Help with Cessna 128 engine

[phinkin]

Looking for any and all advice on the os max FP 40 for vintage lion model Cessna 128 I'm new and have never flown or worked on anything as small as this. If anyone could help me at least get the parts to help me get this running that be awesome. If I need better pictures let me know.

 

[Finesavageboy2]

I don't really know a lot of stuff about rc planes, but I'll try helping you. with my knowledge you need 4 things to get an engine going: Spark, fuel, air, and compression. now I'm not for sure if a rc airplane uses spark, so I'll cross that one out. one way to check compression is to take out the glow plug and put your thumb on the hole. then you turn it over, and if your thumb is getting pushed out of the hole, it has compression. if it doesn't, your piston rings are allowing the compressed air to sleep through the gaps and into the crank case. if you do all of this and everthing is good, now you put it back together, hook up a fuel system, maybe prime it?, and it show pop off. Again I don't know anything about this so were in the same boat here. If I say something wrong, more than likely someone here will correct me. Also I looked up those parts you need and I found that the best glow plug to run is a #8 os Glow plug. For an idle plug, those are only for four stroke engines from what I've looked up.

 

[Cheetah928]

Same kinda thing here, not a gas/nitro person, nor am I an RC plane person, but I know what you need for it to work. What I can tell you is that you probably want to update your electronics, especially if those have been sitting for years. On Amazon there is a company called feetec that makes good servos for a reasonable price, they come with the attachments needed to connect to your ailerons and elevators and whatnot. I do not know what you're running for battery, but they make NIMH packs designed to be in nitro cars/planes. For your radio system I would check out spektrum electronics, they're a leading brand in air electronics. Bit pricey, but they are good. For your engine, make sure you have compression, it isn't seized in any way, you get the right spark plug, and you have the right fuel flow. I am not quite sure how to help without knowing the problem, but I hope I'm a step closer to flying with your grandpa again!

 

[fstnd]

If you want to go cheap like me, get a Flysky i6 radio and ia6b receiver. Flysky is actually a decent brand. Don't cheap out on servos though, they are very likely to suddenly stop working; a problem in RC cars, but definetely not ideal in a plane. The #8 glowplug gets another vote from me. Try to use fuel with 5 to 16% methanol and around 13 to 18% oil.
Your engine either has no compression, so it won't start, or it has an air/fuel leak somewhere, which you can find out about by starting it. Just really make sure you're safe from the blade...
Those are the two problems I'd look out for.
To start the engine, prime it until fuel has reached the carburetor. Do this by blowing into the fuel hose attached to the exhaust. Close the intake with your finger and turn the engine 4 times. Attach the glowplug ignitor and turn the engine really quickly, either with a special engine rotator or simply with a piece of wood so your fingers are still not too much at risk...
Clear everything around the propellor. Those engines pull much harder then you expect.

 

[fstnd]

I just noticed that you don't have any fuel lines. Your fuel tank should have two fuel lines: one with a fuel filter sponge, and one that just ends. The fuel line that just ends is meant to go to your exhaust, because it acts as variable fuel pressure. The other fuel line, with the filter, is meant to go to the carburetor of your engine. From the inside, get those two lines and connect the fuel line to the blue circle (from the inside) and the pressure line to the yellow circle. Or the other way around, this is just to make it more followable.

On the outside of the plane, connect the "blue" Fuel line to the carburetor. Connect the "yellow" pressure line to the exhaust:

This is the arm of your carburetor, find out where this red rectangle indicated link goes. It should be connected to the servo arm of your servo that is connected to your throttle channel. Simply put, when you hit the throttle, this linkage should move and open your carburetor.

 

[phinkin]

Same kinda thing here, not a gas/nitro person, nor am I an RC plane person, but I know what you need for it to work. What I can tell you is that you probably want to update your electronics, especially if those have been sitting for years. On Amazon there is a company called feetec that makes good servos for a reasonable price, they come with the attachments needed to connect to your ailerons and elevators and whatnot. I do not know what you're running for battery, but they make NIMH packs designed to be in nitro cars/planes. For your radio system I would check out spektrum electronics, they're a leading brand in air electronics. Bit pricey, but they are good. For your engine, make sure you have compression, it isn't seized in any way, you get the right spark plug, and you have the right fuel flow. I am not quite sure how to help without knowing the problem, but I hope I'm a step closer to flying with your grandpa again!

The manual said 20/20 so that's what I got for it. It didn't really say much about the engine tho. Mostly on how to build the aircraft it was seized up but got it freed up and it does feel like I have compression I can get fuel to the carburetor and before I burned the glow plug up I almost or it felt like to me anyways that when I did get the glow plug lite the propeller locked with compression untill the plug burned out. I found a new os max fp 40 online but not sure if it's the right model as mine. Right now I'm stuck on firing it up till I get the right glow plug. I really appreciate your time and help. This is the only manual I got with it.

I just noticed that you don't have any fuel lines. Your fuel tank should have two fuel lines: one with a fuel filter sponge, and one that just ends. The fuel line that just ends is meant to go to your exhaust, because it acts as variable fuel pressure. The other fuel line, with the filter, is meant to go to the carburetor of your engine. From the inside, get those two lines and connect the fuel line to the blue circle (from the inside) and the pressure line to the yellow circle. Or the other way around, this is just to make it more followable. View attachment 252185
On the outside of the plane, connect the "blue" Fuel line to the carburetor. Connect the "yellow" pressure line to the exhaust:View attachment 252186
View attachment 252187
This is the arm of your carburetor, find out where this red rectangle indicated link goes. It should be connected to the servo arm of your servo that is connected to your throttle channel. Simply put, when you hit the throttle, this linkage should move and open your carburetor.

