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  1. Yes, but you’ll have to be more specific with a...

    Yes, but you’ll have to be more specific with a question.

    In general
    1. Good static thrust (duct drag < duct thrust)
    2. Bad for high speed (duct drag > duct thrust)
    3. Design goals of ducted...
  2. Thread: Corben Jr Ace

    by Ron Blum
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    Beautiful, congratulations and job well done! ...

    Beautiful, congratulations and job well done!

    Paul would be happy and give you a big thumbs up 👍.
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    I can't image anything but pure magnesium, but...

    I can't image anything but pure magnesium, but weight is probably not a consideration. They also mentioned that they could somewhat control the aromatic content … but lower didn't seem to be part of...
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    Since we’re proving that we cannot make 100/100LL...

    Since we’re proving that we cannot make 100/100LL without the use of TEL, Is there another potential solution?

    So ... at Sun-N-Fun ... one of the major petroleum companies said that they are...
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    Busy Little Shop: This is a great post!!! ......

    Busy Little Shop: This is a great post!!! ... especially for your second post. I learned a lot. Thanks!

    Ron "always learning" Blum
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    I agree with all the previous comments, but will...

    I agree with all the previous comments, but will also add a couple more … one for each fuel to be fair :)

    1. With autofuel (everyone has mentioned no alcohol), there are two mixes: summer and...
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    I learned at Sun-N-Fun that our friends to the...

    I learned at Sun-N-Fun that our friends to the north (TCCA - Canada) have an "owner maintenance" category for previously certificated airplanes that are more than 30 years old with no manufacturer...
  8. Now that all the negative people have talked you...

    Now that all the negative people have talked you out of a good airplane, I’ll list a few positive notes. If the tail is still wood, think twice ... per the AD it has to be load tested annually. If...
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    You will find that fiberglass is very heavy. A...

    You will find that fiberglass is very heavy. A structure covered in cloth will be much lighter.

    EVERYTHING in design is a trade off. Your wingspan question is a good example. A longer wingspan...
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    I’d be glad to help with whatever you need. The...

    I’d be glad to help with whatever you need. The soaring industry needs more people like you.

    Check out Barnaby Wainfan’s current design series in Kitplanes. He’s a great guy.

    Start with your...
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    Unless one is flying an airplane with neutral or...

    Unless one is flying an airplane with neutral or negative lateral stability, there will be a little down aileron on the up wing (and up aileron on the down wing). This may be masked by aileron...
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    :thumbsup: That’s cool! I learned something new.

    :thumbsup: That’s cool! I learned something new.
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    Wing bending is good, and it is often designed...

    Wing bending is good, and it is often designed into wing structures. The reason that wing bending is good is that it gives a smoother, more comfortable ride to the cabin/fuselage/passengers.

    It...
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    It’s funny you mention that. Gust loading...

    It’s funny you mention that. Gust loading (loading due to vertical velocity of the air) is actually calculated, too. The bigger (faster and higher wing loading) airplane, the less it effects them. ...
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    Minimum required G load for part 25 airplanes...

    Minimum required G load for part 25 airplanes (transport category) is 2.5G. So, 2.5 X 1.53 would be 3.83G (my guess). Maximum G is not required to be >3.8G. So, 3.8 X 1.53 = 5.81 (highly...
  16. Nice video. Great message! Thanks for sharing.

    Nice video. Great message! Thanks for sharing.
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    :thumbsup: Enjoy the ride :) Logging time is...

    :thumbsup: Enjoy the ride :)

    Logging time is great, but be careful on the cost item. Depending on the distances you want to fly and the winds in those area, it is sometimes less expensive to fly...
  18. Thread: Corben Jr Ace

    by Ron Blum
    Replies
    14
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    2,242

    I did the drawings for the original plans for the...

    I did the drawings for the original plans for the Pober Junior and Super Aces. Paul Poberezny bought the rights to the Corbin airplanes. We widened the fuselage on the Super (single place) by 7"...
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    You have to define what you want more...

    You have to define what you want more definitively. There are generically 3 categories of what you have referred to as "motorgliders"
    1) A motorglider to perform both cross country flight...
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    There is a really good book by Hubert C. ("Skip")...

    There is a really good book by Hubert C. ("Skip") Smith entitled, "Illustrated Guide to Aerodynamics". I highly recommend it … lots of little yarn tufts so one can easily see what is going on. ...
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    Bob: I tried to answer your question in paragraph...

    Bob: I tried to answer your question in paragraph 3 of my reply #36. In a turn there has to be some (although slight) down aileron on the up wing side (and/or up aileron on the down wing side),...
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    Awesome. Thanks! I’ve heard about it the lack...

    Awesome. Thanks!

    I’ve heard about it the lack of directional stability in WWI airplanes. Dick Curtis has a Fokker DR-1 here in Wichita, and he says that it’s happy flying sideways. This might...
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    Frank, are you part of the KC Dawn Patrol? If...

    Frank, are you part of the KC Dawn Patrol? If so, when do y’all normally get together to fly? I’ll find time to come up and see the antics. Thanks, (just an average) Ron
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    I hear that there is a great Oshkosh forum...

    I hear that there is a great Oshkosh forum presentation on Thursday, 2:30PM, Forum stage 6. It is an open forum; come voice your opinion (respectfully).

    Yes, the aircraft will "typically" roll...
  25. Thread: AOA

    by Ron Blum
    Replies
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    1,307

    There's a good Oshkosh forum on this topic on...

    There's a good Oshkosh forum on this topic on Tuesday, 8:30AM, Forum stage 2. Please grill the presenter. :rollseyes:

    Ron "still not quite Wright" Blum
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