Make a Q-Tip Indoor Prop!

ALERT:  March 3 Glastonbury date will be a FULL DAY contest & flying session!

Feb 4 Contest Results in this post.


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Components of the Halley prop.  6 in. dia. Ikara prop shown for comparison.
A Bristol Brownie Peanut Scale Model fitted with a Halley prop described in the featured article.
Brownie’s prop & noseblock close up. Note brass tube bushing and latch free wheeler
Ray’s outstanding Voisin Hydro Peanut Scale model uses an efficient paddle-bladed prop.
Kash builds a Crossbow Embryo model at the Feb 5 Club Mtg at the Georgetown Public Library
Steve E’s unique Kyushu Shinden Canard NoCal at the Feb 4 Georgetown meet.  Note the lightweight indoor style “pusher” propeller.

I Need a Better Prop!


OK, before we get into how to make that better prop, let’s share some important updates.

FIRST: The Sunday March 3 Glastonbury H.S. indoor event will be a Full Day 8am-5pm Contest and Flying Session .  This is a make-up for the cancelled January full day session.  Remember, there is no February Glastonbury indoor flying session, so be sure to make the March 3 Full Day session.  Hooray, and thanks to John K for setting this up!

SECOND: Results from the Feb 4 Georgetown, MA meet are below:

2/4 FAC Kanone Report – Sheet 1

2/4 FAC Kanone Report – Sheet 2

Make a Lightweight Indoor Prop

At the Glastonbury, CT high school indoor sessions, you may have noticed a tall gent flying some incredibly small (isn’t that always the way), beautiful and well-behaved models.

Well, on very small and light models such as those that clubster Doug Halley flies, the right prop is critical.  A commercial one-piece plastic prop (eg Peck, North Pacific, etc.) can sometimes be just too heavy, or maybe a different pitch is needed.  Our Stealthy roving reporter caught up with Doug and asked for more info on the unique adjustable paddle-bladed props on his models.

Doug came through with a detailed article outlining how to make his “Q-Tip Prop” and where to get the components used to build it.  Tom N built a Q-Tip prop for his Peanut Scale Bristol Brownie and can attest to its ease of construction.  The Brownie won a Peanut Scale event outdoors at a recent FAC Nationals with this prop.

Paddle-bladed props like this work great on lightweight models such as the super cool Kyushu Shinden that Steve E was flying at the Feb 4 Georgetown indoor meet.  Be aware, however, that these props are not “legal” for some competitive events – Dime Scale, Chameleon One-Design, for example – they’re too good!

Many thanks to Doug H for sharing his excellent lightweight indoor propeller design with us.  And better yet, how to make it and set the pitch!

How to Make a Q-Tip Prop 

Mechanics of the Leading Edge

Indoor flying: Glastonbury CT on March 5 , Georgetown MA on March 12.

Be there!


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Our Author William S.

A flyer gasps as his model approaches the basket!

Drat my Leading Edge busted!


We recently learned about Young’s Modulus and failure stress
for balsa as a function of density (Material Properties of Balsa for FAC Modelers).

And now our engineer-author William S. is back with a follow up; Mechanics of the Leading Edge.   William tells us he took the deep dive into all this technology to solve the age old indoor flyers question “what leading edge won’t break when my plane hits a basketball hoop?

And to think some of us see these stick and tissue models as just simple toys!  Ah yes, to the uninitiated perhaps…

Read the latest article now

Mechanics of the Leading Edge