Engines...
 

I need help, I'm looking to buy a new engine for a Pt-60 trainer by
great planes (requires a 60 engine). My options are a O.S. for about
CDN$190.00 (http://www.gpmd.com/cgi-bin/wgpinf100p?&I=OSMG0561) or a
super tiger for about CDN$100.00
(http://www.supertigre.com/engines/supg0161.html), unfortanitly I'm new
to engines and the guys in the store seem to lead me nowhere but in to
confusion (good way to get me to get the O.S.) any ways was hoping
someone here could tell me if they have heard of super tiger and what
its record is for breaking in, starting (hot and cold) and its general
running and maybe its reliability and its longevity in comparison to
other engines and specifically to the O.S.

RE: Engines...
 

Super Tiger engines seem to get a bad rap. I only have one and it runs good but I have heard many stories from people that have had bad luck with them.
OS, Thunder Tiger Pro and even the Tower Hobbies engines have good reputations. My personal favorite is the TT Pro.

RE: Engines...
 

I have a Goldberg Tiger 60 which is about the same size as your PT60 only low wing. I had an OS 61 SF pulling this plane around and it was just fine. I got it used from an estate sale of one of our members that had died. I got it cheap.. $25.00 US. But, the engine had a bad main bearing. It was not bad enough to not use the engine, but you could clearly hear it at times. So, I flew it for a while but eventually removed that engine in favor of a Super Tigre 75. This engine was fine, although it clearly was not the quality of the OS 61 SF. It leaked fuel because the needle valve fit was not that great. In the mean time, I picked up a replacement bearing for the OS.

Also, after a few flights, the internal parts of the muffler, the baffles, came loose and it made a ringing noise when the engine was running. I called Super Tigre reps and they sent me a new muffler right away. Great service. However, after a few flights, this muffler also came apart on the inside. When I called them back, they suggested that I install a tuned pipe, so I ordered a Macs pipe and header with extension and installed that. Well, the carb still leaked fuel a bit, but what a power house that engine turned out to be.

Soooo... you have two choices that are good ones. I do like my OS engines, I have 2 46's., one 50, one 61, and three 1.20 AX's. So, you can clearly see my preference. And if you get a Super Tigre 75 for instance and you have to go the route I did with the tuned pipe.. well, you will be right up there with the cost of the OS. Your choice, and you may not have the muffler problem that I did, they may have addressed that and fixed it. The fuel leak... well, it only makes a bit of a mess that is no more difficult to clean than the oil on the side of the fuselage and all over the wing and tail surface just like any other model engine.

Good luck with your choice. Hope the above information helps you make an intelligent decision.

DS.

RE: Engines...
 

i've always had good luck with O.S. engines. There is a reason they are so popular. If you were asking if O.S. is worth the extra money, I vote a resounding "Yes'. In actuallity, cost wise, they are middle of the road in cost, as there are far more expensive engines out there.

RE: Engines...
 

Over the years I've also had good luck with OS. I've found Supertigre to be less user friendly.

RE: Engines...
 

Super Tigers usually require changing the position of the carb spray bar to get them to run half decent. The throttle barrels also like to suddenly jam in one position leaving you with no throttle control. I won't recommend them! Soooo, the OS engines are easy to adjust and relible but the 61 is a weak engine for its size and expensive. Thunder Tiger are a good engine and a fine choice but the best engine (imo) for this size is to go the the Tower Hobbies and pay $10.00 more than the 61 size and get the Tower Hobbies 75. Fantastic engine in this size regardless of the price. It takes a few more tanks to break in than the OS but its worth it! [8D]

RE: Engines...
 

i run the os 61fx on my daughters pt60 and that engine has more than enough power.i like the tt pro 61 also,the tt pro weighs 3oz more or so than the os fx but with this type of airplane i don't think it much matters.my daughter learned to fly on her pt60 it has good tendency's,i built her's and put less dihedral into it IMO handles a bit better.

RE: Engines...
 

There are those that believe in the super tiger engine just as much as those that love the OS. There do seem to be more OS followers out there though. My personal experience is when I first learned to fly I had a Sig Cadet MkII with a Como .40. I was told at the time that Como was made by super tiger. My problem was when it run, it run great. Some days you just couldn't get it to run for no aparent reason at all. My next engine was an OS .61 and I never had a problem with it.

