I'm currently waiting for a tiger 60 arf and I want to know the smallest and largest engines to install to get good perfermance out of the plane. I realize that most people are stating that the saito 91 and 100's are the way to go. Why is it that people feel they need to install a saito 91 or larger into a plane that only calls up to a 80 four stroke. Are the majority of these post made by those attempting 3D with a tiger 60. I was planning on putting a saito 72 in mine and I would like some honest feedback concerning this conbination. I am not saying everyone who has a 91 or 100 in their tiger won't get great performance. Hell, with a 91 or 100, you should get GREAT performance. But what about the performance when powered by smaller engines. I have a saito 72 and a saito 100. My saito 100 is in my UCD 60, which I enjoy in that plane. I just hope I'm not advised to take that engine out of a 3D plane to put into a plane a step above a trainer. Lets keep it real everyone, and honestly voice your opinion.
Bigger doesn't always mean better.[sm=bananahead.gif]

A friend has an OS 72 in his and it flies great.

A 91 or 100 running at part throttle will give the same performance as a 72 at full throttle, but use less fuel, make a lot less noise and last a lot longer.

You will probably have to add a lot of dead weight to the nose of that Tiger to balance it with the 72. That means the extra weight of the bigger engine just replaces the dead weight you would have need with the 72.

Bottom line: You have the extra power of the larger engine available if you need it to pull you out of trouble, with no downside at all. (Except the higher initial cost of the engine of course.)


The 72 will fly the Tiger 60, but you'll be at full throttle all the time and you'll have no reserve power to pull out of a botched landing or such. Put the biggest engine you can in it without adding tail weight and learn throttle control. You'll be much, much happier.

Jim

I have a tiger 60 with an OS 61FX on it and I fly it at half throtle, this combo works great for me. One guy has one with an OS 91FX WAY to much power, anyways put a 61FX on it and go at it.


just my opinion

Like I said, the 72 will be fine

i got a tower 75 in mine two stroke not enought power

evfast:

This is a serious question. Not trying to put you down at all, just trying to understand where you are coming from. Please define "too much power".

Jim

Hi. FWIW, I think you would do well with the K & B 61, either the Twist or the updated version. These are some of the most powerful 61s on the market, VERY light and VERY fuel efficient. If you prefer 4s, then go with the Magnum 80s. These are VERY powerful engines that are "tweeners" (smaller than 91s, almost as powerful and LIGHTER). The OS 72 is good as well, just a little "light in the butt " on power for a plane this size, although they will give it enough power to fly. The OS 61Fx is ok too, but the K & B tops it in sheer power output, and is just as user friendly. Also, you can't beat the price from MECOA.

JRF, no problem.

For the type of aircraft the Tiger 60 is a 91FX in my opinion is to much power. Remember its not a pylon racer, I understand you can probably prop it the right way and it will be fun. But in my opinion the 61FX is plenty for me, I have seen many others with the same combination and there all seem to like it.

My T-60 with my Os-61FX 2 stroke flys well and does everything I ask, its a great plane when I teach people how to fly with it and for me its a great second plane.

anyways hope this answer your ????

later

If you're flying the Tiger 60 as a "second plane", one step up from a trainer, sport-flying with the occasional loop and roll, then that's the kind of flying model companies base their engine recommendations on. However, the Tiger 60 is more than capable of flying serious aerobatics, with lots of vertical components, and for this kind of flying more power is pretty much a necessity.

If you're inclined to go four-stroke, a Saito 72 will be great for sport flying, but a Saito 100 would be in order for the aerobatic stuff. Keep in mind that aerobatics are best flown with constant throttle management, and wide open throttle only on vertical manuever segments. Other than that, as the man says, a bigger engine cruising at reduced throttle will make less noise, burn less fuel, and be kinder to your airframe than a smaller engine at full throttle.

If you want to consider two-stroke power, it's almost a waste of money to buy a 60 size engine these days, because something like the Magnum 91 XLS weighs the same and mounts the same as a 60, but with significantly more power. Same deal with the throttle--cruise at 2/3 throttle, use full throttle to punch up some altitude. It really is marvelous to pull up into a big square loop or a big diamond loop in a Tiger with 90 size two-stroke and not have to feel your engine straining. This is not over-powered, this is simply adequate to power-gobbling maneuvers.

Whatever engine the model will carry without getting over 25 oz/sq in of wing area (for a "60 size" model), more power is always better. Thrust of 1-1/2 to 2 times the model weight is the norm for aerobatic flying. Pulling an 8 lb model straight up with the inevitable drag adding at least a few more pounds of weight equivalent, 12 pounds of thrust is about enough, 15 pounds certainly not too much.

I built my Tiger 60 from the kit and installed a OS 91 Surpass II-P and it was a sweet combination. It would pull to the moon or putt around all day on a 16oz tank. [8D]