Performance Charts

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andy
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Performance Charts

Post by andy »

A lot of us have wished for Maule performance charts. Other than the Lycoming engine performance chart for the O-360-A/C series that I posted some time ago, I haven't found any. Since the Maule pilots on this forum know a great deal about Maule performance, I propose that we try to construct and improve some performance charts based on our experiences. It's kind of like the wikipedia approach to Maule knowledge transfer.

Here's a link to one that I constructed for my 1986 MX-7-180. This one maps takeoff distance, climb rate, landing distance and weight to density altitude. The 1700 lb columns use a 13% increase in takeoff distance, 7% decrease in climb rate and 2% increase in landing distance per 1,000 feet of density altitude. These are standard percentages for a constant speed prop that come from FAA pamphlets and mountain flying publications. I used 500 foot altitude increments to reduce the need for interpolation, although it makes a larger table. I added the columns for 200 pound increments in weight up to 2,500 pounds based on an estimate of a decrease in performance of 10% per 200 pounds of additional weight, so at 1900 lbs there's a 10% reduction and at 2500 lbs there's a 40% reduction. I'm sure our collective experience can improve these estimates.

http://webpages.charter.net/ameranda/av ... rmance.pdf

Since everything in the first chart is based on density altitude, here's a standard chart to convert pressure altitude and outside air temperature to density altitude. You can also use an E6-B of some kind to calculate it, of course. I find that it's easier to look it up on a laminated sheet that I keep in the airplane.

http://webpages.charter.net/ameranda/av ... titude.pdf

It would be great if we could construct similar performance charts for different Maule models, recognizing that there are additional factors like pilot experience, wind, engine condition, CG, etc. that affect aircraft performance.

I put these in .pdf format in case you don't have Microsoft Excel, but if you want the Excel version here's a link to an Excel workbook containing two worksheets that have the tables:

http://webpages.charter.net/ameranda/av ... rmance.xls

Andy

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Post by aero101 »

I've got an MX7-180A and those numbers look pretty good, maybe a little conservative, but certainly close enough to help and and considerably more then Maule gives you... NICE!!
Jim
http://www.northstar-aero.com

Giving money and power to government is like giving whiskey and car keys to teenage boys.

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Post by Tomkatz »

Andy,
I just down loaded your density alt. and performance info. I want to thank you for sharing this usefull data. I very much appreciate your efforts and selflessness.
Take care and agian Thank You! :wink:
Tom Katz
Tom K.

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Post by iceman »

test
Iceman

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Post by RobBurson »

When I got my M7 I just kept using the book I had for the rental Cessna 172. Good safety margin built in.

I have since put that book back on the shelf.

Rob

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andy
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Post by andy »

Glad you could use the charts. We need performance charts that are specific to different Maule models. Takeoff distance and rate of climb with a M4 or M7-235 is bound to be different than my MX-7-180 and it would be great to have some seaplane charts. I modified the spreadsheet to make it easier to alter the percentages in columns B through H. You can download the revised spreadsheet at:

http://webpages.charter.net/ameranda/av ... rmance.xls

Select columns A and I and unhide them. You should be able to see columns B through H which is where the percentages are located. Put in percentages based on your experience and provide a URL where others can download the spreadsheet. Wish we had a file download area on this forum, but we don't.

Andy

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Performance charts.

Post by georgeb »

Hi Aandy,
I'm new here and found your link to the m7-180 performance charts, but can't get it to open. Any thoughts?
Thanks.

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Re: Performance Charts

Post by SlowFlyer »

andy wrote:A lot of us have wished for Maule performance charts. Other than the Lycoming engine performance chart for the O-360-A/C series that I posted some time ago, I haven't found any. Since the Maule pilots on this forum know a great deal about Maule performance, I propose that we try to construct and improve some performance charts based on our experiences. It's kind of like the wikipedia approach to Maule knowledge transfer.

Here's a link to one that I constructed for my 1986 MX-7-180. This one maps takeoff distance, climb rate, landing distance and weight to density altitude. The 1700 lb columns use a 13% increase in takeoff distance, 7% decrease in climb rate and 2% increase in landing distance per 1,000 feet of density altitude. These are standard percentages for a constant speed prop that come from FAA pamphlets and mountain flying publications. I used 500 foot altitude increments to reduce the need for interpolation, although it makes a larger table. I added the columns for 200 pound increments in weight up to 2,500 pounds based on an estimate of a decrease in performance of 10% per 200 pounds of additional weight, so at 1900 lbs there's a 10% reduction and at 2500 lbs there's a 40% reduction. I'm sure our collective experience can improve these estimates.

http://webpages.charter.net/ameranda/av ... rmance.pdf

Since everything in the first chart is based on density altitude, here's a standard chart to convert pressure altitude and outside air temperature to density altitude. You can also use an E6-B of some kind to calculate it, of course. I find that it's easier to look it up on a laminated sheet that I keep in the airplane.

http://webpages.charter.net/ameranda/av ... titude.pdf

It would be great if we could construct similar performance charts for different Maule models, recognizing that there are additional factors like pilot experience, wind, engine condition, CG, etc. that affect aircraft performance.

I put these in .pdf format in case you don't have Microsoft Excel, but if you want the Excel version here's a link to an Excel workbook containing two worksheets that have the tables:

http://webpages.charter.net/ameranda/av ... rmance.xls

Andy
Links appear broken to me. Do you have another source for the files?
Thanks

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andy
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Post by andy »

Sorry about the broken links. I moved the files to my GoDaddy hosting site instead. Here a good link to the page where you can get the files.
http://www.maulepilot.com/data.php
Andy
1986 MX7-180
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noe flightrisk
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Post by noe flightrisk »

Check out the T.O.P. Computer for tight situations where the go/no go decision is not intuitively obvious:
http://www.sportys.com/pilotshop/product/9305
Besides take off distance, it also calculates ROC.

A good example of usage was a recent 5% downhill takeoff on dirt with an increasing 18 mph tailwind on a truely one-way airstrip at high DA. This was an unfamiliar situation where I was not willing to guess at the opposing balance between downhill and tailwind. I used my inexpensive little Dwyer hand-held wind meter, set the inputs, read the result, paced off the distance, and when I departed found once again that it was amazingly accurate. Of course it can't be as accurate on soft surfaces (how soft is soft?), and requires a known performance baseline for your plane and technique.

Some of the reviews express concern about durability, but if you don't get it wet (it is just mylar-coated cardboard) it seems to hold up just fine--mine is in excellent shape after 10 years. And, I haven't seen any other computers that consider all the factors this one does.

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Post by SlowFlyer »

Great stuff. Much appreciated

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Post by CRAZEDpilot »

Reviving an old thread - can anyone please repost these files somewhere? tHX!

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andy
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Post by andy »

Andy
1986 MX7-180
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