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Sirocco III ( 68 in. / 172.7 cm )


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Sirocco III model airplane plan

Sirocco III

Aeromodeler magazine's Sirocco III

Sirocco III is a sport free flight towline glider, designed by P. W. Grange in the 1940s. The wingspan of this high aspect-ratio glider is 68" with the two wing panels plugging into the fuselage's plywood tongue. Also worth noting, the dual vertical stabilizers are installed on the ends of the horizontal stabilizer, lending a distinctive appearance to the final product. There are some challenges for prospective builders. First, only the root rib is shown for the (slightly) tapering wing planform, so creating the remaining ribs will require balsa sheet"sandwich" techniques, made more difficult by the thin airfoil and slight under camber. Second, the fuselage has a circular cross section with a substantial number of formers (all shown) and lots of balsa stringers running the length of the fuselage; some sort of keel or jig arrangement would be useful to produce a straight fuselage. "Simplifying" the fuselage to a rectangular cross section would reduce building time/effort substantially. And lastly, the plans don't show a dethermalizer, an essential feature to prevent flyways in windy or thermally conditions.

Link to this page: http://aerofred.com/details.php?image_id=90797

Details: Full Details
ID: 90797
File Size: 1.2 MB
Type: Glider
Class: Free-Flight
Use: Thermal
Motor: Not-Powered
Wingspan: 68 in. / 172.7 cm
Publisher: Aeromodeler magazine
Designer: P. W. Grange
Date: 12/1945
Weight Class:100g-To-200g (3.5oz-To-7.0oz)
Material:Various-Wood-Types
Listing Editor: aeroastro
Added: 24/05/2015 10:14
Updated: 20/11/16 03:44:29pm
Corrections? Contact aeroastro
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Filetype: .pdfSoftware for .pdf files

Member Profile for aeroastro

Hi! I'm aeroastro

Fascinated with model aviation since a youngster, my modeling experience includes control-line, indoor modeling, competition free flight, r/c competition thermal sailplanes, r/c electric powered models, and more recently, Giant Scale r/c models. After gaining an MIT Aeronautical/Astronautical degree, I served 29 years in the USAF in the space and missile fields, serving as Program Manager for two major space programs. Presently retired and residing in Southern California, enjoying its year-around excellent

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Plan Attributes: Edit Attributes
Plan ID:90797
Keywords:Sirocco free flight sport towline glider P W Grange Aeromodeller
Class:Free-Flight
Model Type:Glider
Aircraft Use:Thermal
Wingspan: 68 in. / 172.7 cm
Wingspan Class:160cm-To-200cm (63in-To-79in)
Wing Position:Mid-Mounted-Wing
Wing Style:Straight-Wing-Trap
Wing Dihedral:Dihedral
Landing Gear:Skid
Motor Type:Not-Powered
Weight Class:100g-To-200g (3.5oz-To-7.0oz)
Material:Various-Wood-Types
Construction Skills:Low-Intermediate
Pilot Skills:Novice
Publisher:Aeromodeler magazine
Date:12/1945
Designer:P. W. Grange
Restorer:aeromeddeler
Category:Wood Model Airplane Plans
Similar:Plans like Sirocco III

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