First off I'm the new guy so bear w me.. Second I really have used the search feature and haven't found what I was looking for..

So w that said I have a Thunder Tiger 90 (That IS the 2 stroke correct?) And have a option to by a new four * 60.

Is this too much engine? I have seen 90 fourstrokes ect. but not this.. Just like to hear if this is a good match or not.

Thanks guys!

This is my first post under the new rc universe, so bear with me. I have had two 4* 60s and powered them both with 75 two strokes. The first one was a Supertigre and the other is Tower hobbies 75. They seemed to have plenty of power with a 13x6 prop and I think the 90 would be a little overpowered. However I am no expert on this as I am your every day sport flier.

I don't think a 90 Super Tigre is too much for the 4*60. I would certainly use throttle management when necessary.

I have one with a Sport Jett .76 and Dub's tuned pipe, which should be comprable to a 90 (or so, LOL) and it flys great. Actually, it's a rocket, but that's what the left stick is for, yes?

There are guys that have 4-S 120's on them with no problem.

Good luck and have a ball!

Geez o peas man..On a 4*60!? Wow if thats the case I'm sure the 90 would be fine! I wonder if the empennage would be better off with a wire support brace?

Thanks!

Couldn't hurt to put some hard-points in and install some flying wires, but I don't think it necessary.

When I over-power an airframe I look at the firewall first -- drilled and pinned and triangle stock installed. Next, it's the wings -- great bond between both halves plus the seam is fiberglassed. I do (always) reinforce the vertical and horizontal stablizer at the fuse with tri-stock above and below.

Other than that (and good throttle management), never had a problem. (knock-on-wood, LOL)

Let me ask you one more question Crash_n_Burn about flight characteristics..
How does this *Super-sizing* effect slow and approach flight w the Four *, or the like?

I guess w a proper CG it shold be more or less the same, just maybe a tad less floaty due to weight?

Big Thanks!

Maybe a tad less floaty, but in reality, the few extra ounces doesn't make any real noticeable difference. It still floats unless your final is long and flat.

I balance at the aft recommended CG point and it seems to handle just fine there. Needed to use a double battery pack behind the rear cockpit former in order to get it to balance without any additional (unnecessary) ballast.

With a .60 or a .90 (or a 120) it will do just about anything that you ask it to do. It is a wonderful plane and one of my favorites.

Hell I never thought of doubleing the battery pack! Thats a great idea!

You'll have to forgive me..I've been out of rc for a while! Heck My Extra300 has I don't know how many Oz. of lead in the tail! [:'(]

Thanks again!

A .91 works great. I have had them with an OS .91FX and a Magnum .91XLS with a Performance Specialties Ultra Thrust muffler. Can you spell vertical. Knife edges all day.

I put the rudder and elevator servos under the stab, side mounted the engine, full cowl, clipped 2 ribs and added back rounded tips, moved the gear to the wings, added length to round off the fin and stab. It is now a mock WW II Kawasaki Tony.

Excellent flying plane.

If it is a Thunder Tiger .91, it is a four stroke.
They do not make a .91 two stroke.
They do make .61 and 1.20 two strokes.

A .91 four stroke is recommended for the plane.

Wow Ed cool Job.. Did you decide to Mod a perfectly stock 4* 60 or did you have to decide to Umm...reinvent one after a unfortunate mishap ? (Its just a lot of changes is all!)
Why the elevator servo under the stab and how have you beefed up the airframe?

carrellh, no it definately is Not a 4 Banger...So it must be a Super Tiger I suppose(Obviously not been seen by me in a while!) Definately a 90 and definately a 2 Stroke.

Here is my .02$. I have a Saito 91 in my 4*60, and I think it is the perfect engine for this platform. Balance is always an issue with this plane because of its long tail moment, so I put my engine as close to the end of my Dave Brown engine mount as I dared. I also substituted a 4*120 landing gear for the soft stock gear, and I came in right at the balance point by just moving the battery under the tank. The plane flies great and is a absolute jewel to land. Just line up on final, and let her settle right in the groove. BTW this is my second plane, and this is a great step up from a trainer.

