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Aeronautical Engineering/Questions

SubjectDate AskedExpert
Wallpaper fixing in commercial aircrafts.2/5/2017Jan Zumwalt
  Q: Do you recommend to fix nice wallpaper inside commercial aircraft? Thanks Prashant
  A: I lack full knowledge of aircraft interiors to be able to completely answer your question, but I ...
Seats location in Commercial airlines.1/31/2017Paul Soderman
  Q: What is the reason that we see Passengers seats location in unidirectional and not bidirectional in ...
  A: Not sure, but I assume you can get more passengers in a space sitting unidirectional because you put ...
Fish tanks in Commercial Airlines.1/27/2017Jan Zumwalt
  Q: Is it feasible to install and maintain Fish tanks in Commercial Airlines as part of interior ...
  A: It might be possible, for example fish tanks can be made with sealed tops and decorations glued so ...
VAWT induction factor12/28/2016Paul Soderman
  Q: It seems as though every time I ask anybody about this, I get a response saying they don't answer ...
  A: William - I would have to see your analysis to know what you are doing. I believe that can be ...
Perpetual Motion Machines11/17/2016Paul Soderman
  Q: I came up with an invention which called the Self-Powered System Electricity Producer. My invention ...
  A: No, you do not have a perpetual motion machine because it requires a battery for power that gets ...
design a wing with minimum drag coefficient10/31/2016Jan Zumwalt
  Q: Good Afternoon Sir, I wish to know the procedure and calculations involving in designing of a wing ...
  A: All aerodynamics are now done with computer simulators. Once the design is narrowed, wind tunnel ...
Heat loss of an axial compressor10/26/2016Paul Soderman
  Q: For insulated compressors that are used in gas turbine power plants, is the insulation sufficient ...
  A: It is difficult to generalize about the insulation quality of compressors because each design is ...
International airport design.8/15/2016Jan Zumwalt
  Q: I would like to know the factors / parameters regarding the number of terminals required in a ...
  A: In the USA, the FAA and Customs keeps tract of the number of flights and their origin and ...
aircraft engineer to aeronautical engineer8/7/2016Jan Zumwalt
  Q: Sir, I'm just wondering: is it possible for a license aircraft maintenance engineer to pursue ...
  A: Yes, further study is usually very desirable. Often once a maintenance engineer finds an interesting ...
Helicopter Headlights.7/28/2016Jan Zumwalt
  Q: Do Helicopter have Headlights? Front, Back,Top,Bottom? If yes, where are they fixed? Thanks & ...
  A: Helicopters do not ordinarily have landing lights like fixed wing aircraft. Fixed wing aircraft ...
Plane Jump Scenario6/16/2016Mark Janus
  Q: What would happen if a Plane was Free Falling to an Ocean, and as soon as the plane was about to hit ...
  A: Both the plane and YOU are falling at the same speed thus you'd hit the water at the same speed as ...
Commercial aircraft minimum number of passengers business rule.5/17/2016Jan Zumwalt
  Q: Are there Business rules for Commercial aircrafts takeoffs are only possible if minimum number of ...
  A: There are no requirements for the number of passengers on board for any flight - business, ...
Perfessional Interview5/16/2016Paul Soderman
  Q: Soderman, I am an 11th grader interested in aerospace engineering and would like to ask you some ...
  A: 1. psoderman@gmail.com 2. aeronautical engineering 3. Aerospace Engineer Group Leader 4. Direct the ...
Aeroplane Tiles Design.5/8/2016Jan Zumwalt
  Q: Do you recommend Ceramic tiles installation within commercial aircrafts?. Thanks Prashant
  A: I have never seen ceramic tiles used in airplanes and I would not expect to ever see them used. ...
T-Tail Fairing5/7/2016Paul Soderman
  Q: I'm designing a hydrofoil sailboat and I'm curious as to if the interference drag would be high ...
  A: Interference drag of intersecting struts can be substantial, and does not disappear with increased ...
School Project Interview5/1/2016Jan Zumwalt
  Q: Greetings, Mr. Zumwalt, I'm currently working on a school project that involves interviewing a ...
  A: 1) What is your current job title? Feel free to describe your particular job/duties in a usual day ...
Aeroplane cargo location.4/29/2016Paul Soderman
  Q: Is it possible to design the cargo location of the airplane at the top and enclosed as the normal ...
  A: Not sure I understand your question. But in general you can design the cargo hold to be anywhere on ...
Airplane cargo design.4/29/2016Jan Zumwalt
  Q: Is it possible to design cargo location of the airplane which is on the top and enclosed as the ...
  A: Yes you could. The Boeing flying wing would need to use a similar concept. see ...
International commercial Airlines supporting Pets Travel.4/28/2016Paul Soderman
  Q: Do International commercial Airlines allow Pets Travel with the owner in the Airplane?. Thanks ...
  A: Most airlines allow shipment of small animals in the cargo area if a certified animal crate is used. ...
International commercial Airlines supporting Pets Travel.4/28/2016Jan Zumwalt
  Q: Do International commercial Airlines allow Pets Travel with their owners in the Airplane?. Thanks ...
