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Oct 21, 2016, 12:29 PM
Thomas B.'s Avatar
Build Log

The Trottel - a simple and versatile aerobatic/3D machine, free plan

The Trottel (German for fool) is a very simple, not very beautiful flying machine that takes a lot of abuse. Quick and easy to build with excellent flight behaviour.
Modell AVIATOR: Downloadplan-Modell "Der Trottel" aus Heft 12/2016 (3 min 21 sec)

It is a free downloadplan in German Modell-Aviator magazine 12/2016
Download is here:
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Oct 22, 2016, 08:20 AM
Thomas B.'s Avatar

flight video

Neue Kunstflugfigur: Der Rohlmann! (1 min 31 sec)
Oct 22, 2016, 03:56 PM
Thomas B.'s Avatar

Specs and equipment

Span: 600mm
Airfoil: KFm 4
material: 6mm Depron
weight: ca 200g
motor. 20g outrunner
battery 2 - 3 s 450mAh
servos: 6-9g

It flies similar to the Eflite 280 Edge and Inverza, but is easier to control.
Ideal for recycling 280 equipment from damaged models.

Der Trottel fliegt überall (2 min 7 sec)
Oct 23, 2016, 04:42 AM
Going back to balsa
Painting the airplane while it is in a hover. I do enjoy the way that you do things, Thomas.

I wish that I had thought of that.
Oct 23, 2016, 04:47 AM
flyin' fool
goldguy's Avatar
A paint brush on a long handle would be safer.
Oct 23, 2016, 06:59 AM
Thomas B.'s Avatar
Yes, with a ghostbuster - style compressor backpack!
Oct 29, 2016, 03:56 PM
Thomas B.'s Avatar

KungFu and Trottel vertical take off

Trottel is capable of VTO:
Stephan startet senkrecht (1 min 19 sec)
Jun 15, 2017, 09:18 AM
flyin' fool
goldguy's Avatar
Can't believe the lack of interest in this wonderful design. At one time everyone had a Stik. Phil Kraft's Das Ugly Stik from 51 years ago was a mainstay of the hobby, way before we discovered the advantages of electrons and 3D flying. Most all designs based on this platform are still called Ugly Stiks around here. Well, by us ol' dudes anyways.

A couple being built locally as we speak.
Jun 16, 2017, 03:51 AM
Registered User
Dear Thomas B.
Can you give more detail to build this plan?
Jun 23, 2017, 05:32 PM
flyin' fool
goldguy's Avatar
A few mods ...................
Jun 24, 2017, 08:26 AM
flyin' fool
goldguy's Avatar
If your using cheap 5 gram servos you can enhance their performance and life span by taking the top off and greasing the gears liberally. I use a #6 cut off round paint brush and Teflon based grease. Make sure you get lots on the output bearing surface, which is just a molded plastic shoulder.

Once done, work the servo on a tester for a few minutes. The first thing you'll notice is how nice and quiet they are.

Good to do on those cheap 9 gram ones too. Actually, I do this to all my servos, even the expensive MG BB digi ones.

Lots of grease at the top keeps the water out.
Last edited by goldguy; Aug 09, 2018 at 01:21 PM.
Jun 24, 2017, 05:41 PM
Retired CAD guy
birdofplay's Avatar

This looks close to my Top Dawg Design for Foam.

As mine is set up for racing I never considered doing 3D with it.

But , I DID try and now I believe that if I increase the surfaces size
or possibly just the Deflections to 3D proportions
that it might be more equivalent to your Trottle.

Thanks for waking me up to another possibility.
Jun 25, 2017, 12:13 AM
flyin' fool
goldguy's Avatar
You can 3D just about anything with enough thrust and big control surfaces. Big surfaces because they rely on them moving air generated by the prop when flying slow or hanging around. Lots of rudder authority is a must.
Jun 25, 2017, 08:49 AM
flyin' fool
goldguy's Avatar
Off to maiden..................
Jun 25, 2017, 08:06 PM
Registered User
Originally Posted by goldguy
A few mods ...................
Thankyou so much goldguy!

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