Cox Engines Forum
You are not logged in! Please login or register! Guests are limited to posting in the "General Questions (Guest Posting Allowed)" section only. Becoming a member is fast, easy and FREE!


Log in

I forgot my password

Search
 
 

Display results as :
 


Rechercher Advanced Search

Latest topics
» The Aurora L-19 Bird Dog, more than just an airplane
by GallopingGhostler Today at 4:48 pm

» Lil Tiger - Gloss Pumpkin Orange
by GallopingGhostler Today at 3:37 pm

» Comet Belond
by DrCox Today at 12:08 pm

» Pee Wee Horseshoe back plate
by Kim Today at 10:46 am

» Ring Rat 100
by getback Today at 9:52 am

» Anyone recognize this model airplane?
by rsv1cox Today at 9:23 am

» Engines/parts for sale
by robot797 Today at 5:03 am

» Cox aluminum piston?
by 1/2A Nut Today at 1:04 am

» Another proposed design by Roddie
by roddie Yesterday at 11:07 pm

» The Cars are the Stars Contest.
by Cribbs74 Yesterday at 10:32 pm

Cox Engine of The Month
February-2019
balogh's

"Black Lynx .049 with a Throttle, Exhaust Deflector and Nelson-Galbreath head set"



PAST WINNERS
Speed Contest 2018
CEF Traveling Engine

Win This Engine!
The Traveling Prop
Gallery


World of Aviation

PT-19 You-Fly tips

Go down

PT-19 You-Fly tips

Post  jmendoza on Sun Jul 23, 2017 12:55 pm

Here are some tips that will really help out the last version of the PT-19, made in China.

Remove the plastic flash using an emery board from the upper half of the clam shell hinge in the rudder, do the same for the fuselage . This ensures the elevator does not bind and flops down on it's own weight. Check the elevator for any flash that would cause it to bind as well.

The push rod is trapped under the bell-crank and binds, to fix that, remove the bell-crank screw and bell-crank. Remove the push rod wire and re-install it in the bell-crank so that the push rod sits on top of the bell crank. You need to have the push rod removed from the elevator to do this. Replace the push rod in the hole closest to the elevator for more control/stunt.

Perform the engine prep as I outlined in the engine forum under Sure-Start, be sure to orient the tank pick-up to the outside of the circle.

Remove any burrs from the wing lead out holes. Use a single length of Spiderwire (Spectra) to loop through the control handle and tie to the bell crank to obtain 42 foot lines. The Spiderwire is much lighter and thinner than the original Dacron lines and less drag.

With these few tweaks, the PT-19 is a blast to fly, and I run the engine at a clean 2-cycle to insure plenty of line tension and help it through loops.

Have fun! Jay



Bend up the ends of the wheel axles to prevent the sharp crimps on the axle ends from boring through the plastic hub of the wheel and coming off.
jmendoza
jmendoza
Moderate Poster
Moderate Poster

Posts : 14
Join date : 2017-07-18

View user profile

Back to top Go down

Re: PT-19 You-Fly tips

Post  roddie on Sun Jul 23, 2017 3:54 pm

Good stuff Jay! Thumbs Up Do you fly yours with the 6 x 2 "L/H" prop? I scored some of those props and some other OEM Cox parts when an old LHS closed nearby to me. The owner found them in a box in the back-room..  Shocked




I'm on my 2nd PT-19 fuse.. and the fuel tank-bowl won't stay snapped-on/seated. I tried gluing.. but it wouldn't hold.




There's plenty of room inside the nose and behind the firewall for running a different type of tank.. so I'm not worried about it.




I bent-up new landing-gear-legs for mine.. (same .062" wire) and installed a pair of "Sig" 1/2A wheels (slightly larger 1.375" dia.) with Goldberg-style spring-collars. It helps a little with R.O.G. take-offs from a grass-field.



OEM gear..



Replacement gear/wheels..




I've had a LOT of fun flying this model.. and will check for any mold-flashing at the stabilator.. as you suggested for smooth operation.

Thanks Jay! Thumbs Up










roddie
roddie
Top Poster
Top Poster

Posts : 6271
Join date : 2013-07-17
Age : 59
Location : N. Smithfield, Rhode Island

View user profile http://www.stilburnin.com

Back to top Go down

Re: PT-19 You-Fly tips

Post  RknRusty on Sun Jul 23, 2017 7:28 pm

Good tips, Jay. I'd like to add, the pushrod wire is awful thin on the PTs I've had. Consider using a thicker piece of music wire that has less flex. Or go all out and make a CF tubular pushrod.
Rusty

_________________
Don't Panic!
...and never Ever think about how good you are at something...
while you're doing it!


My Hot Rock & Blues Playlist
RknRusty
RknRusty
Moderator

Posts : 10670
Join date : 2011-08-10
Age : 62
Location : South Carolina, USA

View user profile

Back to top Go down

Re: PT-19 You-Fly tips

Post  Sponsored content


Sponsored content


Back to top Go down

Back to top

- Similar topics

 
Permissions in this forum:
You cannot reply to topics in this forum