  A: Many countries have strict regulations regarding international pet travel. The airlines suggest that ...
Food Storage and Processing Equipments in Aeroplanes.4/4/2016Jan Zumwalt
  Q: Do Microwave oven and Refrigeration Systems can be deployed in Commercial aircraft Pantry ?. ...
  A: Yes, commercial aircraft where the first use of microwave ovens in the 1970's even before they where ...
Portable Vacuum cleaner for Aeroplanes.3/30/2016Jan Zumwalt
  Q: Do you feel Portable vacuum cleaner product can be useful for Aeroplanes cleaning maintenance ...
  A: Most aircraft flown on a regular basis are vacuumed and cleaned once a day. In the USA, the FAA ...
passenger aircraft safety3/17/2016Paul Soderman
  Q: It seems to me that all focus on passenger planes seems to be on fuel efficiency, yet it seems that ...
  A: Over the years many improvements have been made in making passenger compartments less flammable and ...
CCTV monitoring System for Cable Cars - Aerial Tramway.3/10/2016Jan Zumwalt
  Q: Is it feasible to install CCTV cameras in Cable Cars and then Centrally monitored by CCTV monitors?. ...
  A: The problem with remote CCTV is that wireless video is very degraded. Large metropolitan areas ...
Aerospace Engineer Questions2/18/2016Jan Zumwalt
  Q: Question for a Aerospace Engineer. For a class to find a career. What is your average day like? ...
  A: 1. What is your average day like? There are no average days... I may be assigned to a small project ...
Your job2/17/2016Jan Zumwalt
  Q: Could you please answer these questions? I need them for an assignment in one of my classes. Thanks! ...
  A: 1. What is your average day like? There are no average days... I may be assigned to a small project ...
Job2/17/2016Mark Janus
  Q: Could you please answer these questions for me? I need them for my 7th grade TAG class. Thanks! ...
  A: What is a normal day on the job like? busy teaching classes, grading work, and organizing research ...
Wireless Intercom service in Commercial Aircrafts.2/14/2016Jan Zumwalt
  Q: Do you recommend to install Wireless EPABX Systems within commercial aircrafts?. Thanks Prashant
  A: EPABX or more commonly known as PBX in North America was used on commercial aircraft from about 1990 ...
Jet engine2/12/2016Jan Zumwalt
  Q: How does a jet engine work ?I've seen many videos and all say that the fan sucks in air and then the ...
  A: I can understand your confusion. I once pondered the same question :) Perhaps the easiest way to ...
Pilot Flying Licence.1/14/2016Jan Zumwalt
  Q: Do Pilot flying licence has a expiry period and has to be renewed after certain term period?. ...
  A: This may sound a little strange, but the "license" never expires - it is good for a lifetime. ...
Helicopter Rotor Blades.12/7/2015Mark Janus
  Q: Can there be more than one pair of rotor blades in a Helicopter ?. If yes, what are the advantages ...
  A: Certainly there can be more than one set of rotor blades ... coaxial counterrotating blades are ...
Helicopter Rotor Blades.12/7/2015Paul Soderman
  Q: Can there be more than one pair of Rotor blades in a Helicopter?. If yes, What are the advantages ...
  A: Do you mean a rotor with a pair of blades or a helicopter with a pair of rotors? Many helicopters ...
Helicopter Rotor Blades.12/7/2015Jan Zumwalt
  Q: Can there be more than one pair of symmetrical rotor blades in a Helicopter?. i. e. Two, Three, ...
  A: Helicopters have been built with from 1 (w/counter balance) to 10 or more blades. Any number of ...
PID Temperature controller applications in Aeroplanes.12/4/2015Jan Zumwalt
  Q: Can there be applications of PID temperature controller in Aeroplanes?. Thanks Prashant
  A: Yes, a modern turbo prop aircraft may use 50-100 PID, jet airliners will use several hundred. The ...
Thermoelectric balloon11/25/2015Mark Janus
  Q: I have had an idea relating to the production of water. It's a few expertise disciplines but I ...
  A: Sounds interesting... you probably need to run some feasibility numbers ... basic things like ...
Life of a commercial aircraft.11/23/2015Rajeevlochanam B A
  Q: What is the life of a commercial aircraft?. Thanks Prashant
  A: this is a general question, it depend on design, materials and technology. Hence, life of ...
Life of a commercial aircraft.11/23/2015Jan Zumwalt
  Q: What is the life of a commercial aircraft?. Thanks Prashant
  A: The question is unclear - I am going to assume you mean "What is the lifetime of a commercial ...
Storage facility in Commercial Airlines.11/16/2015Jan Zumwalt
  Q: Do you feel Electronic lock with password can enhance security in commercial airlines for luggage ...
  A: Electronic verification for access is the best solution I have seen. If a person is fired, changes ...
Project Lead The Way school report9/25/2015Paul Soderman
  Q: my name is Warren Snover and I'm currently in tenth grade. For my Project Lead The Way (engineering) ...
  A: I am now retired from NASA, but I will answer as if I were still on the job. 1. Aeronautical ...
Gas Turbine transmissions.9/25/2015Rajeevlochanam B A
  Q: I'll try to be brief. On a small centrifugal gas turbine how does the compressor spinning at ...
  A: I am not very clear on your query. But, I shall try to answer your question. There are Four types ...

