Beyond The Sprues
Modelling => Ideas & Inspiration => Aero-space => Topic started by: finsrin on December 29, 2013, 03:08:03 PM
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Discovered this airplane today. Did not know about it and likely many of you didn't either.
http://en.wikipedia.org/wiki/Naval_Aircraft_Factory_TDN (http://en.wikipedia.org/wiki/Naval_Aircraft_Factory_TDN)
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Yeah, I've seen the one they still have one at the Naval Air Museum. Neat plane!
Cheers,
Logan
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I'd seen it, thought the "TDN" meant Target Drone... never knew it was meant for attacks. Kinda neat.
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Looked it up on Wikipedia and followed the links. Came across this:
Interstate XBDR (http://en.wikipedia.org/wiki/Interstate_XBDR)
(http://upload.wikimedia.org/wikipedia/commons/thumb/b/b1/Interstate_XBDR-1_flying.png/800px-Interstate_XBDR-1_flying.png)
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Found this thread (http://www.secretprojects.co.uk/forum/index.php/topic,10838.0.html)over at Secret Projects.
I am sure our in-house on-call Uber Engineer Evan (elmayerly ) can summarize this report for us. ;)
Reisert, Thomas. "Tests of a 1/17-Scale Model of the XBDR-1 Airplane in the NACA Gust Tunnel", NACA Report WR-L-539, 1944 (http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19930092619_1993092619.pdf)
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As usual, Wiki is WRONG.
From the diary of STAG-1, the unit that developed & used TDR-1s ...
"The first attack was conducted on 30 July 1944, on a derelict Japanese freighter, the YAMAZAKI MARU, that had grounded itself near Cape Esperance on Guadalcanal Island in the Solomons. Six TDR-1s, with four intended for the attack and two as backups, were committed to the attack, all armed with 2,000 lb bombs. Two crashed on takeoff, two performed attacks that were frustrated by dud bombs, but two went off with very impressive bangs. It made for great film footage, but by that time the program's standing was so low that they had to lobby very hard just to keep the program from being cancelled.
From 27 September 1944, STAG-1 conducted a series of attacks on Japanese installations on the island of Bougainville. When the attacks ended on 26 October 1944, STAG-1 had expended 46 TDR-1s in combat, with 37 performing attacks and at least 21 hitting their targets. The Japanese found the attacks startling, believing that the Americans had taken up suicide attacks."
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Are you sure that first one didn't come out of an IKEA catalogue? ;)
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Found this thread ([url]http://www.secretprojects.co.uk/forum/index.php/topic,10838.0.html[/url])over at Secret Projects.
I am sure our in-house on-call Uber Engineer Evan (elmayerly ) can summarize this report for us. ;)
Reisert, Thomas. "Tests of a 1/17-Scale Model of the XBDR-1 Airplane in the NACA Gust Tunnel", NACA Report WR-L-539, 1944 ([url]http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19930092619_1993092619.pdf[/url])
Well, if I'm understanding it correctly (and it's been a while since I've worked much on the analytical side of things), it's saying that the aircraft's sensitivity to gusts is exceedingly depending on cg position and that you really, really don't want to move the cg farther aft than 20% of the wing chord at the centerline of the aircraft since that makes it much more sensitive to gusts and puts it much closer to instability.
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As usual, Wiki is WRONG.
From the diary of STAG-1, the unit that developed & used TDR-1s ...
"The first attack was conducted on 30 July 1944, on a derelict Japanese freighter, the YAMAZAKI MARU, that had grounded itself near Cape Esperance on Guadalcanal Island in the Solomons. Six TDR-1s, with four intended for the attack and two as backups, were committed to the attack, all armed with 2,000 lb bombs. Two crashed on takeoff, two performed attacks that were frustrated by dud bombs, but two went off with very impressive bangs. It made for great film footage, but by that time the program's standing was so low that they had to lobby very hard just to keep the program from being cancelled.
From 27 September 1944, STAG-1 conducted a series of attacks on Japanese installations on the island of Bougainville. When the attacks ended on 26 October 1944, STAG-1 had expended 46 TDR-1s in combat, with 37 performing attacks and at least 21 hitting their targets. The Japanese found the attacks startling, believing that the Americans had taken up suicide attacks."
Mmm, no. The Wiki entry on the TDN is correct, you are quoting the operational use of the TDR.
Two different machines. The Wiki entry on the TDR mentions the operations.
http://en.wikipedia.org/wiki/Interstate_TDR (http://en.wikipedia.org/wiki/Interstate_TDR)
BTW Molt Taylor of Aerocar fame worked on the Navy drone programs.