Garrelc... I'm sure Robarts will work fine... When I was going to put my S.T. together
I ordered a 36?? pack with tool, but after checking it with the trailing edge It seemed
that only one barb would stay in the bulsa.... Wasn't sure if that was enough, and I did
not want to remove covering to modify... So I went with GP pinned hinges with gorilla
glue.... So far so good......

Don't worry, Gorilla Glue sticks outstandingly well on robarts. You can slightly roughen the surface for better glue adhesion if you still are skeptical.

I have a 33% Extra with the big robarts (3/16") and I use only 4 per elevator half and each one has only 1 or 2 barbs. When I glued them, I was worried too and checked them carefully only to find everything else will blow away before the robarts...

3D along with IMAC flying for almost 2 years now with this setup and it is as good as new.

vsustko - I've noticed these tendencies you describe on several aircraft. For me, it depends on how much elevator I'm using when it comes to rolling out of tight loops and tip stalling. I think almost any airplane is going to roll out of the loop if you give it enough elevator.

Also, in the harriers, I've found that getting the nose up and using smaller amounts of elevator with generous amounts of throttle, (sometimes pulsing/revving the engine helps) are what help keep the wings from rocking.

I've had other 3D aircraft and all of them, with enough elevator input, will start to roll or snap with enough elevator input. You may try bringing the CG aft a little bit to see if that helps you to use less elevator in the high alpha maneuvers, thus making the unwanted rolling lessen.

-Pat

Uh Oh.... Ryans back!

I drove by the field on the way home today and saw Rob out there with your 540....

I want to see that showtime!

P-Diddy,
Thank you for your advice. I will take your suggestions and experiment with it a little

I've done 10 flights with my showtime, powered by a saito 120 S. Haven't flown it with the SFG's.

I'm not completely satisfied, rather disappointed with the power. I thought you could hover it nicely with a saito 120, but to keep it on altitude you have to give more and more throttle. After 10 seconds hovering the plane is loses altitude quite fast with full throttle. The engine is new. Runtime: 120 min.

I fly it with a 15x6 APC prop. Fuelmix: tornadofuel 10% nitro.

Do I have to do some more flights until the engine gives it's full power. Or is it the prop that isn't right?


What do you guys think?

30% heli fuel.

Try a APC 16x4W prop.

I think you should switch to an APC 15X8 and see if that helps. I think you'll still be a little disappointed with the power output since you won't be able to power out of a hover, but it should be able to sit there.

If you really want that 3D performance, you could try a Perry Pump. It made all the difference in my Saito 1.20. It turned it into a rich-running hog into a powerful, economical engine.

-Pat

I am running Saito 150, wehich also has only about two hours run time.
It has enough power to pull out of hovers with 10% nitro and Master Airscrew 16x10, but I was expecting a little more power out of it. I will try running higher nitro.

vsustko...

I think you are over proping your 150. Try going to a APC 16x6 and that should make it better. Then if you aren't satisfied start going up in nitro. 10% is pretty low. I always use 30% but I'm high. I would think a minimum of 15% would be required to make it run good.

Thanks
Barry

I tried a 16x6, but that seems to make lots of noise, but not much movement though. I will try higher nitro and a 16x8, whihc is a prop lot of people run on this engine. But i have to agree that at least with thois nitro its too much of a prop.

saito 150, APC 17-6, 10% nitro. i was considering trying 5%. watch at the very end for pullout. by no means sluggish. and sorry for the video quality, i am working on that. http://s30.photobucket.com/albums/c3...t=showtime.flv

Good video as an example of pull out. Mine is definately weaker than this with 10% nitro.

I am running calssic series 16x10 and it produces 12 pounds of thrust at around 9,000 rpms. Same rpms with a APC 18x8, but only 9 pounds of thrust. I just do not get it, where does all that energy gio with an apc???

I did not try flying with the apc prop, maybe it acts differently airborn?...

just try an apc 17 6 or 16 6. the 16 6 worked for me also.

Try an APC 17x4W, this prop should give you the best 3D performance and hover pull out. I run one on my Showtime with YS 110 and it is great for 3D flying!

BK

I fly at the same field as whaturi. I can assure you that this plane out-pulls the YS110 by a long shot. I have had 2 of these planes, one was with a well broken in YS110 on 30% that lunched the exhaust valve then the plane got an OS108, and the other was with a Saito 125. Neither had the power that this 150 has.

