F-19 Cowl Bumps

[Fjquast]

It has been awhile since I have checked in and hope everyone is doing well. The F- 19 just came out of annual and I have a few small items to focus on over the next year to keep it looking good.
1) Does anyone have a good place to purchase some cowl bumps?
2) I will also be looking for some engine mount rubber over the next year. Any advice or contacts would be appreciated!
3) Does anyone run Vortex Generators on their airplane? I'm curious what you think of them. They work well on a Chief we have and I was seeking some feedback on the TC as well.

https://www.emapa.aero/Taylorcraft-Micro-Vortex-Generators-p/taylorcraft.htm

https://www.aircraftspruce.com/catalog/appages/microvgkits11.php

I know crammed a few questions in a single post and I hope that doesn't deter anyone.

[Nefj40]

VG's, do it. They are a great add-on. The cowl bumps, if you have a decent one, just get some fiberglass and make some using the original one as a mold.

[PA1195]

I'd not fly the Taylorcraft's NACA 23012 airfoil without VG's if slow flight and steep turns were normal ops, especially when heavy. Load the wing and the stall gets more abrupt. The VG's smooth the pressure peak near the leading edge at high angle of attack and ultimately the stall behavior.

Helio Courier figured it out and added leading edge slats to that wing.

Gary

[Taylorcrafty]

I'd not fly the Taylorcraft's NACA 23012 airfoil without VG's if slow flight and steep turns were normal ops, especially when heavy. Load the wing and the stall gets more abrupt. The VG's smooth the pressure peak near the leading edge at high angle of attack and ultimately the stall behavior.

Helio Courier figured it out and added leading edge slats to that wing.

Gary

There is definitely more abrupt stall when heavily loaded. Can be useful for short landing, but can also be dangerous.

[Taylorcrafty]

It has been awhile since I have checked in and hope everyone is doing well. The F- 19 just came out of annual and I have a few small items to focus on over the next year to keep it looking good.
1) Does anyone have a good place to purchase some cowl bumps?
2) I will also be looking for some engine mount rubber over the next year. Any advice or contacts would be appreciated!
3) Does anyone run Vortex Generators on their airplane? I'm curious what you think of them. They work well on a Chief we have and I was seeking some feedback on the TC as well.

https://www.emapa.aero/Taylorcraft-Micro-Vortex-Generators-p/taylorcraft.htm

https://www.aircraftspruce.com/catalog/appages/microvgkits11.php

I know crammed a few questions in a single post and I hope that doesn't deter anyone.

1) Are these cowl bumps for the spark plugs or the C150 exhaust?
2) I got mine from Aircraft Spruce.

[astjp2]

Univair Carries a nice spark plug bump for the ercoupe

[Robert Lees]

I'd not fly the Taylorcraft's NACA 23012 airfoil without VG's if slow flight and steep turns were normal ops, especially when heavy. Load the wing and the stall gets more abrupt. The VG's smooth the pressure peak near the leading edge at high angle of attack and ultimately the stall behavior.

Helio Courier figured it out and added leading edge slats to that wing.

Gary

The NACA 23012 airfoil as fitted to our beloved Taylorcraft is also the same airfoil section fitted to (for example) the outboard sections of the DC3, and the whole section of various Beech designs including the so-called "Doctor-killer" Bonanza. It's a very efficient aerofoil, in terms of lift over drag. It's one of the reasons a Cub will be slower than a Taylorcraft on the same horsepower.

The 23012 airfoil has a wicked sudden stall characteristic, particularly at high wing loadings; fortunately for us, CG Taylor knew his stuff and used this section because of its efficiency. Also, because of our low wing loading (weight) and long span, the stall is very benign, with the appropriate use of rudder.

[PA1195]

I believe the VG's reduce that leading edge discontinuity Robert. This link at page 272 plus or minus describes the NACA 23012 airfoil and its behavior. Scroll down for a free look.

Gary

[Robert Lees]

I believe the VG's reduce that leading edge discontinuity Robert. This link at page 272 plus or minus describes the NACA 23012 airfoil and its behavior. Scroll down for a free look.

Gary

Indeed you are right Gary! But Vgs get in the way of washing chores, and I don't fly into such short strips in the UK where Vgs become important! If the wind is over 15kts, I just land into wind!
Take care; fly safe!