W&B for Q2 with 75hp Revmaster (LS Canard)
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Joe Hood <joe.hood@...>
Oh, from Sanjay to boot (same EAA chapter). Thanks! On Fri, Jun 12, 2020 at 20:22 Michael <dunningme@...> wrote: Couldn't agree with everyone more; don't trust it!!! |
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Michael Dunning
Couldn't agree with everyone more; don't trust it!!!
The last three paragraphs of this article should give you some idea on the process (just ignore the numbers): Q-talk 143 - It's Alive! -- -MD #2827 (still thinking about planning on visualizing how to finish building) |
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I totally agree with everything that Paul just said. It is easy-peasy if you have a plumb-bob, a carpenter’s square, a tape measure, and three scales. Go for it.
Cheers, Jay
From: main@Q-List.groups.io <main@Q-List.groups.io> On Behalf Of Paul Fisher
The way to find the pilot/copilot arm is to climb in and weigh the plane again. A little algebra will let you calculate the arm. It's way more accurate than trying to measure a center of mass of a reclined pilot. I did the same thing for each fuel tank and baggage.
Once you have the plane leveled on the scales it's just a matter of taking multiple readings as you load up the plane. From there it's just math. The only measuring you need is to find the exact location of each of the landing gear relative to the datum.
Since each plane is hand made, you should NOT depend on anyone else's arm lengths.
Just my opinion.
Paul Fisher Q-200 N17PF
On Wed, Jun 10, 2020, 07:22 Joe Hood <joe.hood@...> wrote:
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Paul Fisher
The way to find the pilot/copilot arm is to climb in and weigh the plane again. A little algebra will let you calculate the arm. It's way more accurate than trying to measure a center of mass of a reclined pilot. I did the same thing for each fuel tank and baggage. Once you have the plane leveled on the scales it's just a matter of taking multiple readings as you load up the plane. From there it's just math. The only measuring you need is to find the exact location of each of the landing gear relative to the datum. Since each plane is hand made, you should NOT depend on anyone else's arm lengths. Just my opinion. Paul Fisher Q-200 N17PF On Wed, Jun 10, 2020, 07:22 Joe Hood <joe.hood@...> wrote:
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If I remember correctly the datum is 14" in front of the firewall. But it has been years since I did weight and balance so someone help me out here.
Bruce ---------- Original Message ---------- From: "Joe Hood" <joe.hood@...> To: "main@Q-List.groups.io Group Moderators" <main@q-list.groups.io> Subject: Re: [Q-List] W&B for Q2 with 75hp Revmaster (LS Canard) Date: Wed, 10 Jun 2020 08:22:23 -0400 Thanks! I can only imagine, over time, the weight has changed. I've seen a couple different numbers for arm distance for the pilot/co-pilot but that should be a matter of measuring from the firewall.
On Tue, Jun 9, 2020 at 4:22 PM Jay Scheevel <jay@...> wrote:
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Joe Hood <joe.hood@...>
Thanks! I can only imagine, over time, the weight has changed. I've seen a couple different numbers for arm distance for the pilot/co-pilot but that should be a matter of measuring from the firewall. On Tue, Jun 9, 2020 at 4:22 PM Jay Scheevel <jay@...> wrote:
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I would suggest just doing the W&B yourself. I have seen too many that were incorrect or out of date, and this way you know it is correct. It is easy to do if someone on your field has some calibrated scales.
Cheers, Jay
From: main@Q-List.groups.io <main@Q-List.groups.io> On Behalf Of Joe Hood
Trying to get weight and balance from the former owner (still working on it--what I have is empty weight is 610). I've seen Martin Skiby's Q-200 W&B but that's 100hp versus the Revmaster with the bigger heads at 75hp.
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Joe Hood <joe.hood@...>
Trying to get weight and balance from the former owner (still working on it--what I have is empty weight is 610). I've seen Martin Skiby's Q-200 W&B but that's 100hp versus the Revmaster with the bigger heads at 75hp.
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