SrTelemaster150

According to HH's site, the FG-30 takes the same 14 mm FA-120 based exhaust pipe as the FA-120-150-180. (SAI120S75A)

This is nothing new.

RC Specialties

SrT,

You are correct. HH does show the FG-30B uses the 14x1 header pipe and nuts used on the engines you mentioned. I believe this to be in error. I spoke with HH support and they verified what is shown to be correct. I plan to call them again today. Liem's measurement indicates a 15x1mm exhaust. Which seems odd given it is a 180 size engine.

Jim

Hobbsy

My Feedback: (102)

Jim, maybe he has a 2.20 and doesn't realize it.

RC Specialties

Dave, Liem sent me a short video and the engine had the FG-30 markings on the side. I did find a list of four stroke prop shaft and exhaust sizes and it shows a 15x1mm thread for the FG-30. We will see what HH says.

Jim

Captcrunch44

Sr
so can we base the power out put on the new FG 90 cc on the 84 cc adding say 10 percent. I am just trying to wrap my head around the power. And a radial engine has better torque then an opposed engine?

Hobbsy

My Feedback: (102)

You guys need to quit this, you keep makin me look at the FG 11.

Rudolph Hart

That will be a step up from the 125

FlyerInOKC

My Feedback: (6)

They are a cruel lot aren't they Dave?

acdii

HA HA!! Nothing wrong with the FG-11 other than lack of grunt. It will fly a long long time on a few ounces of fuel though.

Stop picking on the 125, mine works great, though it does like the alky, kind a like old farts do.

SrTelemaster150

The FG-90R3 has a better intake plenum design & it will be much more efficient than a stock FG-84R3. The FG-84R3s that have the Ray Engish modifications would be a better benchmark to work from. The power increase over the stock FG-84R3 was over 35%.

If you want to estimate the outputof the FG-90R3, look at the various Ray English modified FG-84R3s & add about 6%.

https://www.youtube.com/watch?v=ffUehgpp8Ug NOTE: The intake modification as shown was a "red herring" in case Saito tried to steal the design. (they did)

Saito has since licensed Ray's intake design.

p3arljam

My Feedback: (5)

Can anyone tell me the best way to get after run oil into the breather nipple on a Saito 82?

acdii

get a tiny container, like one of those medicine measuring cups, put some oil in it, then stick a fuel line on that nipple, and the other end in the cup and spin it with a starter. You should see oil move in and out of the tube. Start with the piston at BDC so it draws some in quicker. If you have an aerosol can of oil then stick the nozzle tube in the fuel line, and at BDC squirt some in, spin it with the starter and repeat a few times.

p3arljam

My Feedback: (5)

Thank you sir.

SrTelemaster150

I CA'd a brass tube over the plastic straw that came with this & that adapts to a piece of fuel line that will fit over the breather nipple. Rotate the propeller to place the piston at the bottom of the exhaust stroke & you will see the fog pressure turn the prop as it forces the piston to the top. When you see bubbles around the pushrod cover rubber, you know that the crankcase is well lubed..

p3arljam

My Feedback: (5)

I just thought of something and i know the answer is probably obvious but i am missing something. I fly all my saitos with a piece of fuel tubing coming off the breather nipple out the bottom of the cowl to to allow for a less messy cleanup while flying. If i am trying to add oil thru that same nipple and spinning the prop wont it be pushing the oil out like it does while i am flying?

blw

My Feedback: (3)

acdii- are you saying the Saito 72 doesn't run well with castor? Not sure of what you are saying here.

As for how the SSE flies, remember how short coupled the model is. Mine may knife edge and I'm going to find out when I fly it again, but that's because it was built with fairly large counter balances. That may be enough.

I used SSEs as trainers teaching students to fly (on low rates). It is what they call an honest design. The only plane more prone to good hacking and modding is the Sig 4 Star, imo.

I have a basket case model that is just bones built by someone else and given to me. I'm thinking of lengthening the fuselage at least 3 inches for a Saito 72.

Charley

My Feedback: (2)

I suppose it's the difference between the crankcase pressures when the engine is running versus when it's flipped or spun with the starter. There's no combustion blowby past the rings to affect the crankcase pressure if the engine is just turned over. True, there is air in the crankcase displaced by the piston going up and down in any event but not as much without the blowby. Personally, I like to invert the engine somehow while injecting after-run oil into a 4-stroke crankcase. That way, only air gets blown back out the breather nipple when the engine is turned over.

CR

blw

My Feedback: (3)

Grand Marnier may have some if that's what you are looking for.

acdii

None of my Saitos run well on Castor based fuel. They smoke heavily and burble at WOT, and no amount of tuning will get them to run well. I switch back to Wildcat and they run great.

The stability and big wing is all that saved mine when the elevator servo died in the up position.

acdii

This is correct, you have positive pressure in the crankcase when the engine is running, but when you are just spinning it you are drawing the oil in and pushing air out, and spinning helps to wash the old fuel and crap out of the bearings while you spray the oil in.

SrTelemaster150

If you use a product in an aerosol can, you won't have to do the rotation thing as the pressure from the aerosol will force the ARO into the case. Having the piston at the bottom of the exhaust stroke allows the case volume to increase when the piston is forced upwards as the pressure is applied, thus allowing more product to enter the case.

Captcrunch44

Well here's my 2 cents worth. I just use a fuel syringe. Suck up some oil and squeeze it into the breather nipple.

acdii

I rotate it to help flush out the waste oil and contaminants. Helps get the good oil around the bearings where it is needed the most.

Rudolph Hart

Dead right and the prop turns on it's own as you squeeze the plunger.A couple of hand flicks to check all is good and hit it with a starter.You can get to the after run/flying beer fridge quicker.

alex24

Here is a short video of the clip of the Hangar 9 F4U Corsair 60cc with the Saito FG-84 3-Cylinder. Enjoy!

https://www.youtube.com/watch?v=7IK0Sk2Mv1I