Crankshaft Threads: 1/4 x 28

Is the 1/4 the size bit I need for boring out the prop in order for it to fit on the shaft? What I need is the size bit to use for fitting a 2-blade prop on the Evo .46 Training system. Getting rid of the 3-blade prop.

if its a .46 you shouldnt need to bore the prop, should fit straight on there aslong as its designed for that size engine

I bought the 2-blade prop from my LHS guy who is also my instructor and he knows what planes I have. He recommended I go to a 2-blade prop for my Arrow. The ones he sold me do not fit onto the shaft all the way. The hole is too small. I believe the prop is a 10x6 but not 100% positive. He said to bore it out.

Showtime,
Unfortunately Foamy is a bit off here. Props aren't designed for a specific sized engine, I've had to ream out many props in order to get them on a .46 engine. It's just part of being in the hobby. What you need is a prop reamer to ream out the hole. You can use a drill if you don't have one, but if you aren't careful when you do it you can get the hole off centered and wind up with a prop that is useless. By using a reamer you will keep the hole centered on the prop. This is what you need [link=http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXK248&P=ML]Great Planes 4 step prop reamer[/link] . It has 4 different cutting sizes on it and will ream out to fit quite a few of the engines on the market today.

When you ream out the prop you want to turn the reamer in just one direction, which will be clockwise. This is because this is the direction the cutting teeth are oriented. Even when you are removing the reamer you will still turn it the same direction as you remove it. Simply insert the reamer into the prop hole and turn it until it cuts to the next "step" on the reamer, and then check to see if it fits on the prop shaft. Continue doing this until you open the hole up enough to slip it on the prop shaft

Don't worry about having to do this as it's actually quite common to have to do this.

Hope this helps


Ken

Thanks RCKen.
I'am going to meet my instructor at his shop later and I'll see if he sells a reamer. Otherwise I'll order that one you mentioned.
I know I need a prop balancer as well, oh and a COG machine, and some fuel lines, oh and a couple glow plugs, some more epoxy... Damn, I am broke.

Welcome to the addiction!!!!

Ken

LOL Showtime , use your fingers for a CG machine, Save ya some cash for now.
Welcome back, be sure when you get the prop reamer , you get the standard and not the metric.

A note of caution. If the prop won't fit the 1/4" shaft, make sure its not an electric prop. This happened to my brother. He's just getting started, and the hobby shop sold him an 11x5 apc prop, but it was for an electric.

Brad

They also make a metric reamer that you will need for some engines in the future. No need to buy it now, just making you aware.
http://www2.towerhobbies.com/cgi-bin...&I=LXEGH6&P=ML

10x6 is on the small size for the Evo engive but will work.
The Evo manual http://www.horizonhobby.com/ProdInfo...nualUpdate.pdf on pg 5 calls for an 11x6 prop.

It may be an 11x6, not sure. I have had to take in so much information in the past few weeks as I have prepared for my first training sessions and some details like that have escaped me. Hopefully I can count on my instructor selling me the right stuff.

Tonight I will be taking my two newly built planes to his shop to get inspected and have the throws set. If all looks good he will maiden my trainer and hopefully I can get some stick time. These things have been sitting at my house just begging to be flown. The hard part is that I live in the country and I have my own airstrip. Boy, I have had to use restraint to keep myself from flying them.