HP Heyford exhaust manifold

I am building the Handley Page Heyford kit. The exhaust stacks are strange! Unlike almost all other planes I have seen, the individual
exhaust stacks on this plane point FORWARD! Why did they do that? The engine is apparently the RR Kestral.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
Add image file

Polytechforum.com is a website by engineers for engineers. It is not affiliated with any of manufacturers or vendors discussed here. All logos and trade names are the property of their respective owners.