Take off calculator

[laytonl]

Has anyone gone to the trouble to develop a takeoff distance calculator for a J? Running several scenarios on those performance charts is a pain. Lee

[PaulB]

Attached is an HTML file that does all the calculations along with weight and balance.  I wish I could take credit for it but I found it on here on an old post.  I modified it a little to calculate density altitude and a few other things.  Open it up and edit the top of the file to adapt it for your plane.  If you need any help doing this let me know.

 

 

Takeoff Calculator v4.0.html

[PaulB]

Found the original post. Looks like Bob - S50 was the original author.  http://mooneyspace.com/topic/8475-takeoff-and-landing-calcs/

 

[Piloto]

Low tire inflation, runway type (dirt vs. concrete) and uphill runway slope will also affect the takeoff performance.

 

José

[cbarry]

You might want to take a look at "Takeoff Calculator" by Randy Gawer which is an application for I products.

[Mooneymite]

Pilato makes a good point that there are a lot of variables in take-off computations.  I fly off of grass and can verify that the length and thickness of the grass makes a significant difference in the takeoff roll!

 

Years ago, I got a self contained Take-off performance "computer".  It needs neither AC, nor DC since it is essentailly a slide rule.  I really haven't used it much since none of the airports I use are marginal, but it is a simple contraption that corrects your raw take-off number for runway surface type, pressure altitude, runway slope and wind.

 

Perhaps these things are "old hat" to most of you, but I've never seen one in a store.

 

http://aviaids.com/

[PaulB]

Yeah the calculator I posted isn't perfect but I only fly on paved surfaces and always give myself a a safety margin. It probably wouldn't be hard to modify it to add grass and and slope. Just not worth it to me.

The weight and balance part is probably just as useful. Really makes calculating W&B a 10 second affair.

[laytonl]

Thanks guys, the HTML file helps. I will need to adjust it for an MSE and add distance to clear 50' too. Otherwise, this is perfect.

I'm flying off of a 3,000 grass strip that is a one-way strip. This past weekend we had a 10 kt tailwind which caused me to drag out the charts. From the data points I've collected so far, flying off of freshly cut grass adds about 10% to the takeoff roll. Long grass is significantly more.

Lee

[Bob - S50]

Just so you'll know, that file was based on the POH of a '78 J.  It will probably be pretty close for any other J that uses the IO360.  Anything other than the J though would be totally wrong.

 

Bob

[Tércio Rodrigues]

Very nice calculator!!!

[BillC]

Excellent calculator Bob and PaulB.

Thank you.

Bill

[Hansjoerg]

is anyone here with programmingskills?

i found a very good takeoff calculator for piper and cessna. maybee somebody know how to add mooney to the portfolio:
https://pohperformance.com/index.html

 

 

[N201MKTurbo]

Send a message to ForeFlight and request it as a feature. They seem to act on good suggestions.

[exM20K]

Foreflight already does that for a lot of airframes with a "Performance Plus" subscription

https://foreflight.com/products/performance-directory/#/

[WilliamR]

You mean like the app Patrick developed? 

[Hansjoerg]

54 minutes ago, WilliamR said:

You mean like the app Patrick developed? 

no, i mean like the tools i found for piper. but thank you for the information.

[Pinecone]

Best would be an app for phone, so it is always handy

 

[PeteMc]

On 6/29/2024 at 6:40 AM, N201MKTurbo said:

Send a message to ForeFlight and request it as a feature. They seem to act on good suggestions.

ForeFlight already has Takeoff Performance.  If your plane is not in there, then send them the POH info and they should add it.  (I think it takes a while, but have heard they will eventually get it done.) 

 

[hammdo]

I add a correction factor of 30% as my plane is not new ;o) on really hot days, 50%.

-Don