Cox Engines Forum
You are not logged in! Please login or register! Guests are limited to posting in the "General Questions (Guest Posting Allowed)" section only. Becoming a member is fast, easy and FREE!


Log in

I forgot my password

Search
 
 

Display results as :
 


Rechercher Advanced Search

Cox Engine of The Month
September-2018
Davenz13's

"Cox Special MKII .15"



PAST WINNERS
Speed Contest 2018
CEF Traveling Engine

Win This Engine!
The Traveling Prop
Gallery


World of Aviation

S2. Or the gf series

Go down

S2. Or the gf series

Post  oldguy on Tue Jul 10, 2018 11:24 am

What is your choice from mas props for our smaller size glow engines up to say the .15 size engines.
avatar
oldguy
Gold Member
Gold Member

Posts : 225
Join date : 2015-12-10
Age : 64
Location : arizona

View user profile

Back to top Go down

Re: S2. Or the gf series

Post  Ken Cook on Tue Jul 10, 2018 3:32 pm

The GF series has changed multiple times over the past years. I prefer the older wide blades for iron piston .15's. The new GF series work well on the LA/FP.15's. I use 7x4's. I do find them to work well on the Fox BB .15 in the 7x4 range. I find 7x6 props load the engine too much. If I find the need to use 7x6's on my .15's I take them and round off the tips shortening the diameter and making the prop more efficient. I scrape the prop to thin it as well and this has worked fiarly well on my Clown racers.
On smaller engines such as Cox, I cut the 6x3's down to 5". They make a 6 x 3.5 which I use on the Norvel .074. Most places carry the MA props. I find them to be typically out of balance but they're cost makes up the difference. We fly at a field at certain times of the year that usually breaks the props on landings. I find them to be problematic at times on Mccoy redheads because the prop driver doesn't initially seat on the back of the prop due to the bumps on the driver. It usually takes repeated tightening until it seats.
avatar
Ken Cook
Top Poster
Top Poster

Posts : 3190
Join date : 2012-03-27
Location : pennsylvania

View user profile

Back to top Go down

Back to top

- Similar topics

 
Permissions in this forum:
You cannot reply to topics in this forum