stunthanger.com

Speed,Combat,Scale,Racing => Carrier => Topic started by: Bob Heywood on July 14, 2016, 03:39:58 PM

Title: New Navy Carrier Model
Post by: Bob Heywood on July 14, 2016, 03:39:58 PM

Just finished my .15 Grumman XTB3F-1. Gary Hull design with Fox power. Monokote / LustreKote finish. Conventional old skool controls. Thought I'd try the inboard motor to keep all of the mechanism on one side of the fuselage. "NATS or Bust..."


(Edited to add pic of the real XTB3F-1)

Title: Re: New Navy Carrier Model
Post by: eric david conley on July 14, 2016, 04:33:41 PM

     That is one of the prettier models that I have seen in a long time. How much weight is in the outboard wing to off set the inboard engine?

Title: Re: New Navy Carrier Model
Post by: Bob Heywood on July 14, 2016, 04:45:46 PM

Quote from: eric david conley on July 14, 2016, 04:33:41 PM

     That is one of the prettier models that I have seen in a long time. How much weight is in the outboard wing to off set the inboard engine?

1-1/2 oz in the tip, 14" from the fuselage centerline. When the plane is suspended from the prop shaft and the rear of the fuselage it rotates all the way down right wing low. Without the motor in place it almost wouldn't sit on the landing gear.

Title: Re: New Navy Carrier Model
Post by: eric david conley on July 14, 2016, 08:47:01 PM

     Usually I put in 2 to 2.5 oz tip weight in a AMA profile and it is 20+inches out on the outside wing and the engine is on the out side of the fuselage. With the .15 planes I'll put 3oz in and go from there because the wing is so much shorter and I loose a lot of leverage with the shorter span. I also use 7+ degrees of out thrust (sometimes 9-11 degrees) on the motor or engine as these planes need all the help they can get along with enough power to overcome the out thrust and tip weight. This is the beauty of flying your plane a lot, 20 to 30 or more times to learn what you can get away with, and just to get acquainted with your plane. So fly your plane and adjust from there, it sure is a nice looking plane. I think Ron Duly made one like yours, silver and blue and flew quite well.

Title: Re: New Navy Carrier Model
Post by: Bob Heywood on July 15, 2016, 07:49:32 AM

Eric,

I appreciate your comments and encouragement. One step at a time...

Title: Re: New Navy Carrier Model
Post by: bill bischoff on July 15, 2016, 07:55:22 AM

Very nice! Your shop is way too clean, BTW. H^^

BB

Title: Re: New Navy Carrier Model
Post by: Mark Knoepfle on July 15, 2016, 12:44:48 PM

Shop?! I thought that was an operating theater! Very clean build. Beautiful plane Bob.

Mark

Title: Re: New Navy Carrier Model
Post by: Bob Heywood on July 15, 2016, 01:57:48 PM

Thanks for the comments. Of course you should have seen the shop 15 min. before the photo shoot and you can't see what's outside the frame...

Title: Re: New Navy Carrier Model
Post by: BillCalkins on July 15, 2016, 03:41:47 PM

I had to dig out my workbench to build my Nats entry.