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The single bladed props on model airplane Line-control speed racers have a counterweight that is aft of the thrust-face of the prop. That balances the force on the crankshaft from the single blade
...

Every pusher prop I ever heard sounds funny. even model airplanes that are pushers

I hadnt seen Burls J3 tab. nice! He makes nice stuff.

Have been using a strap around the spar junction after removing a fairing for years.

Eyes off metal spars like a SuperCub would be very...

Installing the Wip upgross is not difficult, in my experience. I did one in the 90’s.

It involves a rear spar cap reinforcement and wing rib reinforcement gussets to alleviate crumpling of the...

I didnt take time to load and watch the vid.

Some ski installations have a strong spring on the rear cables for any extreme “ski-noseup” events. The aft spring needs to be stronger than the front...

Just for discussion. Please describe your 180hp Cubs. Thanks

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Following along with Ed’s statements, and giving Mark Englerth and the ThrustlineMod credit:

1. O-360’s usually have a coarser pitch prop than an O-320 prop. Thus, at idle they are pulling harder,...

Be careful with Lexel and large gaps. It will continue to shrink over the years. Also, the white Lexel will yellow over time.

And Lexel stinks, and stays kindof “sticky” for awhile.

In my...

If yu want to improve aileron authority and also high AOA flight regime safety, put a Sportsman STOL on your 180.

I think it is the best cuff. Am not sure VG’s are necessary with the Sportsman...

this

Anthony. I agree with you in all points.

This would likely be a drag-reducing tip. But is it a lift-adding tip?

I will add that any droop tip will trap high pressure air on the undersurface...

I noticed you used a surfing sequence twice.

glad you have nice wx.

whats you new Avatar about?

The Kolb ultralight designs are enduring and seem to hold their value

I had always thought they would be super neat if I lived in warm climate

That prop pitched to 45 inches on a strong O-360 pulls really hard, AND gets 104 mph cruise on a friends widebody EXP -18 with extended wings and 31’s. He throttles wwwaaaaaayyyy back to not outrun...

Gary. the span really doesnt appear to be increased. I have not measured, but it is very close to stock-appearing in span.

STC SA2490WE does not come up.

In the records the...

Guys....Cheers and Thanks to the Seattle Aircraft Certification Office.

This was a field approved alteration and I know the mechanic and the ASI that signed the approval. Many other Anchorage...

Gary. thats my thought. They look great!

the assembled plane is not mine
the wings on the trailer are.

The workmanship is beautiful and if I can document them I will fly em.

I will...

a couple of photos

Have been doing the resistance check for years now. IT NEEDS TO BE DONE

It is part of plug maintenance and ignition system troubleshooting in my world.

Anyone wonder how a magneto and harmess...

thanks for your replies guys.

Seattle ACO called me this morning and are doing what they can to make sense of that STC SA2480WE. MAYBE ITS A TYPO

Gary, the 337 record for this aircraft reads something like “...reference STC SA2490WE. Installed 0-360 etc etc and modified wing tips in accordance with John w Thorp installation instructions dated...

Gary, yes, that -14, and tip shape looks like the Islander without upsweep.

No joy with search function. I found a link to Jerry Burrs discussion, but was redirected to sc.org homepage several...

Hi. I am bumping this thread to see if any new thought juices have flowed on the topic since 2014.

Also, I will post photos in a couple days of a Cub tip shape I had never seen before. It is...

FYI.....-12 and -14 are same width down there.

Cliff is a wealth of knowledge however you slice it, tho. ........and happens to own a -12