Engine Test Stand questions
 

I built a stand to test my engine with, pictures below. No, I'm not going to test it on my desk:) I plan on screwing it down to the airplane test stand at the field tomorrow.

Does everything look okay? I haven't yet cut and connected the fuel and pressure lines because I had another question.

What is the fuel nipple for on the bottom of the crank, the one I have an arrow to in the picture?

Thanks

RE: Engine Test Stand questions
 

Yes that will work fine. I do the same drywall screwing to the tables at the field.

The hose fitting is a crankcase breather you don't need to put anything on it or perhaps a short hose to lead drips outside the airplane.

John

RE: Engine Test Stand questions
 

I used that exact setup to break in my newest Saito 100. It worked fine, although that knotty pine is quite soft and you will have to pay attention to the tightness of your mounting screws.

That nipple on the crankcase is just a vent. Leave it as is, or you can put a short piece of fuel tubing on it to direct the oil spray away from your plane once you do the permanent install.

RE: Engine Test Stand questions
 

Jim

The nipple you speak of is not a fuel nipple . It is a vent for your crankcase. It allows air to go in and come out when the piston goes up and down. Some times lub oil will come out this nipple. It is shaped like a fuel nipple as fellows generally use fuel line to lead this excess oil outside of the cowl, or engine compartment.
One thing that concerns me about your pictures is your choice of prop. I can't be certain, but the hub on that prop looks a lot smaller than the drive washer on your engine, almost like it could be a prop for an electric motor. I would make sure that it isn't an electric prop as they are not designed to withstand the power that a glow engine can exert, and might fly apart.

Lm

RE: Engine Test Stand questions
 

Yes that will work fine. I do the same drywall screwing to the tables at the field.

The hose fitting is a crankcase breather you don't need to put anything on it or perhaps a short hose to lead drips outside the airplane.

John


Here are are three of mine that have had a lot of good service over the years:

RE: Engine Test Stand questions
 

Just for you Jim, I went out and took A couple of photos. First photo is A 1.20 III pumper. The rocker arm cover is the old type, I had to replace it, the cover next to it is the newer type, I had to cut slots in the screw heads to remove it and I had to hit it with A cutting wheel. The next shot is the newer pumper on the right and an old one on the left. NBotice the difference in the pumps, the newer pump and regulator are black plastic and the old pump is metal. If someone offers you A deal on one like on the left just smile and say no thank you, you can't get parts for the pump, I use it for parts, that's where I got the rocker cover. Just for grins I set an OS .91 next to the 1.20, just A slight difference in size. ;)

RE: Engine Test Stand questions
 

Pretty good setup, why do people prefer to use a stand though? I just installed my new 55 ax in my extra and broke it in on the plane.

RE: Engine Test Stand questions
 

I would go with a harder wood such as maple or oak. I once tried plywood and it did'nt make it thru 1 tank.:eek::eek:

That does look like an electric prop.[:o][:o]

Brett,
I always find it better to break in on a stand, with all the oil flying around, no sense in messing up your nice plane during the break-in.

RE: Engine Test Stand questions
 

Well, I used the test stand today and it worked great! The engine ran like new.

RE: Engine Test Stand questions
 

Great, a test stand is absolutely the best way to learn a new engine.

John