Bearhawk Aircraft Bearhawk Tailwheels LLC Eric Newton's Builder Manuals Bearhawk Plans Bearhawk Store

Announcement

Collapse
No announcement yet.

Patrol Cruise Speed OLC

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • Patrol Cruise Speed OLC

    I am instigating a Cruise Speed & Efficiency OLC (On Line Contest) for the Patrol.

    Here is the deal. I don't have the fastest Patrol. I probably never will. But I search for improvement ideas. I also search for engine settings and altitudes that can attain higher speed "for bragging rights" but pursuing speed improvments positively effects efficiency and improve utility. If we have a contest then maybe I can learn something and improve my Patrol's efficiency. I hope someday say truthfully "It'll cruise 75% power at 150 mph." But faster would be better.

    So, this OLC is to show how fast a true STOL aircraft can be. It can improve our fleet's efficiency, fleet Owners knowledge base, rigging and speed modifications, so that the "normalized" speed of the fleet is raised.

    Rules:
    1) I am a fair benevolent dictator of this contest and will make up the rules until I step down or am dethroned. (I've not put much thought into the rules yet.... but the contest is now "ON".)
    2) Claims can be made via data logging, or photo (which can lie), but probably not mere unsubstantiated verbal claims. All claims must be able to be duplicated. Formation flying needs to be considered too. and we recognize pitot/static errors can play a role in accuracy of data.
    3) Claims that are challenged can be settled. I'll help establish the method of settling a challenged claim.
    4) Tires....I dont know what to do about comparing a 31" tire against a 6 x 6.00 tire.
    5) A person is to "argue" with the intent of reaching a higher truth inside themselves.
    6) Fuel Flow matters. This is a speed and efficiency contest.
    7) Our OLC will encourage efficiency thru a 6, 8, 10, and 12 gph classes.

    Right now I declare bdflies having the fastest Patrol at 153 mph at in the "12 gph and under class." I am probably wrong and desire this to be proved wrong. This is documented here.
    Well, sort of. My Patrol is a delightful plane to fly. Good short field performance, nice speed, excellent control authority and very predictable behavior.


    I'm thinking if we could learn more about taking our data and pushing it thru Flysto or something like that....well that would help us all better collect and crunch data. Useable Data is the foundation for learning and wisdom.
    Brooks Cone
    Southeast Michigan
    Patrol #303, Kit build

  • #2
    This is great Brooks! If you require two runs on opposite headings, you can mitigate most of the measurement error concerns.

    Comment


    • #3
      Originally posted by jaredyates View Post
      This is great Brooks! If you require two runs on opposite headings, you can mitigate most of the measurement error concerns.
      Fastest True Airspeed WILL be cornerstone event. I agree that measurement error will be an issue to navigate. Help me understand how runs in opposite headings mitigates measurement error when contender is measuring a True Airspeed data point. (Btw I just read my TAS on my Garmin G5. Round Dial a/c would calculate it from IAS. A Pitot Static system abnormality error would give all systems false data points.)

      It makes me think each contender, in pursuit of an Industry Best Practice, Truth and Justice, should do an airpseed accuracy check using GPS ground speed over a triangular course. Smack around the campfire just wont do!

      This topic will bring up great discussion on Justice as well as system and performance debate.
      Brooks Cone
      Southeast Michigan
      Patrol #303, Kit build

      Comment


      • #4
        I'm proposing that you fly the two opposing courses and average the ground speeds. That way pitot speeds have nothing to do with it. You are getting a proxy for TAS by using the two ground speeds, and removing the wind advantage by flying both courses. This isn't an accurate way to calibrate your airspeed indicator but it would work for a contest. There would need to be some data before and after the run to ensure no diving into the scoring run. Like 1 minute level, 1 minute of scoring data, reverse course, and repeat. What do you think?

        Comment


        • svyolo
          svyolo commented
          Editing a comment
          Agree 100% on GS.

      • #5
        Okay, I see it now. Today it was bumpy. I saw 8 kts variation due to thermals and sink. I also uploaded my first Flysto.net data from my Garmin G5. I have an average and the segment was 140 seconds. The Flysto.net will show altitude diving and climbing, ground speed, etc.
        Brooks Cone
        Southeast Michigan
        Patrol #303, Kit build

        Comment

        Working...
        X