piper j3 cub
09-11-2016, 04:01 PM
#6
Most J3 Cubs need use of the rudder to fly properly due to something called adverse yaw. If you would like to research, there was a good article in Model Airplane News a few years ago by Garry Yarrish I think.
Get a nice Sig trainer and build a Cub while you are learning on the trainer. Great Planes and Goldberg....both sold by Tower are good kits. If you want an ARF, I think Hangar 9 still has one.
good luck and have fun
Get a nice Sig trainer and build a Cub while you are learning on the trainer. Great Planes and Goldberg....both sold by Tower are good kits. If you want an ARF, I think Hangar 9 still has one.
good luck and have fun
09-11-2016, 06:33 PM
#7
My Feedback: (1)
If your trainer has a tricycle landing gear, after you get good at flying it with that landing gear setup convert it to a taildragger. Then after you get good at flying it as a taildragger you will take to a Cub much easier. Take all advancements in steps. A knowledgeable mentor to help, teach, and advise is always good too. Enjoy !
09-13-2016, 05:04 PM
#10
Yes! I fly a few of the smaller gassers and they run very well and for a very long time on 8oz fuel.
The Evolution 10GX will fly a 40 to 60 size trainer or a Cub:
http://www.horizonhobby.com/product/...etor-evoe10gx2
The Saito is another choice if you want that 4-stroke sound:
http://www.horizonhobby.com/fg-14c-%...3A-bu-saieg14c
The Evolution 10GX will fly a 40 to 60 size trainer or a Cub:
http://www.horizonhobby.com/product/...etor-evoe10gx2
The Saito is another choice if you want that 4-stroke sound:
http://www.horizonhobby.com/fg-14c-%...3A-bu-saieg14c
09-14-2016, 08:32 AM
#14
See post #10.
A full wing 60 size cub can be flown very scale-like with a 10cc. It will be more powerful with a 15cc plus if the plane needs nose weight then a larger engine is an answer rather than adding dead weight.
A 20cc is too much in my opinion. Now if it was a clipped-wing cub then you could have some fun with a larger more powerful engine.
A full wing 60 size cub can be flown very scale-like with a 10cc. It will be more powerful with a 15cc plus if the plane needs nose weight then a larger engine is an answer rather than adding dead weight.
A 20cc is too much in my opinion. Now if it was a clipped-wing cub then you could have some fun with a larger more powerful engine.
09-15-2016, 03:47 AM
#16
Moderator
I'd agree on the 15cc too. If you want to go wtih a 4 stroke, the Saito 21cc would be the true best for a gasser. But it is a heavier engine so you'd be raising the wing loading a good bit with that.
09-15-2016, 06:04 PM
#19
Well Mark as the late great jimmy Durante would say its all about the all about the 'Schnozzola' the nose, the airplanes nose that is. You have been talking a lot in a number of forums about two airplanes (and that's great), Of course the two are the large Cub and the Cadet senior. Now when you asked about the Cubs and what type gas engines I agreed with many here that the 20cc is two large but I felt that the an OS 15 was ideal and first one reason I like the OS best is that it has an OS carb in the front unlike some others. a rear rotor or reed valve engine normally has the carb in the rear and this can present installations problems. So ya the OS 15 is perfect in the Senior Cadet and the installation is easy, remember I have and fly one.
Now lets talk about that same OS 15 in that Cub Well maybe not at least not for me and here is why. The power match would be perfect "BUT" IT s its all about that nose. Look at the Senior Cadet: That nose is as wide as that naturally already wide fuselage and its easy to fit anything from a small glow .35 which I have done all the way up to the .15 gassor But now lets look at that Cub at least the J-2's to the J-5's full scale versons (note the Senior Cadet is not a scale airplane of anything) The scale cowling on any of those versions will have a cowl that goes from a narrow fuselage down to a vary narrow width just enough to cover the crankcase nothing more. The cylinders are left entirely in the breeze and just some sheet scoops on top called the "eyebrows".
Now normally on most cub J-2,3,5"s models the engines are normally mounted sticking out the right side and some sort of detailing on the left side to simulate the lovely cylinders. When engines very large are used too much of the little cowling needs to be cut away. In some cases you can use some gassers that are rear Carb and that carb can stick out on the left side. to simulate the left cylinders.
So to answer question about that .65LA for that ninty inch Cub. While it would have no fit problems but I feel it would just be a little to lethargic for that ninety inch Cub and you would soon be bored with it. If you no objections to two stroke I feel that either the .75AX or the OS .95AX would be just right.
John
Now lets talk about that same OS 15 in that Cub Well maybe not at least not for me and here is why. The power match would be perfect "BUT" IT s its all about that nose. Look at the Senior Cadet: That nose is as wide as that naturally already wide fuselage and its easy to fit anything from a small glow .35 which I have done all the way up to the .15 gassor But now lets look at that Cub at least the J-2's to the J-5's full scale versons (note the Senior Cadet is not a scale airplane of anything) The scale cowling on any of those versions will have a cowl that goes from a narrow fuselage down to a vary narrow width just enough to cover the crankcase nothing more. The cylinders are left entirely in the breeze and just some sheet scoops on top called the "eyebrows".
Now normally on most cub J-2,3,5"s models the engines are normally mounted sticking out the right side and some sort of detailing on the left side to simulate the lovely cylinders. When engines very large are used too much of the little cowling needs to be cut away. In some cases you can use some gassers that are rear Carb and that carb can stick out on the left side. to simulate the left cylinders.
So to answer question about that .65LA for that ninty inch Cub. While it would have no fit problems but I feel it would just be a little to lethargic for that ninety inch Cub and you would soon be bored with it. If you no objections to two stroke I feel that either the .75AX or the OS .95AX would be just right.
John
09-15-2016, 06:48 PM
#21
Moderator
You asked about gassers, Mark JR. Gas vs. glow is a whole different conversation. It sounded like you were settled on a gas engine for this plane, but if not that definitely opens up your possibilities. IMHO, a draggy plane like a Cub flies best with a 4 stroke because of the larger props they can turn. And since it's a scale plane, the 4 stroke sounds right too. A Saito .91 would be great for your plane.
On a Cub, there is a lot of leeway. It's not like you are racing or doing aerobatics and need to get every little bit out of your combo. You're just going to putt around the sky in a big yellow plane. A strong .glow 60 will fly it well on smaller props turning more RPM. The .65 LA won't. Any .90 2 stroke will have more than enough power, We've already discussed gassers and 4 strokes, so there isn't much else to say on that topic. The fact is it doesn't really matter as long as you stay in the range we're talking about..
On a Cub, there is a lot of leeway. It's not like you are racing or doing aerobatics and need to get every little bit out of your combo. You're just going to putt around the sky in a big yellow plane. A strong .glow 60 will fly it well on smaller props turning more RPM. The .65 LA won't. Any .90 2 stroke will have more than enough power, We've already discussed gassers and 4 strokes, so there isn't much else to say on that topic. The fact is it doesn't really matter as long as you stay in the range we're talking about..
09-16-2016, 06:53 AM
#22
Mark I love the entire lower end of the AX line up to the .95's no experience with the larger ones but own and operate many examples of them on a wide variety of airplanes. But I gotta say I really love that OS 15cc.
I only have one example of that engine but you know its on my last cross country airplane, the one I,ve discussed in other threads of yours and its gonna stay. That airplane started life with an: OS .95AX, OS .65AX and finally the OS 15cc spark ignition.
The 15cc gassor engine comes with either a spark ignition or glow ignition as noted I,ve no experience with the glow ignition version but the spark version is reliable to the extreme and a real stump puller and my favorite over the .95AX in many applications.
John
