Stuff You Should Love: Prop Savers

If you’re flying like me, you’re probably replacing propellers and bending motor shafts like there’s no tomorrow. This is especially true if you’re flying from a grass field. The problem is that when your propeller hits the ground, either it takes the force of the impact or, if it’s still turning with throttle, it can bend the motor shaft.

Early on when I started flying RC I kept hearing about prop savers. I didn’t really get the benefit until I used one myself. Now I use a prop saver on every 3 or 4 mm motor shaft! I’d love to say I have no more broken props or bent shafts but all I can say is that it has drastically reduced prop fatalities and shaft replacements.

Here’s how a prop saver works

It’s a small aluminum ring that fits on the motor shaft like on Figure 1. It has two milled, threaded holes where little screws go and it comes with one or two rubber bands (you only need one).

Figure 1: Prop saver installed on a motor. Notice the rubber band holding the propeller on.

After putting the prop saver on the shaft you tighten the screws so that it doesn’t spin free from the shaft or slide off the shaft. You then put the propeller onto the front of the prop saver and attach the rubber band from one screw, around the front of the propeller and onto the other screw.

Now your prop has some room to flex back-and-forth and spin free from the motor a little. So if you hit the ground, the rubber band takes the force a little instead of passing it to the prop or shaft.

Prop shafts are cheap! You can find one at a local hobby shop for about 3 or 4 bucks but you can buy a pack of ten (3mm) online for less than three dollars! (or 4mm for less than four)


They come in all shapes and sizes but all do the same function: save props… and shafts.



One Week of Super Cub Modifications

Spent a week doing little things here-and-there to the SC and ended up with a very different model :) I’m happy because I did a lot of stuff I had been meaning to do to it for a long time.

I only have pictures (and crappy ones!) because I lost my digital camera so I had to use my mobil phone.

The first thing I did was put flaps on. I used these hinges I had bought from HobbyKing like a year ago and didn’t know what to do with them because they sucked as “hatch hinges” like they had been advertised. I like them for flaps because I can make a single cut instead of having to bevel the edge of the flaps, thus keeping the wing totally free of indentations when the flaps are up.

Flaps up. You can barely tell they are there!

That was supposed to be IT. I just wanted to add flaps to the SC. I then thought “Hmm… I should put flapperons TOO!” so I did. I removed the Y-lead and installed two 200mm lead extensions on the servos to split the aileron channel in two. Then I mixed them together with two switches. So I can lower the flaps with or without the flapperons.

Flaps ONLY down
Flaps AND Flapperons down

I also mixed in down-elevator with the flaps and also on a switch to turn it on and off. You can see that in the two pictures above.

Now, my transforming Super Cub (hopefully) can slow down to a crawl.

But WAIT! There’s more! :D

I went up to the attic and found a few goodies in a bin! I found my old SC landing gear! I put those on, as you can see from those pics up there. I had been flying with the rear end of the floats set held on by screws!

I also found a brand new rudder in a pack that used to be a SC tail feathers kit. This rudder has a tail wheel on! AWESOME for me because I had cut off my old tail wheel when I was flying the SC with tricycle landing gear.

And something I had wanted to do for a long time: I counter-balanced the elevator and rudder, as found in many clipped wing cubs. I LOVE the look of that :)

Counter-balanced rudder and elevator

Of course I’m using the OrangeRx 6-ch receiver and taking up every single channel and every mix on the DX6i, including the gear mix, Mix 1 and Mix 2.

Every servo slot is used!

Actually I didn’t use the Flaps mix for reasons only known to me. lol. I can change it later if I feel I have to ;D

Top of the wing with flaps and flapperons down.

Step-by-step tutorials and videos on how to do all this will be coming soon. I just have to find my camera :(


June Update: New Radio and Plane(s) to Come

Just a quick update about what I’ve been up to the past few weeks:

    • I bought a DX6i and am loving it. The HK T6a will go to a new flyer.
    • Got a few OrangeRx 6-channel receivers (pictured) for the new DSM2 radio. Will report on those later.
    • I’ve also started and finished construction on a new flying wing (pictured) made from foamboard. Flight video within a week or so.

More reviews of HobbyKing stuff coming, also some instructional videos on programming for best results and DX6i stuff, I’d like to concentrate on instructional videos more and start building with bluecor foam so watch for that.

Remember to subscribe to get all the updates and new posts as soon as they’re published and follow me on Twitter and Subscribe on YouTube.


New Forums to Take-on Discussions

I’ve added a simple forum to help us discuss issues that may arise from topics written on the site. It’s nothing fancy and not intended to compete with the big guys. Its main roles will be to offer personalized help to my readers and to establish a stronger connection to my fellow Floridian RC hobbyists.

Please, feel free to introduce yourself and talk about whatever you’d like. If you’ve been meaning to ask me something but didn’t find the right medium to do so before, maybe it’s time you do so. I’ll stay on top of it and answer all questions quickly.

Please not that in order to post anything on the Forums you must be registered on the site, so if you haven’t done that yet, go ahead and sign up.