Jump to content

Recommended Posts

2" between a cruise and climb prop is quite small. I suppose it might vary with the difference in speed between cruise and climb too.

Share this post


Link to post
Share on other sites
12 hours ago, Kent Ashton said:

I have kept track of prop sizes as people discuss them and you won't find very many specified at 81.7" pitch.

Ha!  Thanks for the interesting read.  If I ever get brave enough to build a prop I will definitely be referring to your work.

Share this post


Link to post
Share on other sites

A newbie friend of mine was surprised to learn you could use auto plugs in an airplane!  And with magnetos!  (He is paying 32 Euros per plug).  I gave up magnetos a long time ago but G3i sells the instructions for how to modify the mag caps for 8.5mm auto wires.  http://www.g3ignition.com/magmod.html

Here is a Van's discussion with pictures of the process.   http://www.vansairforce.com/community/showthread.php?t=143892

I have used 18mm Autolite 386, Bosch M8ACO and a Champion version without inserts but mostly I used 14mm NGK BR9ES in 18mm inserts.  Frankly, I can't recall why I started with the NGKs+inserts; I probably read that Klaus uses them.  🙂  The 14mms and the 18mms seem to act the same in the engine.  I have never run a controlled test.  However, I was comparing the two plugs (pic- an old NGK and a new Autolite).  The 18mm Autolite seems to have a long electrode compared to the NGK.  Ordinarily a plug with a longer electrode is slower to conduct heat away and is a hotter plug due to the longer heat path--but both types seem to run at about the same electrode color.  

IMG_1070.jpg

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

×