pierre sarault
2013-02-25, 10:23 PM
On 2012-10-24 I reported that I was attempting to complete the repairs and modifications to the ill-fated Andy Lennon-design "Snowy Owl" (I also refer to it as White Owl and the designer at times referred to it as "Harrier" on some of the original drawings - thanks Brian). I had already pieced together the wing and by exploring (exploratory opening) I discovered that the binding of a flap was due to a return spring added to the bellcrank on only one of the two flaps...still a mystery as to why this was done...maybe prevent flutter (?).
Now all I have to do to the wing is design and build a new dual servo tray in the midsection that will also serve as reinforcement to the spars.
The fuselage was badly mangled just ahead of the CG (behind the wing LE) and had to be amputated...and redesigned with a bit more strength and space for the equipment.
I decided to turn it into a radial-engined taildragger by reusing the same LG and several "surplus" components like the engine, electronics, new fuel tank...etc. etc.. The new forward fuselage of lite-ply is sandwiched on top of the existing fuselage center section and forms the structure to support a new radial cowl support / firewall with shims to position the OS 40 SF with 2 deg. right and 1 deg. down (thrust angles). The dimensions, moments and design CG have been adhered-to according to the original design by Andy Lennon.
The new forward fuselage also has a reinforced "floor" to support the repositioned LG (from trike to taildragger). I plan to make the cockpit like that of a DH Beaver just aft of the radial cowl...this is starting to sound real interesting = a T tail taildragger with a radial cowl and NACA droop wings with HUGE flaps!
Now all I have to do to the wing is design and build a new dual servo tray in the midsection that will also serve as reinforcement to the spars.
The fuselage was badly mangled just ahead of the CG (behind the wing LE) and had to be amputated...and redesigned with a bit more strength and space for the equipment.
I decided to turn it into a radial-engined taildragger by reusing the same LG and several "surplus" components like the engine, electronics, new fuel tank...etc. etc.. The new forward fuselage of lite-ply is sandwiched on top of the existing fuselage center section and forms the structure to support a new radial cowl support / firewall with shims to position the OS 40 SF with 2 deg. right and 1 deg. down (thrust angles). The dimensions, moments and design CG have been adhered-to according to the original design by Andy Lennon.
The new forward fuselage also has a reinforced "floor" to support the repositioned LG (from trike to taildragger). I plan to make the cockpit like that of a DH Beaver just aft of the radial cowl...this is starting to sound real interesting = a T tail taildragger with a radial cowl and NACA droop wings with HUGE flaps!