PPRuNe Forums - View Single Post - High-Wings and t/o perf
View Single Post
Old 1st Apr 2015, 20:51
  #1 (permalink)  
byeplane
 
Join Date: Apr 2014
Location: UK
Posts: 20
Likes: 0
Received 0 Likes on 0 Posts
High-Wings and t/o perf

The basics seem to be eluding me again.

I was looking at the Bae146 and wondering why its designers chose to use a high-wing turbofan configuration.

Were turbofans used because the 146 was intended to be capable of longer routes than its regional turboprop competitors (I noticed it has a 31000ft service ceiling compared to 25 and 24k respectively for the ATR and Dash 8)?

In relation to the high wing config I seem to remember that this gives better results on short field t/o's and steep approaches I.e. London City. However I cannot find much technical info to help explain this.

I do understand that the combo of high and swept wings make the ac extremely stabld about the longitudinal axis hence the need for wing anhedral.
And the incorporation of swept wings is beneficial in reducing drag resulting from relatively higher cruise speeds than a turbo prop.

Can someone help me fill in the blanks?

thanks!
byeplane is offline