PT 19 Build

getback wrote:Hey Steve a wild but educated guess would bee from 1973 i am not sure about the needle valve that is in it ,but as we have found out sometimes Cox would use what was on hand or until that run ran out . Are you going to build a Balsa model or acquire parts to build a PT-19 ?  Here is some data ..  https://www.mh-aerotools.de/airfoils/cox_frameset.htm  

I want to build a PT-19, thanks for the link, I now have an idea of what parts to look for.

I have built a Balsa one if i can find a pic , do you have any scale to go with ?


It flys Great , i did get crazy any thought it would do an outside loop > NO it want !!

getback wrote:I have built a Balsa one if i can find a pic , do you have any scale to go with ?


It flys Great , i did get crazy any thought it would do an outside loop > NO it want !!

Wow, that is cool.
I don't (as of yet) have the skill set to build a model such as that.
I want to build a Cox model as issued in 73-75. this is the time frame I was most active with Cox models.
I never flew a plane, always had cars...

Here is my son fling it .

Well there all over ebay for the plastic PT-19 's If i were you i would buy one complete the parts can get expensive $$$

getback wrote:Well there all over ebay for the plastic PT-19 's  If i were you i would buy one complete the parts can get expensive $$$  

I agree, I will keep an eye open for a complete model.

Found the Fuselage and Tail Section,

That looks to be the fuse/tail-version that I have. Mine is 1987 vintage. Your engine-parts are earlier.. (Eric is likely correct on the year) The "first-issue" model had an integrally-tanked "Babe Bee" engine. This was before Cox fully-developed their .049 reed-valve "Product-Engine" which utilized an external fuel tank. The first .049 reed-valve "product-engines" had what's known as the "postage-stamp" backplate/carb.

photo-example below



The plastic model was "molded" for this backplate/engine-mount to fit... but there were no provisions for mounting to the model with screws. These engines were often thrown-away, when the airplane was no longer flyable.

What "you have" is known as the horseshoe-backplate.. which is the next generation product engine carb/back-end. This "can" be mounted to a conventional firewall with #4 x 1/2" wood-screws.

Most PT-19's that I know of, came with a 6"D X 2"P left-hand propeller. This was because a left-hand propeller will "torque-roll" the airplane to the "right".. which increases line-tension when flying conventionally in a CCW rotation.

I should mention... that it appears that your engine-mount (firewall) should be compatible with the fuse that you have. Your fuse has a beginner/expert setting for the engine. This is a pitch up/down adjustment. The top of your firewall should fit-into a series of "grooves" under the fuses' nose.. to set the thrust-angle. There is a "view-slot" on top of the fuse, which shows the chosen position.

In 73, Cox was offering the stepped wall cylinders. Your engine depicts a thick walled cylinder that would've been available later.

Ken Cook wrote:        In 73, Cox was offering the stepped wall cylinders. Your engine depicts a thick walled cylinder that would've been available later.

Ken's correct, it's later than '73, the stepped cylinder came out about '69-'70 for throttle, and thick cylinder '75-'79,  the dual slot exhaust cylinder came out in 1977 or '79 depending on info source. The Tee Dee used the thick cyl. w/ open port.

Here's a breakdown of most of the PT-19 thru the years with a nice video by Kim

Thanks for all the replies, much appreciated!
Won the fuse on ebay, listed as new replacement part. It is a later version than I wanted, but I couldn't pass up the listing as 'New'.
I'm quite sure I will build more than one, and this is the fun part, building from parts. I don't know why, but I find the most enjoyment doing in this manner.

https://www.ebay.com/itm/PT-19-FUSELAGE-AND-TAIL-SECTION-RUDDER-amp-ELEVATOR-NEW-NEVER-BEEN-USED-/173767111560?_trksid=p2047675.l2557&ssPageName=STRK%3AMEBIDX%3AIT&nma=true&si=nvDl0JN0UEEigKgPao%252FAxCdQzdQ%253D&orig_cvip=true&nordt=true&rt=nc

Here's a box 'o bits that might be handy.

https://www.ebay.com/itm/COX-PT-19-FLIGHT-TRAINER-049-Control-line-Airplane-Box-Accessories-spitfire/273684547240?hash=item3fb8dec6a8:g:5CgAAOSwXINcV2LQ:rk:60

Oldenginerod wrote:Here's a box 'o bits that might be handy.

https://www.ebay.com/itm/COX-PT-19-FLIGHT-TRAINER-049-Control-line-Airplane-Box-Accessories-spitfire/273684547240?hash=item3fb8dec6a8:g:5CgAAOSwXINcV2LQ:rk:60

It would be worthwhile to bid on that auction Steve. You need a wing.. and there are "two" in that lot. There are also three engines.. all of which have glow-heads that are likely still good. Spare rudders/stabilators..

Depending on the condition of the fuse(s).. you might be able to build a 2nd airplane.

Thanks for the heads up!
On my watch list...

SteveM wrote:Thanks for the heads up!
On my watch list...

Hi Steve,
What is your avatar photo of? lol, no offence i hope, i look at it and can't figure it out? Thanks

Mark Boesen wrote:

SteveM wrote:Thanks for the heads up!
On my watch list...

Hi Steve,
What is your avatar photo of? lol, no offence i hope, i  look at it and can't figure it out? Thanks

It is the cover of the Pink Floyd album 'Meddle', one of my favorite albums.
I have a love for music as well...

SteveM wrote:

Mark Boesen wrote:

SteveM wrote:Thanks for the heads up!
On my watch list...

Hi Steve,
What is your avatar photo of? lol, no offence i hope, i  look at it and can't figure it out? Thanks

It is the cover of the Pink Floyd album 'Meddle', one of my favorite albums.
I have a love for music as well...

Yes, it is an ear!

(Another Floyd fan).

My favorite is "Wish you were here", but I digress.  There's another thread for this discussion.