Hello; I have been flying my 4*60 for a few years now (maybe three) with an old OS90 4 stroke, and am very happy with it. Another fellow at our field flys a 4*120 with a super tigre 90, that also works great. I love that huge prop and teh things I can do because of it. The fellow with the 4*120 zooms around at full throttle all the time, and can't be convinced to throttle back and enjoy the slower speed handling. I don't know really how that plane handles except at high speed. The ST 90 does that pretty well, I don't know if that engine won't run cleanly at lower revs. I suppose if you want to scoot around and never attempt low speed handling, I suppose a big two stroke will do that. I p[refer the four stroke myself, I enjoy flying at the slow end oof the flight spectrum.

I sure hope it does cause I expect I'll be going at 1/2-3/4 throttle more than half the time!

I'm putting a Saito 100 in mine, which is the same weight as the Saito 91. Can't wait to try it out.

I've got a 4*60 with a YS .91FZ mounted up front which gives the plane the power of a 1.20 size motor. This combination allows me to take off and go directly vertical with no hesitation until I decide that is high enough and level off. My 4*60 was a kit which allowed me to modify the plane more than an arf could be (well easily anyway). Extra support, bracing, 1" extra on rudder and elevator, dual elevator servos, pull-pull rudder system, front hatch compartment, Modified rudder on top to act like an "Extra 300" rudder acts with the counter support on top while flying and a few other mods that were done. Hovering is no problem what so ever with this YS engine. Knife edging is very easily accomplished. Just remember that the 4*60 is not a pylon racer, so be easy with the throttle in a dive if you use an over powered motor, but the vertical performance is outstanding.

I would suggest the following motors in order of preference..
YS. 91FZ
YS 1.10FZ (more costly than the .91FZ)
Saito 1.20
Saito 100
Saito .91
OS 1.20
OS .91 w/pump
OS .91

All 3 brands listed are very good motors and any one of these motors above will fly the 4*60 with ease and much fun. Vertical performance would be great also, but landings could still be made at a snails pace with full flaps deployed.

My thoughts on the matter.

Enjoy your 4*60,
DTB

Have several people at my field with the fourstar .60 and they are mostly powered by .91 fs and a couple have Saito 100's on theres. Either engine is fine for that plane, not sure about TS since I've not seen one fly with one.

Wow..I thought this thread had passed away a long time ago!

Well a update is in order I guess...I did purcashe the Four*60 and a week later bought a Satio 100 from the same guy.

So far not a single bad thing to say about that set up. MORE than enough power !

I fly this airplane with a ST 75 on it, and it flies ok. A 2 cycle 90 type will fly it great!!! As someone else mentioned, just use the throttle as necessary.......

Thats one thing I like about the four stroke...I feel ( at least to me.) That a four stroker is less likely to load up and quit after a 5 minute run at 1/4 -1/2 throttle.
My two strokes I alway felt the need to clear them out...

Hi all. I have a carl goldberg tiger 60 arf. my problem is I bought a magnum 60 2stroke. I almost did not made it in the air.
I was thinking of overpower, but my question was a 2 or 4 stroke.

I have a Four * 60 with a Thunder Tiger 91 four stroke. I am very satisfied with the combination. Take-off at less than half throttle. Good acceleration and throttle transition. Just a great match for the Four*60.[8D]

Ditto what JohnS just said. I have the same exact setup and 100% happy with it. Good luck and have fun.

Alright,
I was considering a thunder tiger 91 and a saito 100. the saito is 100 dollars more and not that much bigger. i was wondering if the TT 91 will infinitly hover the four*60 and pull out ok. i am willing to pay more if that is what it takes to be able to hover. but if the TT will do it, i will go with that!

anyone flying / flown the 4*60 on a lower displacement 4-stroke? Im wondering how it flies on a .72 4s or a .60 2s. Im building one now and I have a Saito .72 available to use. Problem is that's on the LOW end of the recommended engine range. I hear about people taking off at 1/2 throttle and hovering it with their .90s and .100s.
Now, I KNOW a 72 4s is not ideal! =) But I don't want to do vertical maneuvers, just enough engine to do some lazy aerobatics and not be (unsafely) marginal on power. I do build very light, so it won't be a clunker. Yes, I know I could pick up a 2s .70 for under $100, or a Magnum 4-s for under $200, but really I just don't have the $$$ right now. =)
-ron