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Aeronautical Engineering

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Jan Zumwalt

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Expertise

SMALL & LARGE PLANES - Aeronautics, Aerodynamics, Designing, Fabricating, Trouble shooting, Repairs, Flight testing, Fluid & Pneumatic controls, Engines, Propellers, Sheet metal, Rivets, Electronics, Fabric, Schools, Career choices, Aircraft systems.

Experience

FAA certified commercial pilot FAA certified (A&P) Air-frame & Power-plant mechanic Aeronautical Engineer - University of Anchorage (Alaska) High school instructor, computers, robotics and aviation Current president of EAA chapter 837 (Payette, ID) Past Director of Maintenance (two airlines) Past Continental Airlines maintenance shift supervisor (Anchorage, Alaska)

Organizations
Current president of EAA chapter 837 (Payette, ID)

Education/Credentials
FAA certified commercial pilot, FAA certified (A&P) Airframe & Powerplant mechanic, Aeronautical Engineer - University of Alaska (Anchorage), FCC MROP-Marine Radio Operators License, FCC GROL-General Radio Operators License, FCC RADAR endorsement, GEN FAM certificates MD aircraft, GEN FAM certificates Boeing aircraft, State Instructor License, High school instructor, computers, robotics and aviation

Past/Present Clients
Continental Airlines, University of Alaska, Pegasus Aircraft Maintenance, Klondike Air, Methow aviation, Bridget Mina Infant Foundation, Aviation Wholesale Supply, Bureau of Land Managment

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