Hobbsy

My Feedback: (102)

Stall, check out these Graupners at Hobby-Lobby, they come in some tweener sizes that others don't have. Don't opt for the 12.5x7 though, it has wider blades than the 12x8 and turns a good 1,000 rpm less than the 12x8 on my Fox .74 Diesel. The greatest selection of 3 bladers is at Zinger, Joe will make it up for you the day you call and get it to you surprisingly quickly. Just some other options.

http://www.hobby-lobby.com/grprop.htm

http://www.zingerpropeller.com/3_bladed_Propeller.htm

NM2K

My Feedback: (14)

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How a particular type of prop performs is largely based upon your expectations, as long as it is enough load for the engine, or not too much load for the engine.

I once designed and built a control line model that resembled the British Vampire early jet fighter. I did it up in Navy dark blue, made it sit with the nose slightly elevated (tricycle landing gear) and had a nice spinner on the nose making it look sleek. All it needed was a three bladed prop to make it look really hot. The model flew well with a standard two blade 10x6. I bought a 9x6 three bladed prop for it. I forget the brand, but it was not wood. The model flew great with the two bladed 10x6, but took nearly a complete lap running on the ground before it would takeoff. I was underwhelmed with that prop's lack of performance. That's just one model and one prop, but the memory has stayed with me over the years.

I did buy some modern three bladed props a few years ago. Haven't flown them yet, but hope to some day.

So, the moral of the story is to buy a three bladed prop at least one diameter smaller than a traditional two bladed prop sized for your engine and give it a try for yourself. The only ones who knows whether you will be satisfied is you, but trying it. Good luck.


Ed Cregger

w8ye

My Feedback: (16)

Ed,

Good advice

blw

My Feedback: (3)

Less vibration, smoother pitch control, and braking action on downlines should be noticed with the right 3 bladed prop.

Spinners? That's the problem.

pilomeza

Hi, I got the Perry Pump oscillating model for a Saito 82, it has to nipples: According the instructions one goes to the fuel tank, and the other goes to the carburator. Do I have to connect the muffler to the fuel tank?

Thanks four your advise.

Happy Landings.

w8ye

My Feedback: (16)

No the nipple on the muffler is left open,

The line on the tank that normally goes to the muffler is left open to the atmosphere

stallwart

Many thanks Hobbsye, Ed and W8ye. I considered Graupner, but hadn't even thought of Zinger. I'll be checkin' it out!

Ed, I have a trike gear H-9 T-34 that sits on the ground with a nose down attitude. The negative incidence makes for a longer takeoff run, but once up to speed it's in air easily. In the air it screams with a Saito 82 and MA 12x8-3.

pilomeza

Thanks, The only thing is that I'm curious is if the fuel won't drain from the breather in the tank during inverted flight.? Or should I put a check valve?

Thanks again, and

Happy Landings.

w8ye

My Feedback: (16)

It will not drain do not worry about it.

You can have the vent got out the bottom of the plane. And inside the tank it goes to the top of the tank. If you are right side up or upside down one end is always above the fuel level.

boogermancan

i thought the same thing on my twist 60 with saito 125 my hose just stick out to the side so i know when the tank is full the oscillating Perry Pump works so nice when you do hard sharp turns no more lean spots from to many G's

Rudolph Hart

Hi guys,i'll ask again in a different if that's better.My question is to hobbsy as the mods remain silent.DO flex pipes cost you a significant amount of performance??

All fourstroke superbike engines i owned and raced years back had tuned pipes.My question again is do you think lightweight high performance fourstroke engines can defy this rule of basic engine tuning and be happy with a crinkly old flex pipe(as the handbrake describes it)

mike early

Does anyone use the Perry VP-30 Pressure Pump?

Hobbsy

My Feedback: (102)

Well OF, if you could throw a little respect my may I could do a quicky comparo between the wiggly pipe and the new cast muffler on some Saito. Whichever the pipe would fit. I'm currently working with Kens .72 and have it pretty well ironed out.

sodbuster 1

spinners aren't a problem nowadays.
there's Dave Brown, Tru Turn, Maxx Products etc. All good products.
between the three of them no matter what the application is you can get a spinner to fit
with DB and TT if by some miracle they don't have one to fit, they'll custom cut.
the cheaper alternative is Maxx from which you can always get a solid and cut it yourself

cloudniner

My Feedback: (87)

Hello all.

One picture is one of my favorite models named Cloudniner. It was designed by Bill Winter and was in RCM as number of years ago. It is powered with a Saito 91 which is a perfect match for the model.

The Fokker Dr.1 is from a Flair kit and it is powered with a Saito 182 twin. A little over powered but it sure sounds a whole lot better than the G23 that it started with.

I just purchased a Saito 130 twin that except for the bearings looks little used. The bearings were in bad shape (rust).

I need two things if someone can help me out.

Can someone point me to a site that can explain how to put it back together. I marked the cam positions but just want to make sure.

The other thing is what the heck does the air pump do. It appears to just put air into the crankcase.

Thanks


Cloudniner

w8ye

My Feedback: (16)

The air pump just puts air in the crankcase

Here's the current twin manual

http://www.horizonhobby.com/ProdInfo...oke_Manual.pdf

You may need some help on the cam timing. Compare the "feel" of your 130 with that of your 182 when you are done to see if you got the timing correct

Hobbsy

My Feedback: (102)

The plumbing is like this if I've gotten the correct picture.

cloudniner

My Feedback: (87)

Thanks for the feedback. The manual describes the alignment of the cam gears so should not be a problem putting it back together.

I don't understand why there is a need to pump air into the crankcase.

Thanks again.


Cloudniner

w8ye

My Feedback: (16)

There is no differential pressure in the crankcase because as one piston is coming down the other is going up

Your 182 is just the current version of your 130. It has no pump. So you can get by without a pump

Rudolph Hart

All respect brother..you mean to say you have not done that previously??

72

well I guess I should join the club now that I am an official Saito owner. I have been reading this thread for the last week or two,, but it will take a while to get through 500+ pages. A month ago I didn't own any 4-strokes and now I have a Saito 100, a 100GK and a 115GK. Both GK's and brand new and the 100 is only 3 gallons old. It must be a sickness or something, but man are these nice engines. I couldn't help myself.

Rudolph Hart

Welcome 72,your heart rate must be someting to see

mike109

G'day 72 My old 72 turned up here today. A new friend wanted a trainer and he talked me out of my Boomerang 60 and my Saito 72. Sadly he tried to fly it without help and the result was predictable. The plane is toast but the engine looks fine and will fight another day once I clean the dirt out.

I now have examples of all the current Saitos from 30 to 120 (except the 50, the 72 and the 115) and I love them. They are easy to handle, make good power for their weights, are reasonable economical to run and just sound wonderful. I also have a 90R3 which while not the most powerful engine in its size, does sound amazing and really looks the part in my Hanger 9 Sopwith Camel.

Welcome the the world of the Saito.

Hobbsy

My Feedback: (102)

No sir I haven't, but I'm not the one who claimed they reduce rpm and power. My referrence to the power increase when using a TurboHeader was in comparison to the stock exhausts whether cast or older long ones. As you can see I'm all set up to do it. The engine is my older Saito .56 from around 1995 which spent most of its adult life hauling a H9 Cherokee 40 around the sky. I always referred to the Cherokee as a flying brick because it was heavy for its size. The prop on the .56 was always a MA 3 blade 12x6 which it turned at 8,800.

mike early

Has anyone in the past used the Perry VP-30 Pressure Pump? I realize it isn't ideal. But I have one. I don't need one....but I have one.