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Speed,Combat,Scale,Racing => Speed Talk => Topic started by: Jim Kraft on February 12, 2014, 08:41:23 PM

Title: New Perky on the block
Post by: Jim Kraft on February 12, 2014, 08:41:23 PM

This Perky was built by Andrew Hathaway, and I finished it up. Fox 15X for now. I do have a steel fin that fits the same if the 15X does not pan out. It seemed to work pretty well on the bench, so we will see.

Title: Re: New Perky on the block
Post by: James_Mynes on February 13, 2014, 05:31:02 AM

Very nice, Jim. I got my Perky kit in the mail on Monday. I've gawked at a couple of them, and I'm concerned about the tank. Doesn't seem to be much room in there. What did you use?

Title: Re: New Perky on the block
Post by: Paul Smith on February 13, 2014, 06:23:09 AM

I made mine split in half like a pan rat.  It's a lot easier to work with the controls and tank.  As the picture shows, the tank forms part of the left side of the fuselage.

Title: Re: New Perky on the block
Post by: James_Mynes on February 13, 2014, 08:21:45 AM

Paul, that split construction opens up new possibilities. Not sure if the kit will accommodate the change, but it's certainly worth looking at.
I was told to shoot for 1.5 oz fuel capacity, which should allow for starting, tweaking, walking to the handle, and 16 laps with a comfortable margin. I'll be using a Fox .15 BB that I picked up oh, 20 odd years ago, never ran it until Tuesday. It seems like a strong engine.
Is that the same engine in both your pictures? One shows side exhaust, the other rear, but the head looks the same. Does the cylinder mount in different configurations?

Title: Re: New Perky on the block
Post by: john e. holliday on February 13, 2014, 09:11:30 AM

That don't look like a Fox .15 to me.   Sure it is not a Nelson?

Title: Re: New Perky on the block
Post by: BillLee on February 13, 2014, 09:23:24 AM

Gracious, Doc, it's 9:30 in the morning, surely your eyes are working better than that!  ;D

Paul's model is with Nelson power, two different engines, one FIRE and FISE.

The models with (or to be for) the Fox was Jim Kraft's and/or Jim Mynes.

Title: Re: New Perky on the block
Post by: Paul Smith on February 13, 2014, 02:52:57 PM

One ounce gives about 50 to 60 laps on an LA15-powered Clown racer.   

So I think a half-ounce would be plenty for Perky with any engine.

Title: Re: New Perky on the block
Post by: Jim Kraft on February 13, 2014, 07:21:41 PM

I forgot the dimensions on mine but it looks about the same as Pauls only a very slight wedge. Both the overflow and uniflow vents exit on the left side of the cowl. I am guessing it is just over a 1/2 ounce. I did find the smaller the tank the harder they are to fabricate. I have made several of them for my free flights I fly with a radio and old sparkers, so I am getting experienced.