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Questions tagged [modifications]

Questions relating to aircraft modifications

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What does the suffix "A“ mean on specific PW1100G(A) engines?

Some time ago I tried to find out what the difference between a PW1100G and a PW1100GA exactly is. I am asking this question here because there seems to be no information online that could be useful ...
dnblkj's user avatar
  • 21
2 votes
2 answers
126 views

Where can I get blueprints of older aircraft?

I'm currently working on a project for an internship that involves modifying a 1959 Cessna 150. I won't actually be modifying a Cessna 150, but it's more of a "if you did modify it here's how you ...
Cade Miller's user avatar
0 votes
1 answer
105 views

Can people perform major modifications to an aircraft without an A/P license, as long as their company is certified per part 145?

If a company is part 145 certified wanted to do a major modification, can they do so without having A/Ps? Or does an A/P need to be present to verify/sign off? or no A/P's need to be present? At that ...
0128Z's user avatar
  • 1
4 votes
1 answer
653 views

Does 'Fat Albert' Have any significant modifications?

The Blue Angels use a C-130 known as 'Fat Albert' in some of their shows. Other than the paint job and smoke, are there any significant differences between 'Fat Albert' and a standard C-130?
Linus Kerman's user avatar
2 votes
3 answers
244 views

Does a converted aircraft require recertification? Does it break manufacturer rights?

Here is a very interesting video shows how an Airbus A330 is converted from passenger plane to a cargo plane. There are lots of changes or modifications were made to the airplane to fit the new ...
AirCraft Lover's user avatar
2 votes
1 answer
167 views

Continuing Airworthiness Requirements During Major Modification

I am involved in a program where the aircraft (B737) will undergo a major modification taking approximately 2 years which will ultimately result in a new type certificate being issued under a new ...
NearlyNew's user avatar
1 vote
2 answers
403 views

How would a fighter be changed from having static stability to having relaxed stability?

A good portion of aircraft, especially those designed before the 1970's, possessed static stability. However, modern fighters (and some airliners) have been build with relaxed static stability. This ...
ThatCoolCoder's user avatar
19 votes
1 answer
6k views

What is the upper deck on converted freighter long-hump 747s used for?

All 747s1 have an upper deck directly behind the elevated cockpit, a legacy of the 747’s genesis as a design for a strategic-airlifter competition (the upper deck and elevated cockpit were partly to ...
Vikki's user avatar
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0 votes
0 answers
94 views

What modifications/upgrades were done to US MD-80 fleet?

I have often heard stories about how most of the MD-80 fleet that are being retired in the US were modified and upgraded. What were the modifications or upgrades done?
Jamiu NINIOLA's user avatar
5 votes
1 answer
1k views

Why were most of the first-generation-Learjet wing mods never approved for the Learjet 23?

First-generation (straight-wing1) Learjets (the 23, 24, 25, 35, and 36) are, rather infamously, beasts to fly, due in part to their hideous stall behaviour;2 due to their flow-separation-prone laminar-...
Vikki's user avatar
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3 votes
3 answers
2k views

At what point does an aircraft need a new type certificate vs a STC?

First post. Yes, I did search but this specific question has not been asked before. This answer is close, however: How does a mechanic determine if a repair or alteration requires a Supplemental Type ...
Paranoidone's user avatar
0 votes
1 answer
316 views

Why was the 307’s pressurisation system removed when it was modified into the C-75, despite the fuel-burn advantage of higher-altitude flight?

The Boeing 307, an airliner derivative of the B-17 heavy bomber, was the first pressurised airliner to enter series production and go into service (hence its bulbous, altogether un-B-17-like fuselage, ...
Vikki's user avatar
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3 votes
1 answer
249 views

How to modify an amateur kit build with wing hard points

I plan on modifying an amateur-built all-metal kit plane so it has a hard point under each wing where various external loads (cameras, probes, etc) can be fitted to (university research). The location ...
Chris's user avatar
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3 votes
1 answer
403 views

What about the DC-9's wing makes wingletting it so difficult?

A common way of making older airliners more efficient without increasing their wingspan is to add winglets, either as a retrofit for existing aircraft or as a new, wingletted derivative of a ...
Vikki's user avatar
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3 votes
2 answers
121 views

How can I calculate the speed gain from using multiple STC modifications together?

Looking at a parts manufacturer website, they list various STC'd modifications for Mooneys with estimated (cruise?) speed gains for each. However, I've heard that those gains are not additive. For ...
StephenS's user avatar
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0 votes
1 answer
186 views

Would this modified tire work to prespin an aircraft tire? [duplicate]

In order to decrease that initial hit of the tire spinning up to ground speed on the runway, could adding a blades or shape into the tire rim of a commercial plane save on tires by prespinning the ...
Muze's user avatar
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15 votes
1 answer
1k views

Did the FAA order the installation of "Cooper vanes?"

On November 24, 1971, a man hijacked a Boeing 727 and parachuted away, never to be found. According to Wikipedia, this prompted (together with 2 other hijackings) the installation of "Cooper vanes" ...
Barry Harrison's user avatar
1 vote
2 answers
844 views

A modern replacement for DH.82's Gipsy Major engine

While I deeply appreciate any vintage aircraft that is powered by their original engines, I was wondering if there are any modern replacement engines available for the de Havilland Tiger Moth aircraft ...
Mahdi's user avatar
  • 617
-3 votes
1 answer
493 views

private jet based of an sr 71 [closed]

could a private jet be based of an SR 71 blackbird. By this I mean similar styling and shape. Would this be a good basis to make a private jet super sonic (disregarding sonic boom). What would the ...
SRawes's user avatar
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5 votes
2 answers
2k views

How to record flights and cockpit radio com using an Android phone?

I am a student pilot, and would like to record my training flights (in a C152) to look back on. I do not have a Go-Pro, and do not want to fork over the money for one. I do however, own a Samsung ...
nndhawan's user avatar
  • 221
13 votes
1 answer
6k views

How can I mount my iPhone 6 in the cockpit to record my flights?

I am a student pilot, and would like to record my training flights to look back on. I do not have a Go-Pro, and do not want to fork over the money for one. I do however, own an iPhone 6, that has a ...
Woodman's user avatar
  • 431
2 votes
1 answer
976 views

Can one make an electric-sailplane from transparent carbon fiber?

Is it technically feasible to make a sailplane from transparent carbon fiber? I am looking for an answer based on the specifications' comparison of the 2 different fibers. And can it be made self-...
Ayan Mullick's user avatar
10 votes
2 answers
644 views

Can a modified aircraft be imported and certified in the US?

Aircraft can be brought into the US and be made airworthy by FAA standards. What about aircraft legally modified in other countries? For example, there is a new STC to put a Rotax 912 into Cessna ...
StallSpin's user avatar
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9 votes
1 answer
5k views

What regulations surround fitting aftermarket fuel tanks inside the cabin?

Watching the first episode of Dangerous Flights, a ferry pilot has aftermarket fuel tanks fitted inside the cabin of an old Merlin IIB: What are the regulatory requirements to be able to do this? / ...
Danny Beckett's user avatar