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  1. cblink.007

    The Great OpenVSP Discussion Thread

    So folks, while I have seen this application mentioned many times here within the forum, I am kind of surprised to find no dedicated forum to it. The NASA folks who have developed OpenVSP have openly stated "takes minutes to learn, but a lifetime to master", like it was some kind of tactical...
  2. epijack

    A Detailed Look at PSRU Design Methodology

    Over the course of recent years, and over the course of having designed several engines and gearboxes for various applications (PSRU, helicopter, NASCAR, INDYCAR, industrial, etc) , several clients and a number of friends have asked me to make available my thoughts on "How to Design a PSRU"...
  3. S

    How to find the diminishing ratio of the mouth of the fuselage and the end, for a STOL aircraft?

    How is the diminishing ratio calculated? Is there any optimal formula to it?
  4. S

    Need help finding out whether a specified dimension wings can generate enough lift

    I am designing a STOL aircraft of Length 12ft Height 5-6ft. Wingspan 15ft Wing Breadth 2.6ft Wing Area 39sqft Aspect Ratio 5.77 The wing design will be rectangular. And the aircraft is a scaled down version of the DRACO (modified Wilga 2000). Can the wings generate enough lift to carry about...
  5. airventurer

    Ultralight Motor Mount

    Help Needed! Electric ultralight motor mount This year I purchased an ultralight flexwing trike with a Geiger electric propulsion system. The owner had flown the aircraft a few times but I was skeptical of the motor and controller mount that they had designed and were flying with. It was a...
  6. cblink.007

    L-V Aeronautics Flying Wing Project Back On!!

    First, on behalf of the L-V group, I wish to sincerely apologize to the forum here. The last 10 months have been extraordinarily trying, requiring us to temporarily shelve the project while we attended to a myriad of personal matters that frankly overwhelmed the whole team! We have received...
  7. C

    Best spar construction/attachment for strength. Acrobatic wing design

    What is the best spar attachment for strength for wing load? Also should the wing be one piece, going through the fuselage with a one piece spar going from wing tip to wing tip? How are acrobatic aircraft wings/spars constructed and attached to allow such a heavy wing load?
  8. A

    Part 103 low speed ultralight glider design (wing)

    I need ideas of wing system for ultralight glider (such as Chanute, EasyRiser or Primary Instruction Glider) (may be biplane) low speed (25 - 40 hm/h) , weight of glider < 40 kg). My idea is next: biplane (wingspan - 6m, wing chord - 1.2m), S1210 airfoill...
  9. SVSUSteve

    REFERENCES BOOKS AVAILABLE TO MEMBERS

    These are the books I have available if anyone needs me to look something up in them. The ones marked with an asterisk (*) are hard copy only. Thurston: Design for Flying* Thurston: Design for Safety* (I keep joking that I need to write an updated version of this) A. J. Kundu: Aircraft Design...
  10. D

    Patenting a design

    How do you decide whether or not an airplane design should be patented?
  11. birdus

    Wing design for lightest possible wing

    If I wanted to build the lightest possible wing, how would it be constructed? For my sake, I'm thinking about a strut-braced wing, a la Luscombe 8 or Cessna 152. I'm thinking that the spars would be according to Jim Marske's designs: composite web or sandwich web, with the caps being made from...
  12. D

    Move along - nothing to see here

    Bye There is an important omission in the calculations for the "Constraint Analysis". Put there on purpose to see what would happen. All of the calculations are simple "hand, closed-form" calculations any high school algebra student should easily follow. Since no one commented on any of them, I...
  13. L

    What would be a reasonable CLmax estimate for the USA35A thick, high-lift airfoil?

    Hi, I'm trying to choose airfoils and establish wing dimensions (and high lift devices if needed) for my design. I have a low stall speed requirement (Vs0 = 42km/h [with flaps]), so I'm looking into high-lift airfoils with good stall and thick enough for a light spar. I'm trying to balance CLmax...
  14. L

    Looking for someone experienced to help me with my first "simple" airplane design

    Hi, I'm a high-school student just doing my finals next month. For a long time, I wanted to design and build airplanes, but had insufficient funds, time and workshop space. I did not waste my time though. Over the past year, I've been building model aircraft and studying aerodynamics. I've read...
  15. recmob

    Experimental Aircraft / Homebuilt Fuselage

    Designing / Building your own design? Here's a great start! 4130 Welded Airframe Side by Side Seating Airframe was originally a Merlin GT (motor mounts are set up for a Rotax 912ULS, NO engine included!) Airframe has 150 Total Time Includes: Fuselage w/ Vertical Fin & Rudder Stabilizers...
  16. L

    Greetings from an aspiring designer!

    Hello everyone! :) I have scored thousands of hours in WWII aviation combat games over a past few years and I got hooked forever... Since then I've been learning, building and flying model airplanes (crashed a lot of them) and now comes the moment of truth: can I build a real airplane? I'm on...
  17. B

    Various beginner questions

    What is the most complete book about design/theory and construction of a aircraft? Doesnt have to be gear toward a certain type of aircraft. Lots of graphics preferred. As far as aircraft aluminum for the wings, spar, frame, fuselage etc..., what type of aluminum is used? Where can this...
  18. L

    What tools do you use for design work?

    Hi everyone, I'm a new member, been lurking for a while so let me know if I'm breaking any posting rules. It looks like a lot of people on this forum are doing designs from scratch. I've been working on some homebuilt designs and I've got some questions about the processes you guys use to work...
  19. G

    Wing In Ground Effect Craft Design

    I would like to discuss the different aerodynamic designs of wig craft. Any insight or information would be greatly appreciated. To get the conversation started I am interested in a longer range craft powered by twin engines, either Chevrolet motors or aircraft motors. A craft that is similar to...
  20. T

    22 hp V Twin Predator engine ultralight Aircraft (IDEA/project) ICON A5 REPLICA

    Hey guys, new to the forum here. So I've been planning on building my own ultralight for quite some time now. And although I wouldn't mind just buying a used one, I really just want to design one myself. I would like to post my idea for what I'm doing here and see if I can get some useful...
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