choopi

My Feedback: (1)

Hello Guys,

I received mine yesterday, look extremely good for the price! I have two options for the engine, OS120AX(APC16x6) or Saito 82(14x4W or APC13x7), what do you think would be best for that plane? It definitely a fast build lot of work is done. With that kind of hinge do you need to seal the gap or not?

Lots of questions, thanks for the help.

Eric

M64

can anyone post any photos of there building of the extra 330s or can anyone give any tips or recomendations for the building of this plane.

Anything will be greatly apreciated

Thanks very much in advance!!!!!!!

M64

wc524

Besides the basic ARF building guidelines, check all of the joints and figure out where you are going to put your battery. Most people have put it on the tray already made for you. I put extra CA in the joints on the side of that tray to be sure.

As for the bottom of the wings put some stripes or checkers since the grey is hard to see.

The 120AX will make it ballistic, but the weight will be noticed. For heavy 3D the 120AX will make it easy to hover. I vote for it over the Saito.

rjz

I just made my firt flight today, it is an amazing plane.

I would reccomend the Saito too, the 120 will make it too nose heavy. I put a Super Tigre 90 on mine, and it was a little nose heavy already, had to add a noticebale amount of lead on the tail.

As for building reccomendations, try to place the fuel tank as far back as possible.

Be really careful when balancing the airplane, it really defines how well your model will fly.

Try to place double sided tape underneath all the fiberglass components (cowl, whellpants, wheelskirts) it takes away all the noise that comes from vibration of the engine.

Be careful with the rates, follow the manual, at the beginnning I set the high rates to all I could get, and it was almost a suicidal model!!! Specially with the Elevator.

Enjoy!!!

wc524

Glad to hear you made your first flight with the Extra RJZ!!! The elevator can be your demise if you aren't careful. I figured out that they were what was causing all my wing drop as stated on page 3 of this thread. I dropped my low rates down to 35% with 60% EXPO and have enjoyed it ever since. I like my rear CG, but I may move it forward a little bit to make the precision better and not kill myself if I do add too much elevator and drop a wing.

How was the G-90's performance RJZ???? Good vertical?? What prop you use??

rjz

Weel, Wc524, the engine performed excellent, it just needed a little adjustment on the idle needle, I just closed 1/4 of the factory setting, cause I am flying at 4000 feet in my city. It is an amazing engine for the price. Vertical is almost unlimited. Taking off it went upwards inmediately and was not going to stop climbing!!!. I thing I am going Super Tigre for all my 2 strokes needs from now on. Price-performance ratio is unequal.

Now in terms of the prop, I used 13X6, some guys told me at the flying field that I was using to small of a prop, but it flew ok. Perhaps I could try their suggestions in using a 14X4, or a 15X5 or 6. I will try that next weekend and let you know. They told me that even if the engine does not reach top RPM´s you will rarely fly this model at top RPM, specially for 3-D flying. So I will try those props and see if it hangs better in the air.

choopi

My Feedback: (1)

I finished the plane this morning, and I went with the Saito 82, good advise guys. I will try 14x4APC and 13x8 will see what is the best. I will watch for the elevator. I will keep you inform and will have some pictures tonight!

By the way, it was a fun build, not to much work, very good quality so far, will see what the flying part look like!

Eric

choopi

My Feedback: (1)

The plane is still in one place! It was a busy flt. [:-] I use a Y harness for the elevator and it was acting funny, so in flight, the servo were all over, I managed to land safely. After I play with the Y harness and elevators servos were acting all over. tonight I plugged the servo in my receiver JR790 and program the radio, took 5min, problem fixed!

Tomorrow, day two!

I tested the 13x8 prop today, I guess the 14x4W could the best I think.

wc524

skis....haha.....that's awesome! How was your vertical Choopi??

choopi

My Feedback: (1)

I went this morning for a short flight. It was so windy that I wasn't able to foward, the wing was strong and gusty, not good, so I'm not sure what prop is the best. Now I won't push my luck I will wait for calm wind!

WIND W 39 km/h
GUSTS 57 km/h
RELATIVE HUMIDITY 48%
DEWPOINT -7°C
PRESSURE 100.80 kPa
VISIBILITY 24 km
CEILING unlimited

Have to wait!

choopi

My Feedback: (1)

I Went out today and flew it with 14x4 and 13x6, it look like the Saito 82 wont do it. Definitely not enough power for me, it will be the minimum for that plane, the vertical is not very great and loop need to be tight. I think that that plane need a Saito 100 or OS90 with 15x4 or 15x6, I guess I will have to wait and a new engine for that one. Except that the flight good but grey under is tough to see.

It's all good! Just need a bigger engine!

wc524

I put one thick white stipe on both wings in the middle and on one I put a 6 inch chrome stripe beside the fuselage on only one wing. I love it and I can always see the chrome when in knife edge or far away. I love this plane I can kill the engine and not worry about wings dropping it just keeps floating.

Also dropping the rates on the elevator is the best thing I have ever done. It handles so well now......Now just to get the 28% Yak back in the air after my DX-7 gets here!

choopi

My Feedback: (1)

WC524 What engine are you using, Tower.75? What performance are you getting? With my Saito82 I was getting 9900 with 14x4W and about 10800 with 13x6 and it wasn't enough for that plane.

