News:


  • November 25, 2020, 03:22:31 AM

Login with username, password and session length

Author Topic: Design Basics  (Read 119 times)

Offline John Miller

  • Moderator
  • Trade Count: (0)
  • Admiral
  • *****
  • Posts: 1650
Design Basics
« on: November 08, 2020, 01:34:46 PM »
Figuring Control ratios:

Let's assume that most bellcranks rotate 45 Degrees in each direction. If we want 45 degrees of flap, the ratio is easy, 1 to 1, but what if you want 30 degrees of flap rotation?

Using simple Algebra we can solve these types of questions.

In this type of problem, we will have 3 out of 4 variables. Usually, these fixed values will be the bellcrank rotation, the flap horn length, and the flap rotation we want. The number we're missing is the bellcrank moment arm.

The 4 attachments are PDF's and are sized for a standard sheet of paper. You can download and print them with your printer if you desire.

Getting a line on life. AMA 1601


Advertise Here

Offline Avaiojet

  • 2020 supporter
  • Trade Count: (0)
  • Admiral
  • *
  • Posts: 7330
Re: Design Basics
« Reply #1 on: November 09, 2020, 05:16:43 AM »
Figuring Control ratios:

Let's assume that most bellcranks rotate 45 Degrees in each direction. If we want 45 degrees of flap, the ratio is easy, 1 to 1, but what if you want 30 degrees of flap rotation?

Using simple Algebra we can solve these types of questions.

In this type of problem, we will have 3 out of 4 variables. Usually, these fixed values will be the bellcrank rotation, the flap horn length, and the flap rotation we want. The number we're missing is the bellcrank moment arm.

The 4 attachments are PDF's and are sized for a standard sheet of paper. You can download and print them with your printer if you desire.

You can also do this with a motion diagram.
Trump Derangement Syndrome. TDS. 
Avaiojet Derangement Syndrome. ADS
 Please visit my updated Website! www.cfcgraphics.com  If you're Trolled, you know you're doing something right.  Alpha Mike Foxtrot.  Owner of CFC Graphics. "Model Airplane Graphics from a Model Airplane Builder."  "No one has ever made a difference by being like everyone else."  Marcus Cordeiro, The "Mark of Excellence," you will not be forgotten.  I look at the Forum as a place to contribute and make friends, some view it as a Realm where they could be King.  "Ya gotta love it when a plane comes together."  Proverb 11.9  "With his mouth the Godless destroys his neighbor..."  "Perhaps the greatest challenge in modeling is to build a competitive control line stunter that looks like a real airplane." David McCellan, 1980.


Advertise Here
Tags: