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Gemini GT-40 build - 1/22/2013 3:36 AM   
jim19


 

Posts: 58
Score: 100
Joined: 3/4/2004
Last Login: 6/13/2013
From: Alamogordo, NM, USA
Status: offline 		I am in the process of building a Gemini GT-40 and decided to post a thread on the construction of this model. The one being built will be powered by 2 OS .45 engines and will be using SpringAir retracts. First pic shows the layout of the basic fuselage components with doublers glued to the fuselage sides and bulkheads. Pic 2 shows the fuselage assembly beginning with the main bulkheads epoxied in and the wing mounts installed (fuselage has been taken off jig for theses pics). Pic 3 shows the remaining bulkheads, stabilizer saddle and nosegear mount installed. Pic 4 shows the fuselage top sheet installed. Pic 5 shows the elevator and rudder pushrod outer tubes installed. Pic 6 shows the aft fuselage bottom sheeting, forward fuselage sheeting and nose block installed.

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RE: Gemini GT-40 build - 1/23/2013 12:04 AM   
jim19


 

Posts: 58
Score: 100
Joined: 3/4/2004
Last Login: 6/13/2013
From: Alamogordo, NM, USA
Status: offline 		Pic 1 shows the basic wing components. doublers are glued to the nacelles and wing ribs as required. Pic 2 shows the wing structurally built and taken off the jig. This wing is built in three sections. Center section is ready to align to the fuselage. Pic 3 shows the flag jigs in place with the airframe side flap hinges epoxied in place. Pic 4 shows the main gear mount installed and the cutouts for the wheel well. Pic 5 shows the inner sheeting installed for shaping the wheel well. Rib is also cutout for serrvo installation and lower cap strips installed.

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RE: Gemini GT-40 build - 1/23/2013 12:08 AM   
jim19


 

Posts: 58
Score: 100
Joined: 3/4/2004
Last Login: 6/13/2013
From: Alamogordo, NM, USA
Status: offline 		Don't know why the pics didn't show up in the last post, but here they are.

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RE: Gemini GT-40 build - 1/24/2013 4:17 AM   
jim19


 

Posts: 58
Score: 100
Joined: 3/4/2004
Last Login: 6/13/2013
From: Alamogordo, NM, USA
Status: offline 		Pic 1 shows whell well lining (1/16" balsa) installed and bottom of wing sheeted. Pic 2 shows forward nacelle top installed and top of wing sheeted. Pic 3 shows tank and servo access cover in place and botom aft nacelle assembled. Pic 4 shows top aft nacelle assembled.

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RE: Gemini GT-40 build - 1/24/2013 4:19 AM   
jim19


 

Posts: 58
Score: 100
Joined: 3/4/2004
Last Login: 6/13/2013
From: Alamogordo, NM, USA
Status: offline 		Pic 1 shows whell well lining (1/16" balsa) installed and bottom of wing sheeted. Pic 2 shows forward nacelle top installed and top of wing sheeted. Pic 3 shows tank and servo access cover in place and botom aft nacelle assembled. Pic 4 shows top aft nacelle assembled.

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RE: Gemini GT-40 build - 1/25/2013 4:26 AM   
jim19


 

Posts: 58
Score: 100
Joined: 3/4/2004
Last Login: 6/13/2013
From: Alamogordo, NM, USA
Status: offline 		Pic 1 shows aileron hinged (not glued in) and set in place. Pic 2 shows flap guide wire in place and surface side flap hinges in place. Guide wire aligns these hinges. Pic 3 shows flap set in place and hinges epoxied in flap. Pic 4 shows wingtip installed.

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RE: Gemini GT-40 build - 1/26/2013 10:23 PM   
jim19


 

Posts: 58
Score: 100
Joined: 3/4/2004
Last Login: 6/13/2013
From: Alamogordo, NM, USA
Status: offline 		Simple cowling assembly. Pic 1 shows cowl mounts installed and engine temp mounted. Spinner backplate is tack glued to spinner ring using 3/32" balsa spacers. Pic 2 shows cowl side attached to nacelle and glued to spinner ring. Pic 3 shows cowl top and bottom attached to cowl and glued to spinner ring and cowl side. Once glue has cured, spinner backplate and engine are removed. Pic 4 shows balsa triangle fillers in place. Pic 5 shows cowl sanded to shape.

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RE: Gemini GT-40 build - 1/30/2013 10:16 PM   
jim19


 

Posts: 58
Score: 100
Joined: 3/4/2004
Last Login: 6/13/2013
From: Alamogordo, NM, USA
Status: offline 		Pic 1 shows wing center section in place on the fuselage, forward wing pegs and wing mount bolts installed. Pic 2 show bottom sheeting installed and wing bolt holes counterbored for recessed bolts. Pic 3 shows center section top sheeting installed and cut out for flap servo and servo wiring. Pic 4 shows main turtledeck bulkheads and turtledeck sides glued in. Pic 5 shows remaining bulkheads glued in and side pulled together for proper contour. Pic 6 show turtledeck top sheeting installed.

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RE: Gemini GT-40 build - 1/30/2013 10:20 PM   
jim19


 

Posts: 58
Score: 100
Joined: 3/4/2004
Last Login: 6/13/2013
From: Alamogordo, NM, USA
Status: offline 		Pic 1 shows empennage assembly assembled, rudder and elevators sanded to taper at trailing edge. Hinges are in place but not glued in. Pic 2 shows ventral fin installed. Pic 3 shows empennage set in place for check fit. Model is now ready for filler (light-weight spackiling compound) where needed and final sand, then covering.

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RE: Gemini GT-40 build - 1/31/2013 3:07 AM   
hoops


 

Posts: 22
Score: 100
Joined: 3/18/2002
Last Login: 6/6/2013
From: Placentia, CA, USA
Status: offline 		Jim, you make it all look so simple and straight forward.
Nice work.

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       Post #: 10

RE: Gemini GT-40 build - 2/4/2013 11:34 PM   
jim19


 

Posts: 58
Score: 100
Joined: 3/4/2004
Last Login: 6/13/2013
From: Alamogordo, NM, USA
Status: offline 		This Gemini GT-40 is finished. Model is assembled, engines, retracts and radio installed.

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       Post #: 11

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