This is what I have the engine on now with fuel lines now in the parts I got I have stuff like this

 

[Cheetah928]

The manual said 20/20 so that's what I got for it. It didn't really say much about the engine tho. Mostly on how to build the aircraft it was seized up but got it freed up and it does feel like I have compression I can get fuel to the carburetor and before I burned the glow plug up I almost or it felt like to me anyways that when I did get the glow plug lite the propeller locked with compression untill the plug burned out. I found a new os max fp 40 online but not sure if it's the right model as mine. Right now I'm stuck on firing it up till I get the right glow plug. I really appreciate your time and help. This is the only manual I got with it.

Wait what's 20/20?

 

[YSRRider]

Didnt read all the comments. The FP is a budget line engine. Has no bearings on the crank shaft. First thing to do with any nitro motor thats been sitting for years is to inspect and clean it. On a bearing motor, the bearings are often rusted and need to be replaced but thankfully you dont have that issue here. I would take the engine apart, clean it, inspect everything and it should be good to go. make sure the fuel lines are hooked up correctly. Run airplane blend fuel or heli blend but thats kind of a waste of money. The FP motors are kind of collectable these days. Might be worth it to sell it to a collector and use a different motor or switch to electric.

 

[phinkin]

Didnt read all the comments. The FP is a budget line engine. Has no bearings on the crank shaft. First thing to do with any nitro motor thats been sitting for years is to inspect and clean it. On a bearing motor, the bearings are often rusted and need to be replaced but thankfully you dont have that issue here. I would take the engine apart, clean it, inspect everything and it should be good to go. make sure the fuel lines are hooked up correctly. Run airplane blend fuel or heli blend but thats kind of a waste of money. The FP motors are kind of collectable these days. Might be worth it to sell it to a collector and use a different motor or switch to electric.

Well I ended up having to get a plane build kit that was close to the one I got i couldn't find part due to them discontinued the model a few years back and stop making replacement parts. That and the older one I found out was a custom build kit verses the newer one I had to buy was commercial build kit. Whats in that kit is what there to make it fly no room for custom design. Now I did end up doing what you suggested and tore the FP apart thankfully I had the original engine box with a new muffler that had the parts list a step by step on how to tear it apart and and put it back together. Gave a few little tidbits on the glow plus and fuel and little things like that helped. It took a while of playing around with it but I got it turned over and ran for a few seconds before it died out. I had to fine tune the carb. Found a newer FP 40 on ebay for 50 bucks. That was used but hardly. I tore that apart just to check and clean it up. But no rust nothing stuck together had great compression. Bought for the new plane thinking they were close enough to be compatible that they took the same size engine. Nope that one takes 46-55 size. The 40 will get it off the ground if the condition of the run way weather isnt windy but otherwise it will hardly move. The only reason I didn't swap over to electric was it was a project my grandfather always wanted to do. Was build and fly a nitro plane. I bought a couple for him when he was put on hospice care he didn't want to go to a nursing home so i took care of him and we worked on them till he passed away back in October. I haven't had time since to be able to get back to working on it. Hopefully I can when I'm done with his will and rounding up all the stuff for everyone. I thank you for that information once I get back to it. I'm pretty sure I'm gonna need some more advice. On it.

 

[YSRRider]

What parts did the other airplane need that made you go buy a new kit?

 

[phinkin]

It needed cooling it was all busted up due to age a couple little plastic parts for the wing and a little bit of wood repair. I got a great deal also on the kit I found a sale on line and the kit was going for 160 bucks I paid after taxs and shipping was around an even 200 I paid 250 for the older. But I ended up right around the same amount in value from all the free parts and controllers I got I end up getting the Cessna I got a helicopter

 

[phinkin]

It needed cowling it was all busted up due to age a couple little plastic parts for the wing and a little bit of wood repair. I got a great deal, also got the new kit I found online and the kit was going for 160 bucks I paid after taxs and shipping was around an even 200 I paid 250 for the older one. But I ended up right around the same amount in value maybe a little more from all the free parts and controllers, 4 big boxes full. I end up getting the Cessna a bunch of parts just not what i needed to fix it, I got a helicopter with parts and I believe its called Grumman F7F Tigercat or at least that's what it looks like. That one just needs the right size engine and all the electronics for it and some touch up..

 

[YSRRider]

what helicopter you got? got pics?

 

[phinkin]

Kyosho not really messed with that one yet.

 

[YSRRider]

Kyosho not really messed with that one yet.

pics? want to get rid of it? I tinker with that old stuff

 

[phinkin]

These are the pictures I have of it

 

[YSRRider]

These are the pictures I have of it

View attachment 263712

View attachment 263713

Thats a very old Concept 30. You dont want to try and fly that. If you dont know how to fly them, it will be difficult from every aspect and there is no parts support left for those. If you crash it, its going in a dumpster. Youd want to start on something newer. These are good for sunday flying if you are expeirenced. You take it out jsut for nostalgic purposes.