These plane's come with a 3 bladed prop, I read somewhere that you can put on a two bladed prop on.
My problem is the 2 bladed spinner's don't fit. I tried a 2" and a 2 1/2" spinner. The back plate does not match up. I have been trying Du-bro spinners.
Has anybody used a 2 bladed prop on these and if so how?

I know 2 bladed props can be used but not sure what type spinner. Probably 2 3/4" since your engine is a .61

Actually it is a .46

I'm not quite sure what you mean by the back-plate not matching up. Can you describe it a bit more, or post a pic?

They should work fine. WHAT doesn't line up with what? The nice the about the 3-blade is that idle it gave a little more braking power which would make it easier to drop into a short landing area but a 2-blade should be doable. [sm=confused.gif]

If you go to Hangar 9's website, you will find the adapter you are looking for. You may be able to find it at a Local Hobby Shop, if they carry Hangar 9 accesories. I have one, and when you use it, and get the right prop, you can expect to see noticeable difference in speed. I am currently repairing an Alpha that I modified last year. My son in law put it in, and the wing and fuselage got disenchanted with being together. I am retraining them to work together again, will be a taildragger once more. I was using an 11x5 prop, seems to get on quite well with that.

I was just about to post a picture but you answered my question for me, thanks.
I think I'll wait a bit before I try a 2 bladed prop if it is that much faster.

I use a 2 blade prop (11x6 - or is it a 10x6 ... I don't remember!) and a spinner that I got at the LHS. You have to replace the original backplate with the one that comes with the new spinner.

The throttle is on the left stick.......

It seemed like I was going 100 mph on my first flight!

Oh, you were in slow flight?

Were you trying to use the new spinner cone with the old backing plate? Use the backplate that comes with the spinner. If using the Dubrp, you will have to select the little "donut" bushing that allows for different size prop shafts.

Bruce, the problem is that the surfaces are not sitting flush.
Here is a pic.
The first thing is I don't know what it is calledIt is the first piece that sits on the engine. The second is the old plate and the other two are new 2 and 2 1/2" plates.
The diameter of the I don't know what it is called is greater than the diameter of the bolt pattern on the new plates causing only the nuts two make contact with the I don't know what it is called.
When I tighten the prop it deforms the plate because it is not flush.

Jeez! It's hard to explain stuff when you don't know the technical jargon.

It's a flywheel! But I am not having any luck finding an adapter though.

OK, the first thingy is the flywheel. It is what allows your engine to idle so nice and slow and smooooothe. Best to leave it on. You could always fly without the front half of the spinner (or no spinner parts at all for that matter) if you want to use the 2 blade props. The other 2 backing plates are definitely 2 blades units as you already know.

So the spinner and blade unit is cosmetic?
I was wondering if you needed these to fly.

Assuming the prop shaft is long enough, you could put a large washer with a 1/4" I.D. and an O.D to fit close in on the new backplate to act as a spacer. Shouldn't cause any problems. Be sure to get everything good and tight. I believe I recall that you were a machinist or metal worker so you know of what I speak.

95% cosmetic, gives you a good surface for an electric starter. Gotta admit, they are purrtee..

Lots of people out there have NEVER bought a spinner.

After continual problems getting spinners to fit and keeping track of back plates, spacers, and so on, I just decided to go with an aluminum prop nut.

http://www2.towerhobbies.com/cgi-bin...&I=LXE158&P=ML

You can use the flywheel if you like, but the prop nut of the right thread size, 1/4 - 28 thread, will fit any engine with the 1/4 - 28 thread. They even come in brass to add weight in the nose if you need it.

I like the looks of that prop nut. It looks like it would hold up better than the spinner anyway.

Go with a different spinner. Most of dubro's spinners have the ridge around the back--this will not work as it will not allow the backplate to mate up to the flywheel properly. You need one that doesn't have a ridge around it (just the knurling). You can find a spinner easily for this engine. I can't remember which kind I used, but it was on the same engine--in fact, I still run that same engine with a two blade prop. You need a spinner for a couple of reasons--it makes starting with an electric starter easier, it can help in safety if the prop nut loosens (not always, but it can help), and it helps direct and smooth out air into the prop blade, and away from the root of the prop. You will notice three things when yoy go from three to two blades--first, the acceleration down the runway will be incredibly stronger--just ease into it, don't "punch it" the first few times--it may get away from you. Second, much higher flight speeds, and third, it won't slow down for landings as nice--you'll need longer glide-slope. Makes for a whole new dimension of flying! I'd stay with the three bladers for a few flights, then change. At least until you've landed successfully!

What is the nut gonna hold up bettr to? Tree impacts??? HEHE

These are flat on the back, pick size and color:

http://www2.towerhobbies.com/cgi-bin...?&I=LXA411&P=7
http://www2.towerhobbies.com/cgi-bin...?&I=LXBMY5&P=7

Try 1 if you like or go with the nut or the 3-blade. Again, make sure you get things tight.

If it were me, I'd stay with the 3 blade a bit longer but it is your choice in the long run.

I HIGHLY don't reccomend dubro spinners. I bought one and it has 4 pegs that "hold it together better". they havent done a thing yet. They all broke the first day.

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Prop Driver:TPS [EVO100219]
by EVOLUTION ENGINES in Replacement Engine Parts: Air/Heli

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Here for the manual, shows the parts placement..

http://www.horizonhobby.com/Shop/ByC...ProdID=EVOE100

You're gonna need a new 2 blade spinner. The flywheel messes up the backplate a bit, but mine works fine. I have the XE2 with the same engine you have. When you tighten down the prop. nut it will warp the backplate a tad, but just screw the spinner on, get both sides tight, and straight, and you should be fine. I have a 10X7 MAS prop. on mine, and my friend has an 11X5 APC on his H9 Alpha. His plane is FAST with the 11X5, so I wouldn't reccommend it with yours just yet. Marc. slipped with the electric starter the night I got my plane, and broke the 3 blade prop, so I started out with a 2 blader. No problems for me. Good luck!

The part Bingo listed would be used instead of the flywheel. You would lose a little of the smoothness but it should be acceptable.