737 Short Field Performance

This is a detailed look at the Short Field Performance improvement package that has been offered on the NG and MAX since 2006.
Contents
0:43 Overview
5:42 Spoiler deflection
8:01 High lift devices
18:13 Two position tailskid
27:05 Idle thrust delay
29:45 Landing gear
33:35 Software updates
42:03 Options

[@BobbyGeneric145]

Im such a nerd... I don't even operate the 73...im on the bus, but i listen to these whilst doing busy work!

[@ChrisBrady737]

Your dedication is amazing. Glad you are enjoying the videos.

[@blueberrypilot3]

For some reason, I picture Chris Brady recording his videos in a smoking jacket, holding a pipe, sitting in a rocking chair by the fireplace. Great videos!

[@ChrisBrady737]

What a great image, yes let’s go with that 😂

[@RedEye737]

It keeps amazing me how much I don't know. When I saw "flap load relief" function light, my reaction was as follows "wth is that?" Captain Brady, we are literally blessed to have you showing and explaining all of what 737 has to offer. Unfathomable amount of work and experience has gone into making these presentations.

[@ChrisBrady737]

You are very welcome. I am happy to pass on my learnings from decades flying the 737.

[@a.nelprober4971]

Not going to lie Chris waited for a video on this. Thanks a million.

[@ChrisBrady737]

I hope it lives up to your expectations - enjoy!

[@chrisj2848]

Ive had your book for years but just found out about your channel today in ground school. Looking forward to watching the rest of your content. Thank you for sharing your knowledge! Cheers 👍

[@ChrisBrady737]

I hope your groundschool was more than just my video 😂 Thanks for buying the book, it all helps cover the costs of producing the the videos, book & website. 🙏

[@syednaveed5521]

Pure brilliance in content and presentation as always

[@ChrisBrady737]

Thank you Syed for your kind comments.

[@apgardude]

Chris: BRILLIANT video; exactly the info I needed, all in one place.

[@ChrisBrady737]

Thank you, glad you liked it.

[@user-wd5zu5no5y]

thanks for the fantastic video, Chris, i will learn the difference between SFP1 and SFP2 at your next video, thanks a million.

[@ChrisBrady737]

I cover this in the "Options" section of this video. On the FMC IDENT page .1 is basic SFP and .2 is SFP with 2-position tailskid.

[@michelS182]

Great video, just to comment on the ‘’Reduced Engine Idle Thrust Delay’’. Another reason I believe why on the SFP it is reduced to 2s is for the certified data when reverse thrust is not credited for. Basically it lowers the time the engine is producing higher forward thrust.

[@ChrisBrady737]

Hi Michel, Yes of course you are absolutely correct, I forgot to add that. Thanks for the reminder.

[@apgardude]

That's exactly what I was thinking: if there's no credit for T/Rs anyway, let's optimize the residual thrust instead.

[@telescope64]

Brilliant,as ever,thank you Chris.Brgds from Paul.C.

[@ChrisBrady737]

My pleasure and thank you for your help

[@shubhamdubey915]

Hey Capt, your Vedios and Explanations are amazing Thankyou

[@ChrisBrady737]

You are very welcome

[@peterp4319]

5:50 Spoiler Deflection Slide. The presentation implied that the inboard Ground spoiler (#7) deploys to 60 degrees for both SFP and non-SFP models. This is only true for SFP models. Maximum deployment of the inboard Ground Spoiler of non-SFP models is 52 degrees.

[@ChrisBrady737]

Correct, sorry if this was misleading. It was perhaps more clear in my Flight Controls - Roll video where I used a photo of an SFP and non-SFP aircraft for comparison.

[@jimocall]

Awesome video Chris. Am I right to assume the increased landing distance for an SFP (vs. non SFP) aircraft for a Flaps Up event can be attributed to the Speed Brake limit stop on landing?

[@josephfournier3574]

Thanks!

[@ChrisBrady737]

You are very welcome and thank you for the generous donation 🙏

[@umi3017]

Thanks for all these info! Just wonder how the SFP on NG got those spoiler deflection change with speed? AFAIK the spoiler mixer is a quite complex mechanic device. Or is the change are done on individual PCUs?

[@ChrisBrady737]

Individual PCUs. A solenoid valve in the flight spoiler PCU activates to allow supplemental spoiler travel. The solenoid valve command is removed once speed drops below 60 knots causing spoilers to move to a normal deflection.

[@raghusharma6939]

Ultimate

[@ChrisBrady737]

Glad you liked it

[@olcosse]

Thank you very much for all those great videos ! I was surprised to learn that Flaps 2 was an option on the originals, do you have any idea why this is no longer the case ?

[@ChrisBrady737]

Hi Oliver, I have no idea why they dropped it.

[@JoakimKjellander]

I really love your channel, cant belive I havent found it earlier! Do you happen to know where to get the fppm manual for the 800 with SFP? I am unable to get it through my company

[@ChrisBrady737]

Better late than never to the party! Re the FPPM, your company should have MBF access, it is available for download from there. Ask your Fleet Manager or Fleet Tech Captain.

[@yuzbasivolkan86]

Thank you for everything that you explain and share with us, but i’ve a question you may answer. There are many companies operating 737ng series are publishing more restrictive wind limitations instead of using boeing suggested wind speeds, i can understand the environment and the other dynamic things. I’m not sure using more conservative speeds and limits are decreasing crash rates. Thank you captain.

[@ChrisBrady737]

You are welcome for the videos and website. Re your question, Boeing do not have suggested windspeeds, they have maximum demonstrated windspeeds. Boeing is a manufacturer not an operator. It is up to operators to set windspeed limits on their crew/runways.

[@obasaran35]

One question. Does taking off with a static run up have any positive effect on takeoff run distance? I couldn’t find anything in documents.

[@ChrisBrady737]

If you mean setting 40% or take-off thrust against the brakes then releasing, then yes, it will have a small benefit.

[@naguganesh5166]

Great video Can u explain me how flap load relief system contribute to short field performance??

[@ChrisBrady737]

It doesn't directly contribute BUT there is more scope for using higher flap settings for take-off which may lead to more overspeeds, so perhaps the increased FLL was to allow for that.

[@apgardude]

No effect on performance, obviously. I'm wondering why it was originally only provided for flaps 30 / 40 ?

[@user-wd5zu5no5y]

what's the difference between SFP1 and SFP2, Chris

[@ChrisBrady737]

I cover this in the "Options" section of this video. On the FMC IDENT page .1 is basic SFP and .2 is SFP with 2-position tailskid.