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  1. karoliina.t.salminen

    Weight estimations based on modern composite airframes?

    Typical weight estimation data is pretty old today, like the one in Raymer's book. I think it would be useful to have statistics of modern aircraft airframe weight statistics split by at least major component, or in minimum the total empty weight of the airframe minus engine and minus propeller...
  2. karoliina.t.salminen

    Practical aircraft for everyday use -concept

    I have been talking about long range concepts before but there is another category where there is a hole on airplane market, such plane does not exist today (that would be available): - Practical everyday commuter that is geared towards the fact that airports are closing and also airports are...
  3. karoliina.t.salminen

    A method to produce homebuilt aircraft by using existing components differently

    We once had a discussion couple of years ago with couple of aircraft builders at SIL Talvipäivät (equivalent of EAA Finland, and a yearly gathering of experimental builders and enthusiasts, much smaller scale than EAA though) about my specifications for the personal HALE-cruiser/personal...
  4. karoliina.t.salminen

    Rules of thumb in structural design?

    I have been concentrating on aerodynamics for years and have avoided the structural design part quite completely. However now I would like to get started on it too. Before going to complicated stuff I would like to understand the relations of length, mass and force (as generated by drag due...
  5. karoliina.t.salminen

    Low disc loading by incorporating large number of electric driven propellers

    I was watching a video about some EADS concept jet where the jet engines were replaced with electric ducted fans. And actually several such ducted fans instead of like two. And I was also looking some unducted fan information at the same time. And what we know is: - it is beneficial to move a...
  6. karoliina.t.salminen

    Props in pylons next to aft fuselage?

    Hi CriCri is an example of props in pylons. However, what about pylons in aft fuselage? TT62 Alekto is example of that. It is unclear why it failed, was it due to mechanical problem or aerodynamic problem? Will the pylons function as additional unwanted tails with moment arm clearly aft from CG...
  7. karoliina.t.salminen

    Aircraft conceptual design software for iPad?

    Hi Short question: - would somebody find useful a conceptual design software if it ran on iPad? Long time ago I was writing one for Mac, but then switched on doing Excel-sheets. Situation is as everybody knows, the software would have nothing else but calculate large number of formulas that you...
  8. karoliina.t.salminen

    Photos from Flynano unveiling event (Helsinki / Verkkokauppa.com)

    Hi, I made Facebook album (that is public to everyone) about the Flynano (the sub-70 kg ultralight airplane) unveiling event. Flynano verkkokauppa.com | Facebook If you are interested to take a look on Flynano proto, check it out. Best Regards, Karoliina
  9. karoliina.t.salminen

    Wing molds out of blue styrofoam?

    I have been experimenting with mold fabrication with CNC. The most inexpensive material for the block to be carved happens to be the blue styrofoam. However its melting properties causes a surface finishing problem. I have figured out that I can directly paint over the foam using solvent free...
  10. karoliina.t.salminen

    Saucer shaped vtol coanda effect multicopter

    I have been thinking about vtol concepts out of the box since they would have their place in aviation, a gap currently unfilled. If we forget issues of combustion engines and consider an electric vtol. With today's batteries outcome will not be that useful, batteries are too heavy, but there...
  11. karoliina.t.salminen

    Ducted fan efficiency if engine is taken out of the equation (pure electric case)

    Hi, There has been some back and forth discussion about ducted fans in general in this forum and elsewhere. Usually the limitations come from the engine that turns the fan. In general it has been concluded that the efficiency of a ducted fan is lower than a prop, except I have seen Orion...
  12. karoliina.t.salminen

    RC Model Plane Instrumentation?

    About instrumentation of a RC model if you want to build one to obtain some test data without access to a wind tunnel: You should be able to add instrumentation to RC model and use for example embedded hardware called Arduino to deal with the data. The cost of these parts is very small compared...
  13. karoliina.t.salminen

    High aspect ratio design for long range, optimized for cruise efficiency

    So I thought that Jay's thread gets hijacked if this thing is continued to be discussed there, so I opened a new thread. So consider this (if the initial requirements were) and we leave out all hybrid propulsions from this speculation at this time: - Typical cruise altitude 25000 ft. Service...
  14. karoliina.t.salminen

    Video: Burt Rutan and His Airplanes

    Rutan tribute day in Oshkosh 2011. This video is about Burt Rutan and his aircraft designs. Burt tells about how he wanted to do space flight from Oshkosh. Starship and Boomerang flying on the video. Mike Melvil flying Boomerang and Bob Scherer flying the Starship. Link to the video: Burt Rutan...
  15. karoliina.t.salminen

    Video: Synergy Aircraft Presentation, Airventure 2011

    Link to the video here: Synergy aircraft presentation, Oshkosh 2011 - YouTube
  16. karoliina.t.salminen

    Video: Burt Rutan Bipod Update. Oshkosh Airventure 2011

    Link to the video I recorded: Burt Rutan Bipod update, Oshkosh 2011 - YouTube The Bipod is a roadable airplane or flying car, whichever way you want to put it. It uses hybrid electric-gasoline -propulsion. Unfortunately I had to shoot it from the side. I setted up my camera in the middle at...
  17. karoliina.t.salminen

    Composite spar design & composite wing design?

    Hello, I am thinking of a concept which is targeting at both high AR and very good empty to gross weight ratio at the same time. The weight of the resulting wing will pretty much dictate the feasibility of the concept. I want to calculate the weight based on actual materials that are going to...
  18. karoliina.t.salminen

    John Roncz: Inside story about Rutan designs. Airventure 2011, Oshkosh

    Video John Roncz: Inside story about Rutan designs. Airventure 2011, Oshkosh :http://youtu.be/E9eEwyVrAps?hd=1 Link: John Roncz: Inside story about Rutan designs. Airventure 2011, Oshkosh. - YouTube Some people here were wishing for this video, and here it is. Enjoy!
  19. karoliina.t.salminen

    Video: John Roncz's presentation 1 at Oshkosh 2011

    http://youtu.be/nMuHh44upfA?hd=1 Link: John Roncz Presentation Airventure 2011 - YouTube
  20. karoliina.t.salminen

    Video: Dr. Pete Gall's 'Designing light aircraft' presentation, Airventure 2011

    I recorded the presentation: http://youtu.be/xNUGKCBtTIA?hd=1 Link: http://youtu.be/xNUGKCBtTIA?hd=1
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