rashmore

I finally got to fly my new ultimate 120 today. It has been ready to run for at least a month, but today was the first decent flying day that we have had. Just a quick note to say that is plane flys like a dream. I have an os 120 4 stroke on it and it pulls it around the sky without much trouble. Its a brand new engine so i need to get it broke in, but when its finally seasoned im sure it will be more than adequate power to have unlimited verticle. Anyone wanting a nice 120 size ultimate should really check into this plane. It not only looks great but will do any trick in the book. Thanks Nitro! you got a real winner here!



Rod

Mr67Stang

Congrats on what sounds like a successful maiden... Any video?

opjose

Yup, I have the older model which is still flying.

The older one flies great with the O.S. 1.20 yet it is heavier than yours.

The new lighter version which you have, should be perfect with your combo.

Landings are quite nice.

rashmore

I dont have a camcorder but ill see if i can borrow one from a friend. I think you will love the way this plane flys.

RR24

Thats good to hear, should have my ready to fly next weekend, I have BCMA 26cc, didnt have to add any weight to get it to balance and it came out at 10lbs 1oz

peter2102

HI Guys,
I have just bought Ultimate 120. I would like to know, what engine is the best for that model ?
I mean OS Engine of course: 0.91 FX ( 2 s) ; 1.20 AX (2 s) or 1.20 FS (4 s.)
I think 1.20 FS will be OK. [8D]Am I right ?
Best regards
Peter

opjose

I fly the older ( Pink ) version which is heavier with an O.S. 1.20 Surpass III FS Pumped.

While the plane flies very well, it is NOT "unlimited verticals" so I wish it had a bit more power.

The yellow version of the 1.20 is much lighter and should do well with the 1.20 FS but a bit more engine power may be recommended.

The 1.20AX produces more power than the FS ( more akin to a 1.60-1.80 Four Stroker ) so it should be fine.... if you go this route you'll need a Pitts Style inverted mount muffler though.

The .91 FX would be similiar in performance to the 1.20 FS or there-abouts.

peter2102

to opjose:

so, what do you think about 1.20 AX (2 strock) ? - Is it better choice then 1.20 AX or 1.20 AX will be OK ?
1.20 FS - the price is max - I can pay.
(Ultimate 120 - 4.500 g)
Peter

opjose

Sorry I don't understand the above question.

You ask if the 1.20 AX ( 2 stroke) is a better choice than the 1.20 AX or will the 1.20 AX be OK?

All are the same engine.

peter2102

Sorry,
I mean of course, the 1.20 2-strokes

http://www3.towerhobbies.com/cgi-bin...?&I=LXLGJ0&P=7

and 1.20 4-strokes ?

http://www3.towerhobbies.com/cgi-bin...?&I=LXBY64&P=7

Which one is better for Ultimate 120 (yellow) in your opinion ?

Best regards
Peter

opjose

Well... the plane will do OK with a 1.20 FS ( 4 stroke ).

But it will have MUCH more power with a 1.20 AX ( 2 stroke ).

However on this Biplane I prefer a four stroke.

So to get the equivalent power as the 1.20 AX, on a 4 stroke engine you would have to move up to around 1.60 CU to 1.80 CU four stroke engine.

A comparison between the 1.20AX and a larger four stroke engine would be more equitable.

As it is the 1.20AX has more power. If I had to choose between just those two, I'd go with the 1.20 AX, but I would be hit with higher fuel consumption.

ozzmanace

My Feedback: (1)

rr24- how is the performance with the 26cc

ozzmanace

My Feedback: (1)

any one have to wait 4 week for delivery. i'm still waiting and nitro won't reply

peter2102

to opjose,
You are right, 1.20AX "drinks" more fuel ... [:-]
It means I will buy .......... 1.20 FS, [&:]because 1.60 twin 4-strokes is very expensive.

http://www3.towerhobbies.com/cgi-bin...?&I=LXBY68&P=7

There is no engine between 1.20 and 1.80 4-stroke from OS.[>:]

Best regards
Peter

RR24

havent got to fly it yet, waiting for a good day, maybe this weekend, but the engine runs very good, just havent got to try it in the air

RR24

Flew my 120 today for the first time, the plane flew very well, but would be easy to ground loop if you not ready with the rudder if you hit all the power at once, the 26cc didnt have the power i was hoping for, but this is my first gasser, and i am sure i had it to rich, so i am sure it will do better with a little more tunning

Wes

opjose

If you find that you are having ground looping problems, do this...