RE: Engines...
 

I've had about equally good and bad luck with O.S. and Supertigre. Which is why I now buy exclusively Supertigre. The two I've bought most recently have run flawlessly. They do require a decent break-in period, but they perform well even when running smoky-rich.

RE: Engines...
 

In all fairness, Evolution should be mentioned. I have no experianece with them, so maybe someone else can chime in.

RE: Engines...
 

Evolution are not not cheap price wise and are a mixed bag both running and reliability wise. The gimmick is that the are supposed to be factory run in and adjusted and have metel tabs to keep you from adjusting the needle valves outside a proper operating range. Fact is they don't act like they have had any running time and the so called "Factory settings" may be good or may be so far out that the engine either won't even start or it won't stay running for more than a few seconds. This is no different than other engines except that the metel tabs may be in the way to adjust the needle valves to where they are supposed to be to get the engine to run properly. I have the 61 size and ordered a new TH 61 carb to replace the Evo carb to try and get this beast to run properly. As it is the engine has on occasion run well and with strong power but it is very intermittant and very unreliable. When you rev up you can see the needle valves start to turn from vibration which changes the settings! If the engine doesn't run well with the TH carb then I will be chucking the engine and keeping the carb. So far it has been a big dissapointment! [&o]

RE: Engines...
 

Just a few questions for you if I may. I was wondering if you had any trouble in the initial breaking in of your super tigers or in the setting of the carburetor, if you have had needles come loose threw vibrations or any other mis happenings, as one person was saying they had to change there carburetor for an O.S. one and the the glow plug a few people have said would need a change, I'm just wondering after all these changes what is your final cost and for a beginner is it worth the trouble of trying to learn about your engine at the same time you have so many other things your trying to work out. I'm really looking to have a good start at flying and maybe have problems and save on money later or am I being paranoid about the super tigers ?? Hoping for your answer.

Dave

RE: Engines...
 

In general, if you follow the instructions that come with the engine, you won't have any trouble with an O.S. or Supertigre. They both come with the low-end set by the factory, and will start and run well with the top-end set reasonably close (about 3 turns out from all-the-way in). Supertigres do seem more sensitive to the low-end setting, and I've found you can't get really smooth throttle response until they're fully broken in (1-2 gallons of fuel). That may give O.S. the edge in user-friendliness. If you can afford the extra bucks, the O.S. might make a better "first" engine.

RE: Engines...
 

I do not have 1st hand experience with them, however, Super Tigre engines are alleged to be very good and reliable ONCE THEY ARE BROKEN IN. There are a few issues with the position of the spray bar in the carb, but that is all. The engines are on the heavy side and do not really like anything but 5% nitro fuel.

As an alternative, there are 2 makes I do have 1st hand experience with and can highly recommend. Thunder Tiger and Evolution engines. Both are user friendly and quite powerful.

By user friendly I mean:

99%+ run well right out of the box.

No known issues with either engine.

Minimal breakin needed (Evolution engines are supposed to be broken in at the factory).

Run well on 10% nitro.

Once the engine is dialed in (high and low speed needles set), little if any "fiddeling" required (If you want to know about "fiddeling", check out the YS engines )

RE: Engines...
 

In reference to figuring out a good engine to get, I was in the same boat for awhile. I hav ebeen running the Nexstar which comes with the OS 46FX and have no problems with it at all. Since I interested into the warbirds I decided to go after the P-51 Mustang and build the system around what I wanted, new radio and engine. So I talked with alot of the guys at the club who run different engines and found that the Evolution which comes with the Mustang RTF version is not that reliable. The Evolution has a bad tendency to stall out in flight and hard to start in weather below 0. Since up here in Canada we like to do a lot of winter flying I have seen that the OS engines handl ethe cold better and start alot easiear. I have opt for the OS engine on the planes I am going to get , since using them I find them easiear to adjust, more realiable them other engines and do not stall out like others. Do more research on the engine you are looking for, go to manufacture sites and talk to the club members. Most members will steer you in the right direction for an engine since they have had alot of experience in this field. I am always talking to our members about what to d and what to try. Only my thought but if you wnat reliable, stay with the OS engines, pay the extra dollars and you will have a good engine you can use in another plane when you want to advance on to the next level.

