Airplanes and Rockets' history & copyright Google search American Modeler Air Trails American Aircraft Modeler Young Men Hobbies Aviation Flying Aces Saturday Evening Post Boys' Life Hobby Distributors Amateur Astronomy Engines & Motors Balsa Densities Silkspan Covering Comics Electronics My Models Model Aircraft Articles Plans Model Boat Articles Plans Model Car Articles Plans Model Train Articles Plans 1941 Crosley 03CB Radio Model helicopter articles & plans Crosswords Model Rocket Articles Plans Restoration Projects Photos Peanuts Collection Model Aircraft Articles Plans Sitemap Homepage Hints and Kinks Amateur Radio Archives of the homepage R/C Modeler Electronics About Airpleans and Rockest, Disclaimer, Terms of Use Model Topics Please Donate to Airplanes and Rockets Parole Plaza, Annapolis, Maryland Hobby Items for Sale Airplanes and Rockets Hero Graphic

Plastic Scale Model Kits - Airplanes and Rockets
Academy of Model Aeronautics (AMA) Plans Service - Airplanes and Rockets

Great Planes Nylon Control Horn Flaw

Great Planes medium control horn manufacturing flaw - Kirt Blattenberger

I have written to Great Planes about what I believe is a manufacturing flaw in their medium size nylon control horns, but get no response from them other than to mail the parts to them. I believe the backing plate has a mirror image molding such that in order for the plate to be aligned properly with the main control horn holes, the plate would have to be installed upside-down. That places the reinforcement bumps down into the control surface, which deforms the surface. The pictures to the left should make clear what I am talking about.

Great Planes medium control horn manufacturing flaw - Kirt BlattenbergerThe control horn on the left in both the upper and lower images has the backing plate installed with the reinforcement bumps facing away from the control surface - the proper method. However, this forces the backing plate to be skewed in alignment relative to the main control horn part. The control horn to the right in the upper and lower images show that the only way to obtain proper alignment is to install the backing plate with the reinforcement bumps facing into the control surface. Doing so crushes the surface, and if the balsa is very hard or plywood is in the control horn mounting area, the backing plate ends up sitting on the bumps. This is clearly not the way it should be.

Other size GP control horns do not exhibit this problem. It is totally unbelievable that I first contacted them about three years ago and they still ship them like this. If you have seen the same thing and believe the parts are molded improperly, please send me an e-mail at the above address. I will collect the opinions and send them to Great Planes.

About Airplanes & Rockets 

Kirt Blattenberger, Webmaster - Airplanes and RocketsKirt Blattenberger

Carpe Diem! (Seize the Day!)

Even during the busiest times of my life I have endeavored to maintain some form of model building activity. This site has been created to help me chronicle my journey through a lifelong involvement in model aviation, which all began in Mayo, MD ...

Copyright  1996 - 2026
All trademarks, copyrights, patents, and other rights of ownership to images and text used on the Airplanes and Rockets website are hereby acknowledged.

Homepage Archives  |  Modeling News Archives


Kirt Blattenberger


Family Websites:

RF Cafe

Equine Kingdom

Rocket Kits + Accessories - Airplanes and Rockets

Model Aircraft Museum, AMA - Airplanes and Rockets

Academy of Model Aeronautics (AMA) - Airplanes and Rockets

Academy of Model Aeronautics

Tower Hobbies logo - Airplanes and Rockets

Tower Hobbies

Horizon Hobby logo - Airplanes and Rockets

Horizon Hobby

Sig Manufacturing - Airplanes and Rockets

Sig Mfg

Brodak Manufacturing - Airplanes and Rockets

Brodak Mfg