Right now I'using a JR7202, I got it just before the DX7, I would definitely like to use the DX7, I'm using the DX6 for my electric and I like it.
28%Yak will be fun with that radio!

Last night I put the Saito 82 back on the UCANDO, I'm looking at Saito 100 for Extra with a 15x6, that should do it, I really like to have extra power when I need it, especially for vertical.

wc524

The Tower .75 gives good pattern flight, but vertical and hovering are out of the question unless I went to all CF stuff and did some lightening holes. It's my fun-fly plane anyways and my yak and profiles are my 3-D machines.

I love the sound of that DA-50....finally got it back on the Yak today and fired it back up. Got to get a new servo case for one of my 5945MGs.....probably going to just get the 5985MG case since it's stronger. Then it's just waiting till I save up money for the DX-7. I am going to like not having to worry about interference when I get it. Been shot down twice now.[:@]

jgrant50

Hey RJZ,

Did you mount the engine in the factory mounting holes, or did you mount it at 90 degrees? I just got my kit in and plan to start building it soon. I also have a ST G90 so I'm anxious to get this one up in the air. I'm still technically a beginner, but can't wait.

rjz

I mount it on the factory holes, have not had any problems with it. Great engine by the way!!! You will enjoy it so much. Couple of tips though:

1. Make sure you don´t install the fuel tank all the way in front, try to put some foam that will cover some of the space in the front of the fuel tank compartment (about 2 incheas at least) and then insert the fuel tank. WHY??? Because my model was pretty heavy on the front side! Believe me, the fly a lot better ehn properly balanced. In addition, you definetely need to place the battery as far back as possible, you will see how little lead you will need to balance it properly.

2. As stated in the previous pages of this forum, try to use some fuel line or something else to avoid vibrations on the cockpit screws. WHY? Mine just came off loose and was flying apart from the airplane when doing a maneuver!!! Believe me , is not a comfortable airplane to fly and land with the cockpit off and the tremendous amount of air coming into the inside of the fuselage. Unstable is a short term to describe how this airplane handles in the air without the cockpit.

Enjoy!

jgrant50

Great - thank you for the tips. A few more questions if you don't mind - is there a suggested measurement for mounting from the firewall to the back of the engine? Also, how far back is the proper position for the cowl? In other words, how far does it slide onto the fuse?

Thanks again.

rjz

The suggested measurement is given in the instructions manual, but is the measurement from the firewall to the prop wash. If I recall correctly is 110 mm, not sure, check the manual.

Now, for the Cowl don´t worry. If you measure the exact distance and position of the engine the cowl slides up to the point where the prop wash is like 1/8" outside the cowl. Nice and neat, nothing difficult.

jgrant50

Cool - I fit the pieces together and see exactly what you're talking about so I think it will not be a problem. For the pull-pull cable though, I noticed the holes are covered towards the rear of the fuse - were yours covered as well? I tried to see if I could feel where the hole should be, but it felt like solid wood the hole way down. I was thinking about using an extra guitar string and threading it through to see where it pierced the monokote.

wc524

When I ran the pull pull through I used an old piece of wire to show me the spot to exit, then it was just up to fishing it through and using tweezers to get the wire out. As for an exact measurement, find the rear elevator servo mount (Lower one) then measure from the bottom closest to the rear. Measure down 3/8" then back 1" and it should be right below where the blue covering starts and on the curved portion of the wood sheeting.

As for mounting the motor I would put it as far back on your mount as possible since the extra weight is going to make it noseheavy. I mounted my motor at 90 degrees, but that's because my engine hates being at an inverted 45 and I wanted to use my pitts muffler anyways (much quieter)

rjz

A guitar string wont do it. Use a Pushrod wire as WC 524, I did that too. Just be careful with tearing the cover.

It took me like 2 hours to figure out that this was probably the only way out.

uproar05

I have really enjoyed all of the posts!! Thanks!!
After reading all of the reviews of Phoenix products, I could not resist the Extra 330S from Tower.
I am very impressed with the quality of the plane!
After getting prices for .40 size kits ($85), $139 for this ARF was the best choice.

The photos are great! I will try to post some shortly.
I have a Super Tiger .75 with pitts muffler that I plan to use.
In order to have the muffler line up with the bottom of the fuse/cowl, I will have to re-position the mounts.

I have started putting it together.
I finished up with the Horz. Stab this past weekend.
It lined up real well with the main wing.
The Vert Stab looks like it may not be lined up with the centerline.

Has anyone re-glued any joints?
Did they use a hot glue gun anywhere on the plane?

Great Thread. I will visit often!

SVI_

Hi everybody.

I am building my Extra 330s and I'm following this post. Regarding the engine I have a doubt. I intend to mount a Saito 125 but I don't know if it will fits very well. The length for this engine is 119 mm and as far as I know the distance from the firewall to the prop was is 110 mm. Any ideas?.

Thank you in advance

rjz

The only thing is that you would have to place the cowl a little bit in forward than what we have done with shorter engines.


In terms of performance I do not think you will have any issues.

SVI_

Thanks rjz. I'll do.