2 or 4 Stroke  
View related threads: (in this forum | in all forums)

Tower Hobbies
Enter up to 4 keywords or Tower stock numbers
Logged in as Guest



Users viewing this topic: none
  Printable Version
More Resources on the
Little Toni
  • Read Full Review
  • See User Ratings
  • Suggest Compatible Equip.
  • Check for Retailers
  • Discussions on this Product


    • All Forums >> Glow Engines, Gas Engines, Fuel & Mfg Support Forums >> Glow Engines >> 2 or 4 Stroke
    Page: [1]

    Login
    Message << Older Topic   Newer Topic >>
    2 or 4 Stroke - 6/1/2004 6:12:49 PM   
    pit_basher


     

    Posts: 131
    Joined: 2/19/2004
    From: Green Cove Springs, FL, USA
    Status: offline     		Im buying a Little Toni from GP, the manual says that you can use a .61 2 stroke or a .91 4 stroke. I have no experience with the 4 stroke. Can somebody explain to me the difference between both? Is the .91 4 stroke the same size as the 2 stroke .91? Any help would be appreciated.

    _____________________________

    If you cant stand behind our troops, Please stand in front of them
    AMA# 827136
           Post #: 1

    RE: 2 or 4 Stroke - 6/1/2004 7:14:23 PM   
    MinnFlyer



    Posts: 19670
    Joined: 4/22/2002
    From: Willmar, MN, USA
    Status: online     		I don't do any racing, but given a choice between a 61 2-stroke, or a 91 4-stroke, I'll go with the 4-stroke every time.

    The 61 will give you more RPM, but the 91 will swing a bigger prop, and be way better in fuel consumption.

    And then, there's always that great 4-stroke sound!

    _____________________________

    Mike B.
    AMA# 42400 www.gettingairborne.com

    "Those are my principles. If you don't like them, I have others." - Groucho Marx

    (in reply to pit_basher)
           Post #: 2

    RE: 2 or 4 Stroke - 6/1/2004 7:58:14 PM   
    Richard L.



    Posts: 8775
    Joined: 7/28/2002
    From: Redmond, WA, USA
    Status: offline     		Ditto. I will always go with a four stroke. No matter what muffler you use on a .61 2-stroke, it will still sound like crap.

    (in reply to MinnFlyer)
           Post #: 3

    RE: 2 or 4 Stroke - 6/1/2004 8:01:16 PM   
    Sport_Pilot



    Posts: 7728
    Joined: 1/21/2002
    From: Acworth, GA, USA
    Status: offline     		I prefer two strokes, but not on scale, just sounds dumb. Still proped properly the four stroke will go almost as fast. If a YS it will be faster than most sport two stroke engines, only really serious 2 strokes such as a Jett .91 would be faster than a YS.

    (in reply to Richard L.)
           Post #: 4

    RE: 2 or 4 Stroke - 6/1/2004 8:20:19 PM   
    William Robison



    Posts: 20269
    Joined: 11/10/2002
    From: Mary Esther, Florida, FL, USA
    Status: offline     		Two responses, but only one gave a partial answer to the questions.

    In most cases, given the same displacement, a four stroke engine will be larger than a two stroke. Exceptions are the sleeve valve 4s engines such as the RCV, and the HP "VT" series using a rotary disc valve.

    For sheer horsepower, the 2s engine is the winner at a given displacement. But we usually don't fly our planes fast enough to take advantage of the power, in the real world for any given 2s engine there's a 4s that will give equivalent performance.

    It all comes down to your choice. The overall impression of a plane flying is more realistic with a 4s engine, but the engine price is higher also. Repeating myself, your choice.

    Bill.

    _____________________________

    Real Airplanes have Two Engines
    AMA 25139 - More than 40 years.

    (in reply to Richard L.)
           Post #: 5

    RE: 2 or 4 Stroke - 6/1/2004 8:26:14 PM   
    Sport_Pilot



    Posts: 7728
    Joined: 1/21/2002
    From: Acworth, GA, USA
    Status: offline     		Ahhh! Bill the Little Toni is a scale RACER! It can easily take advantage of a two stroke. And by the way the two stroke has an advantage of both power and torque, its only disadvantate being the larger muffler. Now this isn't the case with many two strokes because they are timed for higher RPM. The only real advantage most four strokes have is a neat sound.

    (in reply to William Robison)
           Post #: 6

    RE: 2 or 4 Stroke - 6/1/2004 8:35:51 PM   
    Matt Kirsch



    Posts: 7043
    Joined: 7/5/2002
    From: Rochester, NY, USA
    Status: offline     		In the real world, a 2-stroke .61 and a 4-stroke .91 are "equivalent." That is, the 4-stroke .91 is generally used in the same types of planes where a 2-stroke .61 would normally be used.

    Displacement wise, a 2-stroke .91 and a 4-stroke .91 are the same. However, the 2-stroke has a bit of an advantage in horsepower.

    Whether you go 2-stroke or 4-stroke is a matter of personal preference. I can do without the pleasant putt-putt noise of a 4-stroke for the extra cost, weight, and maintenance involved.

