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  • November 27, 2010 at 1:28 pm in reply to: DC-3 Barrel rolling #1133603
    fanavion
    Participant

    “Gs” Made Visible

    Or rather: “Floating” Ball

    http://www.youtube.com/watch?v=9sOOYznz-tw
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    November 26, 2010 at 5:16 pm in reply to: DC-3 Barrel rolling #1134247
    fanavion
    Participant

    I cannot defend Alex Henshaw’s phraseology – it was an imprecise figure of speech.

    Imprecise as the phrase from From Gull to Camel quoted already some posts up:

    So I put my glove on the top of the Instrument panel coving and as I pulled up we started to get into negative ‘G’.

    Obviously it should read: So I put my glove on the top of the Instrument panel coving and as I pulled up we started to release the pressure on the yoke , or the like.

    Especially in the light of what Henshaw says in the end of his passage about rolling the Lancaster in “Sigh of a Merlin”:
    In combat use, a pilot taking evasive action would be expected to put far greater loads on his machine than I did in a roll that produced no negative ‘G’ and no more than 1 ‘G’.

    BTW: How long will a glove or a person “float” in an inverted aircraft until gravity pulls them down, relative to the aircraft and relative to the earth. What happens in the vertical bank positions of the aircraft ?
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    November 26, 2010 at 11:55 am in reply to: DC-3 Barrel rolling #1134440
    fanavion
    Participant

    Some questions:

    What is the physical effect which mades this glove to be suspended in the air ?

    With reference to the outside world or the aircaft ?

    How long was it suspended in the air, as the machine seemed to roll around it ?

    360 deg ? Or just in part of the rolling arc , which means the glove was lying on the ledge when the roll started, rose when the elevator control was eased or pushed down, and setteled again on the ledge after 360 degs were completed.
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    November 25, 2010 at 8:45 pm in reply to: DC-3 Barrel rolling #1135036
    fanavion
    Participant

    Another vertical bank photo of the DC-3 in La Camina at the MD80.IT Forum

    http://i566.photobucket.com/albums/ss104/atalanta89/La%20Comina%20Airshow/IMG_6156.jpg

    That could well be the top of a wing over.

    November 25, 2010 at 5:27 pm in reply to: DC-3 Barrel rolling #1135462
    fanavion
    Participant

    I do know a Propliner staff member and he verified yesterday that the picture in question is authentic….. and I have an Internet contact with the present owner as we have exchanged pictures of her history. …… I have received no contact from the group to verify the photo, it’s been two weeks.

    I would actually like to speak to the PIC to discuss the procedure. Between my immediate family we have over 8000 hours in the DC-3 and we are still actively involved with two DC-3’s. I would personally like to know more about it.

    Thanks for that information. I hope you will succeed to get more.

    Will it be able to contact the photographer Ugo Vicenzi via the Propliner staff member ?

    November 25, 2010 at 3:10 pm in reply to: DC-3 Barrel rolling #1135652
    fanavion
    Participant

    That coresponds to my …starbord aileron which COULD be slightly UP in the Propliner picture. But we should be cautious interpreting too much from pictures in that quality.

    Be that as it may, I just contacted the photographer from the link T-21 gave us in his starting post and the organizers of the La Comina Airshow asking for more information about the DC-3 display.

    In the other two links I presently do not find a link for an e-mail contact.

    Does anyone know who presently owns DC-3 N49AG ?
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    November 25, 2010 at 10:18 am in reply to: DC-3 Barrel rolling #1136008
    fanavion
    Participant

    N49AG c/n 11737 was reported to have barrel rolled at the La Comina Airshow Italy on 26 June 2010. …

    DC-3 N49AG is pictured upside down in Propliner No .123 on page 5. The caption says “.. midway through a surprise barrel-roll in front of the crowd at the La Comina Airshow... “. Background is just a uniform light tone, no clouds or ground scenery visible. The DC-3 is on the back, the port wing is about 15 deg down in the forground .

    There is no perceptible deflection of any control surfaces, except the starbord aileron which COULD be slightly UP.

    What does not mean for me it is actually a barrel roll, see the related discussions in this thread. May I introduce an new aspect here : The DC-3 could as well be captured here in the peak of a steep wing over.

    The photographer is Ugo Vicenzi. I searched with this name in the web but still did not find anything related. It is indeed surprising not to find any pictures or videos in the net showing the DC-3 rolling.

    Nearest comes this picture in Picasa Webalbum showing the DC-3 in 90 deg bank (again no deflection of control surfaces perceptible here)

    http://lh6.ggpht.com/_Ttr9E-TjJEU/TCppbFhLHYI/AAAAAAAAFQI/REO-bKe5ovk/s720/IMG_1930.JPG

    and from 31st Aviano Tail Spotters Group

    http://www.31atsg.it/euro-airshow/Comina2010/DC-3_N49AG_7.jpg
    (45 deg bank alerons deflected)

    have a look , too, at

    http://www.31atsg.it/euro-airshow/Comina2010/DC-3_N49AG.jpg
    (45 deg bank front view, surfaces not clearly visible)

    Carl

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