2010 Toledo Weak Signals Show

Leon Shulman's Wedgy

Leon's Bio

The Shulman Wedgy as built by Glen Poole of Chicago for Speed 400

And, by Allan Laycock of Australia

The Wedgy was designed by Leon Shulman of the Brooklyn Skyscrapers back in 1940. It was built in 3 sizes but the A size is by far the most common.

Bucky's Wedgy


Hi Tom,

Almost ready to cover. I keep finding little things to do. Maybe I will start covering the tail surfaces tomorrow.

Bucky

Solution to Sailplane Exhaust Extension Problem

My good friend Bill Taylor, who lives up in Tulsa, Oklahoma, built his Sailplane shown below before I built mine last year. Bill was the guy who sent me his exhaust extension design when I was building my Sailplane. Bill developed his extension design for his Ohlsson 60 based on formed sheet brass stock, which was solder together with hooks on the side for spring retention. The design worked perfectly for his Ohlsson 60 installation. So he naturally used the same design when he built his Sailplane powered with a McCoy 60. Due to some health complications and schedule activities, Bill had never had the opportunity to run his McCoy 60 until last week.

During Bill's test runs last week, his McCoy 60 generated so much more exhaust heat than the Ohlsson 60 that it melted the solder and the brass exhaust extension fell off the McCoy engine! After Bill redesigned his exhaust extension using mechanical fasteners, he sent me a letter advising me of this problem along with the sketch below detailing his design modifications. As Bill said, if the extension were to come off during the power climb, the cowl would most likely catch fire and burn up the Sailplane in flight! :O<

By the way, Bill said his McCoy did not overheat running inside the cowl! :O)

First of all, thank you Bill. You may have very well saved my Sailplane from a fiery end. I have used Bill's ideas with a little twist of my own. I selected .025" piano wire and bent up the two hooks shown below. As you can see, I put a "Z" bend on the ends that hook to the sides of the extension.
After unsoldering and removing my original hooks, I inserted the Z-bend into a hole in the side of the extension and used the spring jig shown below to position the hook while it was soldered to the extension.
This is a close up of one of the soldered hooks. Even if the solder softens due to the exhaust heat, the Z-bend has the hook locked in place under spring tension.
Next, as per Bill's suggestion, I drilled two holes through the extension's soldered lapped seam and inserted two 2-56 cap screws made up with lock washers and nuts on the inside of the extension.
This picture shows the two lock washers and nuts on the inside of the brass extension that were easily tightened down with a small ignition box-in wrench. If you look close, you can also see the .025" Z-bend wires pointing forward inside also.
If you look closely in the picture below, you can see the spring that holds the brass exhaust extension in place on the Mcoy's exhaust stack...............................Tandy Walker

Flying Aces Stick

Bucky Walter starting his FA Stick for the Brown Jr. 90 sec. LER event at Donnelsville, OH

assisted by former Midwest S.A.M. veep Bob Laybourne (with pipe)

An article on how to construct this simple model has been reproduced here.

For Indoor Flying!

How to Adjust a Hot Free Flight Model

Continue reading here.

Carrol Allen at Wawayanda

I went down to the field Thursday. The field is in great shape compared to other years. None of the bridges are washed out.

The wind was light to none and the sod was firm but the fields with no sod was very squishy.

The lift was unavoidable as the sun was evaporating the water and it was constant up everywhere.

I took another video with only about 70% turns and the model would have easily done 3 mins. Notice all the water in the fields south of the Wallkill, NY. The water in the Wallkill was right up to the edge of the fields with a very rapid current.

Here's what it looked like 3 months ago.