is a 91 super tigre enough motor to fly the goldberg ultimate if it come out light I know it is not going to be a powerhouse but what I am concerned about is if you get in a little trouble with it is it enough power to pull it out and just fly it ok.[sm=bananahead.gif][sm=bananahead.gif]

It's plenty of power. I have one now with a .90ST. It's my second one. If you want to hover a lot put a 4-C in it. Other than that it's perfect. With a little modification you can even use the stock muffler. It makes more power than a pitts style. I have flown mine with a MA 14x6 and a APC 13x8. The 14x6 is better all around. The 13x8 is faster. These things will haul a** for a bipe. I need to try a 15x4W to see if it will hover better. Later David

Don't get me wrong here, but you have posted the EXACT same question on 11/29, 11/28, and twice on 11/27. This makes the fifth time you have asked the same question in the ARF section. I responded to your first round. I believe I saw it in another section here as well. I'm not a moderator, but I think your question has been answered.

bdtsr I only got one response and it did not answer much do you not like a second opinion thanks for caring so much about what i put on here

Sorry but you got several responses to your question including mine and they answered your question. How much more information do you want? You asked A question and it was answered. I'm not trying to be a stone breaker. I see that you have only been a member for 2+ weeks, there is no need for repeat threads. The search button works very well, I suggest you try that in the future and many of your questions may be answered without even having to ask it. Make sure you check the "Notify me via e-mail when someone replies after posting" box so you get the response notification.

It will be fine. I had a Saito 100 in mine and I was not satisfied with the setup. It just wasn't enough vertical power. Sounds like you've already got a .91 but haven't installed it yet. you will be pleased with the airplane, it flies great and lands wonderfully for this type of A/C. Good luck.


< Message edited by icrashbipes -- 11/29/2003 12:47:11 AM >

oh yeah, this airplane is setup for a .60 size engine. Should fly it great.
Clint

the best thing I ever did to my Goldberg Ultimate was take the sf61 out and replace it with a FX91!

The S/T 2 stroke 91 is PLENTY of power for the Goldberg Ultimate. Most of the people who fly this plane use a 4 stroke of similar displacement. You will find that your Supertigre will perform more in the power ballpark of a 1.2 to 1.4 4 stroke.

You will not be dissapointed.

Most of the Ultimates around here are flown with .91 size 2 strokes. Verticle is unlimited. I had an ASP 1.20 2c in mine just for kicks, WOW was it fast! I took it out before I tore it apart. I then mounted a Maloney 1.00 in it, again just for kicks. Was a real sled, but neat. (This was mine)


Here they are. They ALL say the same thing, YES IT WILL BE PLENTY OF POWER.

thanks for the response everybody I cant wait to fly this thing this spring

Would a Saito 180 fit this bird? I have one sitting on the shelf, and it needs a home. I would like to put it in the Ultimate.

Anything will fit anywhere if you want it to! A 1.20 4c is more appropriate for this Ultimate though. Take a look at the DP Ultimate, your Saito maybe more at home in one of these.

Agreed.

I just finished one with a Laser 150. This engine actually puts out the power of a strong 1.20 and is, IMO, perfect for this airframe. The four flights I put on it yesterday, in dead calm conditions, were some of the most enjoyable plank flights in memory. I built the kit about 10-12 years ago, with an OS 1.20 Surpass, and it was good, as I recall. This ARF is simply fabulous; well worth the $300+ price tag.

I dunno know for sure, but I doubt it will "hover", pull out of one, etc., etc. I have helicopters for that sort of thing if the urge strikes...

No doubt a Saito 180 will fit. But I would beef up the firewall big-time, and get a bigger tank; the kit comes with a 16 ouncer, and a Saito 180 would go through that in less than 10 minutes. It is easy to lose track of time while flying this bird; it is that smooth and enjoyable. There is plenty of room for a bigger tank, so that's not a concern. Just cut the covering away from that bottom front panel; makes fitting/installing the cabanes and tank infinitely easier.

I'll post some pics this evening if you're interested...

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Sure we are interested Steve - Please Post away. Now that you have some time on it is that engine worth that pretty price tag it has on it?

You can get a YS 110 for about $ 350.00, it will swing about the same size prop and weighs 728 gms vs 850 gms. (both W/O Muffler)
You know I have one of the Laser 150's but that FZ-110 sure seems like it would fit the Ultimate well.
Well two weeks to think about that engine choice for the Ultimate.

Thanks

Well, I certainly do NOT want to start another urination competition regarding YS engines; and I especially do not care to be told by the YS-O-philes that the reason I had difficulty with two YS engines is because I don't know how to tune an engine. Perhaps, but I seem to do all right with the many OS, Saito, and now this Laser four strokes; and my 91 FZ ran like a top for year before suddenly getting flaky.

Anyway, this Laser replaced that 91FZ, which was originally going into this model. If you feel comfortable with YS, then I have no doubt the 110 will have plenty of power. As we discussed earlier, I am just a bit leery of that "extra" stuff on your Laser 150. Side-mount the engine and take it all off...

Yes, the Laser is worth (so far) every penny. While it purrs at idle, that exhaust extension pipe produces a deep, throaty roar at full throttle that everybody who hears it comments on. I haven't run it with the standard, supplied muffler. Gary at Proctor told me that muffler will load the engine down somewhat.

I'm still tweaking the mixtures. I've got over a gallon through it now, so I'll begin leaning out the top end next outing. Gary said the top end wouldn't improve much, but the low end would get downright amazing;, like a steady 1800rpm idle all day long. Its idling around 2300 right now; it will go down to 2000, but I don't trust that in the air just yet, know what I mean?

I was concerned about starting it, and that open vent line (no muffler pressure), but both have turned out to be non-issues. Open the throttle to full, pull the prop through compression three or four times (WITHOUT choking), back to idle, bump it with the starter, and she's purring. And the potential siphoning problem when inverted just hasn't occurred.

The only fly in the ointment is the blow-by, leakage, whatever you want to call it, from the exhaust extension. There is a 90-degree bend right after it exits the head (for firewall clearance), and it is leaking from there due to the intense heat. Gary said that was to be expected, and not to worry because even if the part failed, it wouldn't hurt the engine and they would replace it. Sure is messy, though.

Overall, I'm extremely satisfied. The throttle transitions well, the engine starts and runs easily and smoothly, and has plenty of power. I was told that this engine puts out about the same power as a strong 1.20, and I'll agree with that. My Saito 150 had more top-end grunt, but it also shook like dog trying pass a peach seed. This Laser is smoooooth...

I'll post some pics when I get home.

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Here it is, static and in flight.

The third photo shows it alongside a Direct Connection ARC, which was out for its maiden flights. The owner said the construction and fit was flawless. You can see that it is slightly larger than the Goldberg.

Alas, it didn't fly. The YS 120 under the cowl, fresh from an inverted installation in a GeeBee R2 (where it ran great), refused to cooperate; despite the attention of two hard-core YS guys at the field.

Guess they don't know how to tune an engine either...

Steve, The Ultimate looks nice. Now how about some video w/audio thrown in so we can hear the Laser!? I've heard the Laser's were a little soft on power compared to others in the same size, but if it's that smooth and cool sounding, who cares! The V-Twin looks pretty cool as well, I'll bet that sound is something to hear. Sorry you had poor luck with YS engines, I guess any production line can produce some bad ones. My to .45's ran like clocks. Hope if you ever get another it treats you better.

Video? Ya gotta be kidding! I'm doing good to get these still shots posted...

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Aw com'on, please!

Well done Steve!