B-57b - Page 2 - RC Groups
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Dec 17, 2012, 12:21 AM
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Capt G's Avatar
aft view
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Dec 17, 2012, 10:42 PM
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Capt G's Avatar
more planking - more sanding
Dec 19, 2012, 05:41 AM
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great!
and fast!

one question...how will be the inlet an outle fans ducts and fan suport?
i dont see reinforcments in that areas...just 2 spars crossing the outlet section...
i agree with fans location forward...to get the CG easily, and speed control after but inside the ducts.
Really nice! estimated weight? and lenght?
Merry Xmas!
Dec 19, 2012, 10:04 AM
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Capt G's Avatar
Juan - you are right about the Fan position for the CG, Post # 8 shows the fan actually screwed to the poplar rails but this point the pod structures are just roughed in. More structure to follow. ESCs actually go in the fuse in a compartment with the batteries behind the cockpit area on 15" cable extensions. Span is 84" and length is about the same. Est weight is aprox 18 - 19 lbs. CG computed out at 11" behind the wing leading edge measured at the fuse. Wing loading aprox 49oz.
Dec 19, 2012, 02:00 PM
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turbonut's Avatar
11 in behind the leading edge?? how big is this thing..yikes..what is the wing cord? that would need to be at least 28 in cord ..what fans are you running?
Dec 19, 2012, 03:12 PM
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Capt G's Avatar
See post above for size. Fans are HET 9305 -700 (90mm) with HET 700-60 (2000 kv) motors using 6s batteries and Castle Ice 100s for ESCs. CG is set conservatively to give about a 10% static margain - slightly nose heavy for initial flights.
Dec 19, 2012, 08:13 PM
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turbonut's Avatar
What is the wing cord? front to back
Dec 19, 2012, 08:44 PM
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Capt G's Avatar
My mistake on the previous CG number - should be 8.66" from LE. Actual wing chord at LE is 23.5". Thanks for making me double ck my calcs.
Dec 19, 2012, 09:17 PM
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turbonut's Avatar
Yea you had me going..Ha ha ..I was thinking it dont look that big in the pics...still 23.5 in cord is a huge wing...very cool
Dec 20, 2012, 06:27 AM
No Guts No Glory
kestrel2003's Avatar

nice and clean


Very nice build, nice to see such a cleanly built balsa structure. Looking forwared to see it fly. rgds mv
Feb 07, 2013, 06:34 PM
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Capt G's Avatar
a little more progress-please pardon the Bondo
Last edited by Capt G; Feb 07, 2013 at 06:36 PM. Reason: add
Feb 07, 2013, 06:53 PM
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Larry Dudeck's Avatar
What is the source of the canopy?
Feb 07, 2013, 09:43 PM
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turbonut's Avatar
Wow..I could tell its big but your hand gives it some scale...its huge!..the plane that is
Feb 08, 2013, 01:14 AM
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Capt G's Avatar
The canopy is from the RC Lander 64" T-33 ARF.
Feb 08, 2013, 04:31 AM
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meerkat13's Avatar
Wow… beautiful build!


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