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  1. Tuning Your Engine ...

    Tuning Your Engine http://www.rcuniverse.com/forum/newreply.php?do=postreply&t=11630980



    Tuning the engine is the number one most important aspect of running a Nitro Powered...
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    These gears can withstand a mild brushless setup....

    These gears can withstand a mild brushless setup. They're quite beefy.
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    Any specific reason?

    Any specific reason?
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    Most bearings have a circlip on the outer race;...

    Most bearings have a circlip on the outer race; holding the shield in. remove this and the shield will come out.
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    Duke chose mehanite for pistons and leaded steel...

    Duke chose mehanite for pistons and leaded steel for liners, on purpose as they have expansion coefficients that are nearly identical.
  6. Port size, timing and angle. Crank port timing...

    Port size, timing and angle. Crank port timing and duration.
  7. http://www.osengines.com/engines-airplane/osmg1510...

    http://www.osengines.com/engines-airplane/osmg1510/index.html
    The Con Rod is forged steel with a needle bearing lower end. Hence the ability to run on 50:1
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    No matter how much care is taken, however, the...

    No matter how much care is taken, however, the dismantling of mated parts invariably results in some degree of re-mating and consequent wear, and it is therefore never advisable, and should be done...
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    MJD, do you have a sharper image of the Big Otto?...

    MJD, do you have a sharper image of the Big Otto? I had one of these in the 1970's with an OK Cub 099 on it. I still have the engine and I would love to build another one.
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    Didn't Scientific make a combat plane for an .049?

    Didn't Scientific make a combat plane for an .049?
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    Carl Goldberg Li'l Satan.

    Carl Goldberg Li'l Satan.
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    I have a 1970's Enya .09 that has been run with a...

    I have a 1970's Enya .09 that has been run with a TF 8X4 since broken in, it still hand starts. I lost track as to how many hours are on it. A little varnished up but it runs well.
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    When I would heat treat 7075 0, We would go...

    When I would heat treat 7075 0, We would go through a heat treating process and when it was finished we would end up with 7075 T4. 0 condition would never give you T6 after heat treatment.
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    2024 T3 or 7076 T6 will work best for a piston if...

    2024 T3 or 7076 T6 will work best for a piston if you are machining it. You can normalize aluminum in a furnace at 920F. I used to anneal aircraft rivets in the furnace before driving them (used to...
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    The Savage will blow monkey chow on NIMH. It is...

    The Savage will blow monkey chow on NIMH. It is best run on LI-PO. I have a Stampede 4X4 and I replaced the 12 T motor with a 21 T motor. It is slower but I get up to 1 hour on the 3000mah battery...
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    I had one of these. It was the controll line...

    I had one of these. It was the controll line version. It had a venturi intake 10 mm across. I had to use crank case pressure to allow it to run. It was a screamer with an 8X6. You have to use all...
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    Neal you should know that in all two cycle...

    Neal you should know that in all two cycle engines, you do not want the oil to burn......ever! It serves two purposes, one to lubricate and two to carry away excess engine heat. It is two stroke 101...
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    I have used Morgan's Omega 10% with two ounces of...

    I have used Morgan's Omega 10% with two ounces of extra castor oil added. I have used this fuel in my T-Maxx 2.5 since new. I am on my 16th gallon of Omega on this engine and it is still going...
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    Don, please let me know how you make out. My only...

    Don, please let me know how you make out. My only complaint is the seven minutes run time with my mini. What Li-Po are you using? How much run time? I'm thinking of putting an 049 in mine with a big...
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    A bad day with a model diesel engine is better...

    A bad day with a model diesel engine is better than a good day with a glow. :)
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    Another thing to note is the rear disk rotor. It...

    Another thing to note is the rear disk rotor. It is die cast aluminum and the rear mating surface will eventually gall against the back plate. 33% castor in the fuel may eliminate this.
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    I have the 2.5 on a T-Maxx and I'm at the 15...

    I have the 2.5 on a T-Maxx and I'm at the 15 Gallon mark, I'm using Morgan's Omega 10% nitromethane. I don't know the life of the 3.3
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    The only real problem with the 3.3 is it has the...

    The only real problem with the 3.3 is it has the same connecting rod that the 2.5 cc engine has. If you try and get every ounce of power out of the 3.3, the rod will split down the length. The RB rod...
  24. In the 3 port system, I believe the third port...

    In the 3 port system, I believe the third port always opened later to provide the directional change needed for the loop scavenging effect. I also believe that the ST laminar port system it is more...
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    If the engine idles well the plug is fine. If the...

    If the engine idles well the plug is fine. If the thing stalls upon opening the throttle, lean in the high speed needle 1/4 turn, it should improve. You will find that you think the engine is running...
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