes
those F1Q birds look hopelessly overpowered!
Klaus Salzer

Flapping E36

or is it E 3.6 ?


This issue has a wide range of articles, perhaps more so than in previous ones.
For the F1A enthusiasts, there is an excellent account by Allard van Wallene of the F1A February 2011 contests in California, where Roland Koglot showed his mastery and the possibilities of the Low Drag Airfoil concept by convincingly winning all three of them. The article includes  an interview with Koglot, Per Findahl, Victor Stamov, Javier Abad and Bart Rotteveel about   F1A design trends. F1B fans have two articles on rubber motors, the first part of a very comprehensive look at Rubber Motor Testing by Paul Rossiter (to be continued in the July 2011 issue) and  an analysis by Robert Morris on the knot formation on the motor, that leads to an estimate of the maximum turns that the motor can take.
A subject that is very seldom discussed and quite hard for the designer to decide is the effect of the position of the fin on the flight trajectory. Andrew Longhurst  reports on the findings of  tests on a specially equipped P30 model where the fin could be made to take several positions. Dave Sechrist concludes the article on his Marie Super Skinny E P30 ( presented in the January 2011issue) with a photo sequence construction article  of the model illustrating many clever solutions to the building process.
The great Satellite  AMA Gas design by Bob Hunter is remembered in an article by Sergio Montes, tracing the several versions of this beautiful design, a classic with well developed structure. Model engine enthusiasts will be fascinated by Adrian Duncan's detailed study of the Russian Marz 2.5 Diesel engine and its very curious story, a 1950's design of very good performance and still widely available today.
Laurie Barr is a very well known name for Indoor modellers in the UK and for his Open Rubber and Open Glider designs of the 1950's, 1960's an 1970's. Laurie is still active at 85 and  one of his successful designs, the Scram, was presented in FFQ#36. His  interesting autobiography will be published in three parts in FFQ, the first of which is included in this issue.
Full contents and the cover of the issue can be seen in our website :
Sergio Montes

CIAM Meeting

The the info is now online at

and this one has all the proposed rule changes.

Note also that Agenda package 1 that has reports of the various world champs has the report of the F5 WC in Muncie with a decription of some of the Energy Limiter problems that have been alluded to but never explained in the f1Q discussions.

Package 2 containd the reports of the various sub commitees , including F1. This gives the FAI view of the status of the f1 competition events.

Package 4 includes the World Cup Report.

Roger Morrell