RE: Engines...
 

I have run BOTH Super tigre and OS for years. the two supertigres 45 's have run FLAWLESSLY & I mean FLAWLESSLY for a very long time.supertigre engines are not overweight by any means . if you think that, I wonder what you'd say about HB , which are. recommending a pipe , unless you need lots of power is bad advice & useless unless you know how to set it up. OS has a great ,if sometimes inflated, reputation. parts are easy to find, even for older models. they will run on FAI fuel ok. I have also run Thundertiger pro & HB with great results. you may want to check out MECOA engines. site.

RE: Engines...
 

Hi

I have several OS and several super tigre engines, i think in general the os seem to be more reliable and easier to set up. although i have super tigre engines that have been very reliable.

A slight prob with the super tiger is how easily the manifold breaks in a crash.

You havn't really got a comparable super tiger to the fp or la range of os engines but if you want similar power to the ball raced os's for a much lower cost the super tigers are good value.

Simon

RE: Engines...
 

I like my evo last 4 tanks of fuel trough a .40 had one dead stick (coimpletly myfault... did not richen the micture out and the tempatur fell drmaticlly since the time i had used it before.) starts easy with a chicken stick .


As far as runnnign it in you should still do it on the ground. i have never had any valve leaking isus (needle valve) if the lil mettal bars are in the way well stop complaining about them and just bend them up noot that big oof a project grab some needle nose pliers and bend them upp and tune the engine..

RE: Engines...
 

I would suggest go for

ASP .61 ABC Series 3

SPECIFICATIONS:

Engine Type: 2-Stroke
Displacement: 0.610 cu. in.
Cylinders: 1

General Specs:
- 1 cylinder
- Displacement: 0.610 cubic inches
- Bore: 0.945 (in.)
- Stroke In: 0.866 (in.)
- Low RPM: 2000
- High RPM: 18000
- 1.750 bhp @ 15000 RPM
- Weight (no muffler): 21.56 oz.


Applications:
- Competition Airplanes
- Pattern/Aerobatics
- Scale
- Standard Airplane
- Sport

Street Price:
$104.00

Have a good day and safe flying

Mody

RE: Engines...
 

armody, do you have one of the ASP 61 engines? I was wondering how the larger ASP engines run. I have 2 ASP 52S engines and they are fantastic!! :D

RE: Engines...
 

Hi Fatsky,'

Well, unfortunately I don't have 61 sized ASP, but I do have a German made 61 sized engine, it has black colored Perry Carb, and I'm still unable to recognize that engine. Im gonna post a pic of that engine here, probably you'd recognise it. Eversince I found a used engine of ASP which was almost new, I became fan of ASP :D, its really great engine. Im using 10x6 prop on my ASP .46, as I have been told to use 11x6. I don't know larger props increase RPM's or decrease, also clarify it. Fatsky, Im also looking for a second plane of mine for my 61 size engine? and I wanna make the plane for myself, as I never built a plane and I want to build it one for me. Would you be able to send me the plan for cloud dancer or any 60 size plane which would help me making the 60 size plane. If you have, would be kind enough to send me

Thanks and happy flying

Mody

RE: Engines...
 

You left out a good cheap engine. The Tower 61 and 75 are excellent for the money as are Thunder Tigers. Os 61's would be a good choice if you can spend a little more. From what I have seen of the Super Tigres over the last two summers [as in actual hands on experience] I would leave them alone unless you want to spend more time fiddling with them instead of flying.
Fred

RE: Engines...
 

armody, for a 46 size engine you can use either a 10-7 or go to either an 11-5 or 11-6 prop. Going smaller than an 10-7 prop will allow the engine to rev higher but won't give you much extra pull. For most planes the 11" props will work better. As far as sending the plans for a Cloud Dancer, I have the 60 size which is fairly large plane. I have the various sections cut out from the sheets and would have to take them down to Office Depot and copy them. They are very large and it would be cheaper if you just ordered the plans yourself. Its$11.00 for the set. I can make an outline for my modified rudder if you do decide to build. [8D] http://www.rcmmagazine.com/store/sto...fUFzoU7CU94313