nlappos

Aircraft Spruce has them

https://www.aircraftspruce.com/catalog/appages/skullcap1.php

Aircraft Spruce has them in stock

Here is the info I used for replacing the struts on my Avid Mk IV. I used the .47" struts. I had to cut the rod shorter by about 1" and rethread the end fitting, probably because I didn't measure the length properly!

https://www.mcmaster.com/catalog/130/1496/9416K12

The springs also tend to center the rudder in the absence of pilot foot forces. 

Just sent some. Thanks for doing the heavy lfting

Jim

Maybe you could post the rib pattern scan in the Files and Forms section for posterity.

These leading edge devices act like vortex generators, Interesting stuff! Here is more on them:

https://aviation.stackexchange.com/questions/12842/how-turbercle-wings-could-generate-aerodynamic-advantage

Washout is one of those internet things where an idea with almost no merit becomes a full on debate point. Ethanol in fuel is another thing that somehow is deemed pure evil, but let's save that for another day.

The amount of washout on an Avid is low, but in the pack for all airplanes. Reduce the washout at your own risk, it serves a real purpose in providing roll control while near stall. Somehow washout gets to be the whipping boy for reducing cruise speed, I am not sure why. A degree or two reduction of angle of attack at the wing tip actually makes the overall wing more efficient, since it makes the lift distribution come closer to the ideal elliptical wing.

Welcome! Good luck with your new aircraft, the Catalina is a great aircraft.

Let me agree with 1avidflyer that car engines often cost you 75 to 100 lbs of useful load, CG headaches and lots of fitting problems. The 912 variants are fine engines, and so too is the 670, with 92 HP and easily fitted 582 mount. The nice thing about the 670 is it weighs only about 15-20 lbs more than the 65 HP 582, but matches the smaller 912's in HP. I swapped my 582 for a 670 on my Avid Mk IV, and it was all upside. Great engine, lots of power, starts easily and fairly low fuel burn.

The 670 is also about 1/2 the cost of a 912, esp from Rotax Rick. Less than $6K complete.

AS far as modifying the Catalina, not too many were built, and the design works very well, so I bet few folks tried to modify them as you want to. But hey, our hobby is exactly what you want to do, so have at it!

Thinking about what engines to try, there is a good Yamaha Apex following on this site, and the weight/power of the 4 stroke with electronic Fuel Injection is eye watering. Might be worth a look, it seems you can get 130+ HP out of them with a pretty reliable kit.

Every chance I get I advocate a close look at the Rotax 670. At 92 Hp, and a simple drop in on a 582 mount, and at about 20 lbs more than a 582, it is worth a close look. If you have a 582 to swap, Rotax Rick will send back a zero time 670 for about $5300, a flat out bargain when you look at 912's.

Great Idea, Jim!

Engine failure after takeoff?  https://www.uppermichiganssource.com/2023/06/24/1-dead-1-injured-after-small-plane-crashes-into-northern-lake-michigan/

Registration is like the license plate, easy to renew, even if lapsed. Worst thing is a new N number, just a PITA for the paint job.

Airworthiness certificate is a whole other ball of wax. It is FAA agreement that the aircraft is safe to fly, and involves every rivet. Ask him to get another copy as a term of the sale, and don't pay till you see it and the limitation. If he cannot get one, walk away. If you ever had to redo the Airworthiness, it is not an easy job, and with no build paperwork and photo book, probably a very very daunting task.

Nick

It is. But too much better means our interest rates are high, and that's not good, either. It also means US goods cost more overseas. See the chart, the big spike on the left is when Reagan drove the interest rates way up. I bought a great meal in Paris for about $35 back then!

Yea, if there really were conspiracies, things would run a lot better!

The dollar has been steady against other first world currencies for decades.

Thank Trent Palmer, who really popularized the KF and showed the fun we all have.

Jeromif

Can I suggest that you consider swapping your 582 for a 670, at about 92 HP. I did this a few years ago, using a swap arrangement with Rotax Rick. The same 582 mount works well, and the fit is almost drop in, and you get over 90 HP. It is about half the cost of the 912 and very much less airframe mod. https://rotaxrick.wordpress.com/pricing/

Here is an old but interesting article on Avid and Kitfox safety, just found it this morning.

https://www.kitplanes.com/safety-is-no-accident-3/

Here is an old but interesting article on Avid and Kitfox safety, just found it this morning.

https://www.kitplanes.com/safety-is-no-accident-3/

Here is the complete set of my airplane inventory sheets, 19 sheets total, for my Avid Flyer Mk IV. 1994, s/n 1174D

Here is the complete set of my airplane inventory sheets, 19 sheets total, for my Avid Flyer Mk IV. 1994, s/n 1174D

Avid Inventory Sheets.zip

Great point. Also, 5606 is really kerosene, highly flammable. Silicone is not flammable.

If all else fails........

Tiny2AInstructions11263.pdf

The factory heater works reasonably well on my Avid Mk IV, and was easy to install. I would bet the diesel heater is much more effective, and the water  radiator heater is probably just the same as this factory one (same radiator area?).

Here is my installation, note the flapper valve box on the firewall is actuated by a pull cable I installed, using a cheap choke cable kit.