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Thread: Tuned Briggs & Stratton 'Rampage' engine - power figures etc

  1. #9
    Very active > 100 posts Club Member Philip's Avatar
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    Default Re: Tuned Briggs & Stratton 'Rampage' engine - power figures etc

    Works ok with Firefox, more importantly its good to see some real world testing of these engines. 50+hp at 5000rpm is a good result as is that flat torque curve.

  2. #10
    gaz
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    Default Re: Tuned Briggs & Stratton 'Rampage' engine - power figures etc

    I am in the same boat (IE9) so can't read the report. There are also a few who read this forum who are on 'works' computers and will be unable to install alternative browsers.
    Ivan, any chance you could attach the report as a pdf to this thread? many of us would love to read it.

  3. #11
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    Default Re: Tuned Briggs & Stratton 'Rampage' engine - power figures etc

    a 50Hp quiet reliable 4 stroke with bags of torque - would love to race one against F3 F50 but it would currently be classed as F1 could a trial be done ?

  4. #12
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    Default Re: Tuned Briggs & Stratton 'Rampage' engine - power figures etc

    Its definitely something that should be looked into Tony, it would make F50 more sustainable.....
    Quote Originally Posted by broad5186 View Post
    a 50Hp quiet reliable 4 stroke with bags of torque - would love to race one against F3 F50 but it would currently be classed as F1 could a trial be done ?

  5. #13
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    Default Re: Tuned Briggs & Stratton 'Rampage' engine - power figures etc

    i agree Russ - i've often advocated a 50Hp formula, F50 was named as a 50 Hp formula not a single engine formula - the closeness of the F3/F503 challenge race at Jakes showed how close it could be

    the argument is you can't measure horsepower but you can easily measure thrust and there's only so much thrust 50Hp can produce so have a sensible thrust limit set with random checks as craft come in from races or go onto the start grid

    certainly sustainable and ticks the green box too and even an option for endurance

    good work Ivan looking forward to seeing it in a craft

  6. #14
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    Default Re: Tuned Briggs & Stratton 'Rampage' engine - power figures etc

    Hi all, try again if you'd like to see it. There was a compatibility issue with our blog and IE, now sorted I hope, try the link.

    Russ has spoken to Chris daly about the possibilty of using one of these engines for trialling in F503, whilst not born as a race engine - it's certainly interesting. We would need somebody to provide a competitive hll of course! Russ & Gary from flying fish will be running one in formula ER in June as well.

  7. #15
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    Default Re: Tuned Briggs & Stratton 'Rampage' engine - power figures etc

    F50 was named as a 50 Hp formula not a single engine formula
    is not quite true. In fact, it was first envisioned as Formula 500, as in 500cc.

    the argument is you can't measure horsepower but you can easily measure thrust and there's only so much thrust 50Hp can produce so have a sensible thrust limit set with random checks as craft come in from races or go onto the start grid certainly sustainable and ticks the green box too and even an option for endurance
    I certainly agree with this! You only have to allow for a variance in efficiency and thrust disc diameter.

    good work Ivan looking forward to seeing it in a craft
    and I definitely concur with this one!

    Bob

  8. #16
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    Default Re: Tuned Briggs & Stratton 'Rampage' engine - power figures etc

    Perhaps rather than a thrust limit, where any spare thrust could be used as lift, a max fan speed. Perhaps if this was quite slow it would favour the heavier 4 stroke ( different speed for different no of blades ) this would help with noise and development,

    Just a thought

    Duncan

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