We had a member attach an altimeter to his plane last weekend, If I remember correctly he got it up to either 2200 or 2400 feet. About half that distance was straight up, then a little level flight to get some speed and then straight up the rest of the way, followed by an inverted flat spin most of the way down and like he said, he is using 10%.

This thing does not stick around long after he plants the throttle out of a hover and if you look close in the video, it's really rich, I'd say it's very close to foamy power.

About the only thing I think that might have a chance of out racing him from a hover would be my DA50 powered Cap at 13.75 pounds. He might beat me from the start but I think I could catch him but since he out hovers me by a long shot, I would not even try it.

He just did another video tonight, hopefully he'll get it posted soon. He did a tail touch that wasn't meant to be and firewalled it and this thing just disappeared in a hurry, kinda like, now ya see it and now ya don't

yeah, this plane is a perfect monster with the saito 150. nice wingloading and angry power when you hit it.

i want to race the cap!

tonight i was hovering it and letting the wind blow it towards me. right when it got a few feet in front of me, the wind blew it down or the thottle servo twitched, because i dropped down and tailtouched like two feet in front of me. i hammered it and it was gone. i have it all on video. i am working on a better video with this thing. my girlfriend always brings her camera along and films without telling me, otherwise i tend to get nervous and start dumb thumbing.

Check you PM's in a few minutes. I'm gonna right up instructions to post it where it will look much better...

hi i got a showtime some time a go, i wanted to put a super tig 2350 in but found it to difficult (maybe i did'nt have the skill!!!) so i'm going for the ST.90, not to bad an engine but not convinced about having all the power in world, like my dad says.....

I finally got a pic of my tail wheel. It is a 60 size sullivan with a 7/8 wheel. I also use 2 3/4 main wheels. This gives it a nice angle on the ground and takes off quickly.

Whaturi... I run a Saito 150 in my showtime also and it definitely doesn't have that kinda pullout power! I am running an APC 17x4W and the engine is new but broken in by now. I've been wondering about it, I get about 9800 RPM's in a run up on the ground. In a hover, when I firewall it, it just sort of bogs down a little and barely pulls out and its very dissapointing because I got the 150 in hopes it would do like yours does! Maybe its my low speed needle? BTW I use 15% nitro.

Also, I get a ton of wing rock in my showtime in harriers, I can't even do one because it rocks so bad which makes me mad! I want to harrier and rolling harrier with it but it wont stop rocking. I definitely can't bring it down to the ground in a harrier because of fear I'd lose it. What should I do? I want that perfect 3D monster you describe but mine doesn't fly like yours! [>:]

im using an apc 17\6 on 10% spinning at around 9200 peak i think. i think the 17 4 is not enough, but still, even with the 17 4, your showtime should pull out nicely.

for harriers, i find i am giving all 4 inputs the whole time i am in a harrier. not just hold the elevator and drive around. maybe your plane is excessively heavy? that would explain the pullout problem along with the harrier problem. go up high and do a short dive. then pull 3d rate up elevator. if it floats nicely down, as mine does, and bubbagates had one that would do that, then you miight just need more inputs in your harriers. if you do that and it drops a wing and looks like a dead chicken falling out of the sky, maybe you are to heavy or have a severe mess up on the elevator halves sychronization.

NEW VIDEO! click on "vinnyshowtime" http://www.hiddenhangarrc.com/video/

Yeah I can understand having to use all 4 inputs but mine is more than that. Is there any way you could weigh yours RTF? I am going to have mine weighed also.

I know that my elevator halves are in sync, I've checked that. I am running 4 Hitec 5625's and a 5645 for rudder, a 2700mAh NiMH battery and I'm using a 20oz fuel tank on the CG. Those are the only things that I have that would add weight. I can't imaging 3 extra ounces of fuel would make it too heavy over stock plus is doesn't matter when i try to harrier even after I've burned fuel.

How about CG? Would that effect how the harriers turn out? My CG I think is pretty much at recommended, maybe it should be further aft?

Nice video by the way, good flying!

i think mine is around 9 pounds 8 ounces.

the cg is so that inverted it will dive some, but not to much.. don't know if that is a good explanation. i don't think cg would cause much wing rock.

have you done any elevators with it? if so what happened?