James F.
  • Male
  • San Diego, CA
  • United States
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James F.'s Discussions

Carbon Fiber

Started this discussion. Last reply by James F. May 27, 2010. 2 Replies

Does anyone know where to get MJ46-MJ60 (High and Ultra High Modulous) carbon fiber tape?

Tags: fiber, carbon

VPP through ArduPilot

Started this discussion. Last reply by Doug Weibel Apr 9, 2010. 5 Replies

Has anyone ever tried to control a variable pitch prop through ArduPilot?

 

James F.'s Page

Latest Activity

James F. replied to Ellison Chan's discussion Brainstorming Specifications. in the group DIYDrones - CNC Project
"Why not use a piece of honeycomb with steel face sheets? This will give us light weight and great rigidity with only a minimal increase in cost."
Jun 1, 2012
James F. commented on UAS_Pilot's blog post 40mm retractable camera turret
"I don't think I follow on some parts of the design. What pivots the ball about the horizontal axis? I see how the vertical axis works and I can see how the retract mech. could work... What is the wedge for? Where does the second servo go?"
Mar 14, 2012
James F. commented on UAS_Pilot's blog post 40mm retractable camera turret
"We should keep it simple. Start with a very simple retracting turret for a specific camera size and scale up from there. We just need to have an idea that everyone can play around with and innovate off of or poke holes at."
Mar 13, 2012
James F. commented on UAS_Pilot's blog post 40mm retractable camera turret
"If you send me the hand drawings I can CAD it up for you."
Mar 13, 2012
James F. replied to James F.'s discussion Carbon Fiber Easy Star for sale
"Very true, but they would have to have the same fuselage interface or you would have to create some sort of wing attachment "hard point". Might as well just buy the whole glider at that point..."
Feb 16, 2011
James F. commented on wayne garris's blog post techpod 2.0 progress blog
"What kind of vibration do you see with the thin member that connects the camera to the body? Have you thought about turning that into a torque box or using stringers to reinforce it?"
Dec 2, 2010
James F. replied to William Gross's discussion Help with wing and airfoil design
"1) I would base the airfoil off of an existing airfoil. From the looks of your airfoil you will have a lot of lift at slow speeds, but also a ton of drag and large moment. There are many tools you can use to come up with the wing design (x-foil is a…"
Nov 10, 2010
James F. commented on Chris Anderson's blog post DIY Drones in the Wall Street Journal
"@Paul I believe the pictures are just black and white. Also, the placement of the yellow boxes would suggest a description of the pictures, however the boxes don't describe the plane in either picture."
Nov 3, 2010
James F. replied to hamadivo's discussion Low cost Fiberglass
"You're going to want to figure out how to build it first. It's going to be hard to make anything larger than the size of a cell phone with that amount. Generally you have to factor in a waste quantity (40% or more depending on how much…"
Oct 5, 2010
James F. replied to hamadivo's discussion Low cost Fiberglass
"What kind of fiberglass (weight, style, E or S, quantity, price range)?"
Oct 5, 2010
James F. commented on Dror Caspi's blog post Quiet, Tilt-Rotor Unmanned Aircraft Is Behind the Lines Spy
"In terms of efficient flight, it will always be better to have the fewest number of motors on during cruise. If its possible to make the rear motor swing down and have EDF on the wings, it would be best given this train of thought. However, there…"
Oct 4, 2010
James F. commented on Dror Caspi's blog post Quiet, Tilt-Rotor Unmanned Aircraft Is Behind the Lines Spy
"Might be cool to take a more F-35ish approach and make that rear prop EDF to decrease drag...."
Oct 4, 2010
James F. commented on wayne garris's blog post techpod1.0 ready to ship
"Looks like a great little bird you have there. It would be nice to see a more aerodynamic backend though. I'm sure flight times would increase quite a bit with a bit more work on it."
Sep 30, 2010
James F. commented on Tj Bordelon's blog post Fried motors
"I wouldn't bother with cheap motors unless you plan on running them way below rating. For the money you end up spending on 2-3 cheap motors, you can easily buy a high quality ARC motor or Neu motor. I have personally flown my 500w ARC well past…"
Sep 27, 2010
James F. commented on Sys-Ak's blog post Crash 4 Sure: integrated Autopilot & OSD
"Couldn't you split the signal through the audio to get both?"
Sep 24, 2010

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About Me:
I am an Aerospace Engineer with Northrop Grumman working on UAV design.

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