This film shows the second trim session of the 37" free-flight rubber-powered Burnelli Transport concept aircraft from 1947, flown in Wawayanda, NY. Filmed by Tom Hallman on 6.3.24 with a Canon PowerShot SX20, and iPhones 11 & 14Pro. Fantastic photos taken by Peter Kaiteris with a Nikon D3400 70-300mm. Music via the talented musicians at ArtList.io, who breathe life into my films.

Trim session notes:

The cracked right prop spar was replaced, along with the thrust plates, which were at the edge of holding their position beneath the flathead screws. This led to a slight shift in the thrust, which was adjusted at the field after the morning trim session. I continued preferring the right pattern at launch, through the use of 1/32" thick gurney flaps on the TE & right rudder.

But the tilt of the wing was too much, which prevented her from climbing at the power burst, so on the final golden hour flight, I trimmed the gurney flaps a bit, which helped flatten the initial power portion, giving her a wider circle and higher climb. I also added more nose ballast, which helped keep the nose down during the power portion, and did not seem to hinder the glide.

Max winds might not be as much as I had hoped, but so far, she's up to 1740. I'd like to get a bit higher, closer to 1900. She still has a slight stall during some of the glide portions, which will get more attention in future sessions.

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Wiki on Vincent Burnelli: https://en.wikipedia.org/wiki/Vincent...
News reel footage of the similar design from the late 40s:    • HD Stock Footage Canada Demos CF-BEL-...  

Making props from a cheese container:    • Free-Flight Basics #11 - Making Props...  

Here's a source for rubber: https://www.faimodelsupply.com/produc...
Generic rubber turns calculator: http://hallmanstudio.com/rubber_turns...

Article on the use of dethermalizers: http://www.hallmanstudio.com/DT.pdf
Badge Classic DT & spring (at the bottom of the page): http://www.starlink-flitetech.com/tim...

*** 10 steps to trimming a rubber model, by John Koptonak: http://www.flyingacesclub.com/PFFT/Tr...

Also, these tutorials from Easy Built Models: https://easybuiltmodels.com/tips.htm#...

Looking for a Flying Aces Club near you? Check out this link: http://flyingacesclub.com/wp/about-th... If you click on the map at the area closest to you, it will automatically bring up an information request link. That request goes to FAC GHQ and also to the Squadron Commander of record for that squadron.

For more info on free-flight rubber-powered models, check these websites:
https://brooklyn-balsa.square.site
http://www.easybuiltmodels.com/
http://www.volareproducts.com/BUY/
http://www.flyingacesclub.com
National Free Flight Society - https://freeflight.org/
Mike Stuart's Flying Scale Models - http://www.ffscale.co.uk/
https://www.freeflightsupplies.co.uk

Flying Aces Club merchandise: https://www.cafepress.com/flyingacesclub
All profits support Flying Aces Club activities.
Center of Gravity merchandise: https://www.cafepress.com/centergravity