Ep 1 Planning & Fuel Flow Test - Task-Based Flight Test Series

Рет қаралды 1,616

Күн бұрын

Cleared Direct Merch! cleared.direct
AC 90-89C: www.faa.gov/documentLibrary/m...
eaabuilderslog.org/
Let's review some high points of Advisory Circular 90-89C that unlocks the task-based flight test plan and what elements it requires. I'll give you my personal thoughts and experiences of the major milestones leading into flight test, then we'll brief, execute, and debrief my fuel flow test which is test card zero.
Consider following Cleared Direct on IG at / cleared_direct_resources
0:00 Intro
2:03 Ombudsman Omissions
3:39 I'll pin and recap the best comment next episode
5:03 Highlights of the Task-Based Flight Test Program from AC 90-89C
12:03 Engine Break-In & First Start / Run
12:42 Weight and Balance and Center of Gravity (CG)
17:49 Airworthiness Inspection
18:02 Record Keeping
20:07 Fuel Flow Test Briefing
25:04 Fuel Flow Test Execution
28:16 Fuel Flow Test Debrief and Results
29:41 Recap

Пікірлер: 27

@richardturner6278 2 ай бұрын

Hi Steve, long time follower here. Something u might mention or discuss sometime is the added safety factor overall of building your own aircraft. I can't overstate this enough. It's an advantage to know and understand every system of the aircraft you are flying. Thank you for the work u are putting in to share this task based flight program. I've always thought too many builders out there have just basically flown around in circles not really testing as much as they are site seeing.

@CLEAREDDIRECT 2 ай бұрын

Oh man, that’s a great point. Careful, you might just get pinned!

@clilesny 29 күн бұрын

25-year career FTE and Flight Test Manager in the Developmental Test (DT) test world here. Thank you for posting the Task-Based Flight Test Series. I am considering building my own plane and I have been watching the many changing regulations over the years. I agree Task-Based is a way more efficient and informative approach to the Phase I requirements and understanding the aircraft that you built. On the safety note, recommend always wearing safety glasses when dealing with pressurized fuel, ask me how I know ;-). Cheers, Cliff

@markguenin9114 2 ай бұрын

At 6:45, you said "...essentially take out your ops limitations and put in your POH." I think that's incorrect. You are issued a Special Airworthiness Certificate (SAC) for your Experimental - Amateur Built (EAB) aircraft, and the Ops Limits are a part of your SAC. The Ops Limits never go away -- they are an integral part of your SAC. Your POH is in addition to, not in place of, your Ops Limits. Your Ops Limits specify what you can and can't do during Phase 1 (the test flying stage); your Ops Limits also specify what you can and can't do during Phase 2 (normal operations after Phase 1 is done). Think of your SAC and your Ops Limits as one document. The FAA certainly does. Both need to be in the aircraft during flight. Great series, by the way; and great channel, even before this series!

@CLEAREDDIRECT 2 ай бұрын

Yeah I definitely oversimplified. I’ll look into the regs and refine my explanation if needed (sounds like it) on ep 2. Super appreciated!

@Jason-Black 2 ай бұрын

The intro voiceovers are hilarious. Enjoying the series so far Steve!

@CLEAREDDIRECT 2 ай бұрын

Man AI is creepy, ain’t it? Let’s plan a meetup this summer!

@Jason-Black 2 ай бұрын

@@CLEAREDDIRECT I’m in!

@SteveN3695J 2 ай бұрын

Great "Food for Thought"..! You've increased my appetite...:)

@ibgarrett 2 ай бұрын

Oh - it also would be handy if you included links to any online/downloadable documents you reference... just for click ability. :D

@CLEAREDDIRECT 2 ай бұрын

What didn’t I link? Check the intro episode description for anything I might’ve missed.

@ibgarrett 2 ай бұрын

The AC90-89c. Again. I’m just whining. Too lazy to google. (No worries. I already went and got it. Kinda surprised I hadn’t already)

@ibgarrett 2 ай бұрын

If you wouldn’t mind sharing the spreadsheet you used for the fuel flow test, that would be awesome. :)

@CLEAREDDIRECT 2 ай бұрын

I'm still thinking about it...I'll let you know if I do.

@ibgarrett 2 ай бұрын

@@CLEAREDDIRECT I'm just too lazy to pause the screen and do it myself... :)

@flynjay7178 2 ай бұрын

I am currently going through a Part 147 program to get my A&P certificates. I have also not found a good reference for maintenance entries. Maybe an organization like Savvy can create an example. This is the line from FAA-H-8083-30B, "Whenever maintenance, preventive maintenance, rebuilding, or alteration work occurs on an aircraft, airframe, aircraft engine, propeller, appliance, or component part, a maintenance record entry must be created." 14 CFR 91.417 is the reference for what is required. Basically: Description of work performed, Date Completed, Person that completed work, signature (is defacto return to service for work performed).

@CLEAREDDIRECT 2 ай бұрын

Awesome, thanks for the good info! Im guessing they don’t want to “lead the witness” so to speak and encourage simple accurate entries rather than canned statements but I kinda want some examples! I’ll have to thumb through my Bonanza logs again. Good luck with the program. We need a lot more good A&Ps!

@johnwilcox2239 2 ай бұрын

Fuel test question, rather than trying to chase a static volume, did you consider, would it not be easier, more precise, to use weight. You don’t have to be exact on stopping/ volume chasing, just time start and stop, weigh ,calculate?

@CLEAREDDIRECT 2 ай бұрын

I didn’t consider it. I suppose you could if your scale can be accurate as liquid is added, potentially sloshing. I think I’d measure by volume again if I had to. Thanks for the question!

@marceisenmann8010 2 ай бұрын

Hi Steve. What speed did you choose as V_NE on your S21 and do you have to reach or maybe exceed it during flight testing?

@CLEAREDDIRECT 2 ай бұрын

I’m essentially going with the factory Vne of 215mph (187knots). You definitely don’t want to test that. Sure, there’s plenty of safety margin built in, but I don’t flirt with it. Absolutely zero benefit as I see it. The first thing to fail will be the windscreen or skylight.

@marceisenmann8010 2 ай бұрын

Okay. I jut thought there might be a requirement to test it. I’m flight testing here in Germany and they make us fly V_D (10% over V_NE) as TAS. I set my V_NE for that reason much lower to 165kts CAS (operationally sufficient). I’m not very comfortable with the high V_NE that is stated in the Rans POH.