Free plan: Glenny & Henderson Gadfly by Sherman Gillispie - RC Groups
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Jun 08, 2010, 07:05 PM
High Exalted Poohbah
planeman's Avatar

Free plan: Glenny & Henderson Gadfly by Sherman Gillispie

Here's another one. Its the Glenny and Henderson "Gadfly", an entrant in the well known British Limpne Trials for ultra-light airplanes in the early and mid 1920s ( This one was designed by Sherman Gillispie and was a plan in the April 1955 Model Airplane News. Anything Sherman Gillispie designs will fly fantastically well and this is one of his best. I have built four models from this plan over the years beginning with my April 1955 issue of MAN when I was fifteen. Its the BEST flying scale rubber model I have ever built! If you can't get this one to fly great you should give up and find something like collecting stamps for a hobby.

Use the .PDF file to build from.

Have fun!

Last edited by planeman; Jun 10, 2010 at 03:05 AM.
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Jun 08, 2010, 07:12 PM
Matt Haugh
hoffboy's Avatar
Pretty much the definition of cute. Tempting to enlarge just a tad for RC.
Jun 09, 2010, 12:05 AM
skumgummi dave
Poohbah,Poohbah,Poohbah,Poohbah,Poohbah.....Rah,Ra h,Rah.....Thanks!

Jun 09, 2010, 08:32 AM
Intermediate Multi
Trisquire's Avatar
...........and a Gadfly flight. Not sure if its the same scale or not:

Gadfly in Geneseo, NY 1994 (2 min 9 sec)
Jun 09, 2010, 09:47 AM
Fot-li fort!
Hinomaru's Avatar
Planeman, thanks for sharing the plan, it's a very very nice model. What's its span?

Trisquire, fantastic flight. This Gadfly has a DT, am I wrong?
I think the Gadfly in the video is much bigger than Planeman's, maybe twice as much, don't you think so?
Jun 09, 2010, 12:45 PM
Intermediate Multi
Trisquire's Avatar
I don't see a DT in the pics:

Its Tom Hallman's 36" span Gadfly. I'm guessing it was a dawn flight, judging from the fog and lack of wind. Tom's got a whole slew of interesting rubber scale videos on his YouTube account.
Jun 10, 2010, 02:01 AM
High Exalted Poohbah
planeman's Avatar
Yup, that's the way all of my Gadflys flew! The Gadfly will glide very well, a lot better than the one in the video. All rubber powered models should first be trimmed to glide with NO POWER. Once you get the best glide (close to a stall but no stall), THEN you make all adjustments using power with variations in thrust adjustment.

Jun 10, 2010, 01:35 PM
Registered User
Interested to see no apparent incidence difference between wing and stabiliser - rigged zero/zero.

How much amendment required for flying?

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