- Try to "toe in" the wheels a bit.
- Replace the tail wheel assembly for one that will permit the plane to sit in a more level position.

In effect you want the nose not to point "up" as much when the plane sits on the ground.

This will have a rather dramatic ( improvement ) effect during run-up.


For a suitable replacement tail wheel assembly WITH an included rubber wheel and aluminum hub at an unbelievable price check this out.

[link=http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXLLB9&P=7]Tail Wheel Assembly and Wheel.[/link]

Yes you see that correctly... $1.98.

RR24

Yes i put that tail wheel on it already, saw that it one of your post awhile back, so i bought 3

Thanks for the info

Wes

peter2102

Hi guys,
I'v been think about OS MAX 1.20 FS, and I'm afraid - it maybe weak a little. What do you think about it, and what will you say about ZEONAH G23 ?

http://www.horizonhobby.com/Products...ProdID=ZENE23A

or similar,

- better price, power and economy (in my opinion of course).

Best regards
Peter

RR24

The G23 weights about 12oz more than the 26cc i have but power wise it should be about the same, you will have to put all your servo's and radio gear to the back and may still have to add weight for balance, mine weight 10lbs and 1oz, didnt have to add any weight, i went will the gasser to try somthing new, and so far i like it

peter2102

Thank you for answer.
So what kind of Gas Engine should I have to buy ?
(is ZEONAH OK ?)
Take a look at: http://www.hobbycity.com/hobbycity/s...1&v=&sortlist=
for different engine models (26 cc) please.
Best regards
Peter

rashmore

Peter,

My ultimate flys VERY well with an os 120 fs on it.

I have also just bought the XYZ 26 cc (c-spec) engine from hobby city. I have not run that engine yet. Its very lightweight and seems to be pretty well machined. Other than that I cant tell you how good a motor it is.

Please note, if you do put a gasser in your biplane, it will be heavier, not just because of the engine weight, but you also need an extra battery pack and switch for the ignition.

If you do buy an engine from hobby city, be careful which one you choose. Look in thier forums (marked Customer community) and read the issues that ALL of thier cheaper gassers have had before spending your money on one.

Also, be sure to seal the covering edges of your plane really well. They use very little overlap and the covering doesn't stick as well as it should around the edges. I had to replace almost all of the hardware that came with the plane to something a little more stout. Believe it or not, with the os120 fs in it my ulitmate came out to 7 lbs 4 oz. I had to do a double take and had it checked on 2 diffrent scales. It is VERY light plane and flys like a dream. I havnt been able to get it to hover, not because of lack of power, but probably to lack of skill and I probably need to move the cg back a little to make it more stable, however after leaving the runway, i can point the nose straight up and it will just keep going. I have no doubt the os will pull it out of a hover without any trouble.

hope this helps and good luck!

Rod

peter2102

Rod,
Thank you very much for big post, and I have no doubts now.
You are right, extra equipment is necessary for gas engine (unfortunately) I have forgot.
Now I am sure, I must buy the OS 1.20 FS
- 1.9 HP, big torque, economy, guaranty and your opinion of course - say it.

Thank you very much once again
It will be OS 1.20 FS
Best regards
Peter

opjose

Yup I mentioned this to him too.

With the new lighter version that he has a 1.20 FS will do even better.

A 23cc gasser adds additional weight, so you are offsetting the benefits of the gasser with the added weight, so overall you come out about the same.

I recommend that you apply several coats of Top Flite Clear coat, after lightly buffing the covering with a plastic dish pad, and cleaning it off VERY well.

After the clear coat has dried you may buff it again with the dish pad for a fantastic appearance.

Your covering will not lift up again.


Wow that's fantastic!

My older 1.20 came in at about 11lbs!!!

I may just have to buy the new one to get the better performance!

From what you are saying it sure seems worth the "upgrade".

Excellent. A FS 1.20 Surpass III pumped on a 7lb biplane would be amazing.

rashmore

Good luck with it Peter! Dont forget to give us some pictures!

Opjose is a WEALTH of information on the nitroplanes products. I am sure he will be kind enough to answer any questions about building or anything else for that matter. He has helped me alot.

Jose,

The plane is really great. I didnt have to do much more than squirt some glue here and there and replace the hardware (which you suggested) and it came out looking great and flying even better. I think its the best 120 ultimate on the market right now.