    (in reply to Sport_Pilot)
           Post #: 7

    RE: 2 or 4 Stroke - 6/1/2004 8:43:10 PM   
    William Robison



    Posts: 20269
    Joined: 11/10/2002
    From: Mary Esther, Florida, FL, USA
    Status: offline     		Sporty:

    You're right. The "Little Toni" is indeed a scale racer. So let's really be scale and fly at a scale speed. Doing that we can't fly any faster than 40 mph. Granted, it wont "Look" scale, but it is. Wont fly very well at that speed either.

    If you are planing to run the plane in a "Scale" midget race, make it honk with a Jett 90 engine.

    But if you are out for sport/enjoyment any Saito from 80 to 92 will fly the plane around 85 mph level, and that does "Look scale." And sounds good too.

    Bill.

    _____________________________

    Real Airplanes have Two Engines
    AMA 25139 - More than 40 years.

    (in reply to Sport_Pilot)
           Post #: 8

    RE: 2 or 4 Stroke - 6/1/2004 8:46:22 PM   
    Sport_Pilot



    Posts: 7728
    Joined: 1/21/2002
    From: Acworth, GA, USA
    Status: offline
    quote:

    In the real world, a 2-stroke .61 and a 4-stroke .91 are "equivalent."


    I agree, the four stroke is the right choice, and can easily move it at the scale speed. But it could also be fun with a two stroke at maximum speed. Not the plane I would chose for that, but I won't knock how someone else gets their kicks.

    (in reply to William Robison)
           Post #: 9

    RE: 2 or 4 Stroke - 6/1/2004 8:52:49 PM   
    Sport_Pilot



    Posts: 7728
    Joined: 1/21/2002
    From: Acworth, GA, USA
    Status: offline
    quote:

    In the real world, a 2-stroke .61 and a 4-stroke .91 are "equivalent."
    No that the artificial rule making world. Well Ok the rule doesn't exist anymore but the old pattern rules limited the engines to 10 cc two stroke or 15 cc four stoke. So the four stroke manufactures tried hard to make their engines to weigh the same as two stoke .61's. The two stroke manufactures tried hard to make up with more power so they got heavier. Only recently have two stroke manufactures worked to reduce weight. The newer .91 two strokes weigh little more than the .61's they are patterned after. Not much more than the .91 four strokes either and with a lot more power.

    (in reply to Matt Kirsch)
           Post #: 10

    RE: 2 or 4 Stroke - 6/2/2004 12:57:52 AM   
    Don M.



    Posts: 1838
    Joined: 3/2/2004
    From: Halifax, NS, CANADA
    Status: online     		To me it all comes down to "realism in flight", that's why I fly "miniature aircraft", no contest, 4-stroke all the way. I have an OS 1.60 2-stroke engine in a Giles which has to be the best working engine in all respects, that I have ever owned, but everytime I fly the plane I wish it had a 4-stroke in it.

    Yes Bill, they all run quite well on straight syn. fuel.

    (in reply to Sport_Pilot)
           Post #: 11

    RE: 2 or 4 Stroke - 6/2/2004 12:52:02 PM   
    Sport_Pilot



    Posts: 7728
    Joined: 1/21/2002
    From: Acworth, GA, USA
    Status: offline
    quote:

    To me it all comes down to "realism in flight",


    What is real about hovering on the prop. Most of my fellow modelers seem to think a four stroke is the way to go. But many of my "equivalent" 2 strokes can pull the same prop with more RPM. Four strokes do sound more real, but realistic speeds is more of a power and prop choice.

    (in reply to Don M.)
           Post #: 12

    RE: 2 or 4 Stroke - 6/2/2004 3:02:13 PM   
    SMALLFLY-



    Posts: 2150
    Joined: 12/9/2001
    From: Evansville, IN, USA
    Status: offline     		powering this plane is no different than the thousands of GP shoestrings that are allready out there. IMO the OS 91fx or the magnum XLS 91 2 stroke with a slimline pitts is the way to go and it is what I had on my shoe when they first came out. The pitts on the 91 doesnt sound bad at all and with a 13x8 prop you will get vertical to the moon and some pretty good speed. It is not going to be anywhere near as fast as a quicky 500 but it will be quick. This plane will fly fine and dandy on a 91 or 100 4 stroke but for less than 200 bucks (mag 91 xls and pitts) you will have a lightweight powerful solution

    (in reply to pit_basher)
           Post #: 13

    RE: 2 or 4 Stroke - 6/12/2004 4:56:54 PM   
    pit_basher


     

    Posts: 131
    Joined: 2/19/2004
    From: Green Cove Springs, FL, USA
    Status: offline     		But, Its theres any specific maintenance other than cleaning it and putting after run? How about tuning, how different is it from the 2 stroke?

    _____________________________

    If you cant stand behind our troops, Please stand in front of them
    AMA# 827136

    (in reply to SMALLFLY-)
           Post #: 14

    RE: 2 or 4 Stroke - 6/12/2004 6:46:22 PM   
    yard-dart



    Posts: 927
    Joined: 3/6/2002
    From: West Monroe, LA, USA
    Status: offline     		How different is the two stroke compared to the four? As far as upkeep, there's very little difference. Once in a blue moon you may have to adjust the valves, which is very easy and only takes about 5-10 minutes. Other than that, it's like every other engine, you just fuel it up and go.
    The biggest difference between the two is that the four stroke sounds much more scale-like. It swings a larger prop which also gives the plane a much more scale appearance. To me, I'd go four stroke. There's absol