Hi guys I decided to make the "T Drone an EDF and if it doesn't fly? well ? I will suck it up and maby try a glow engine on a pylon .I got a 80 mm Delta 32 EDF out of a Habu The brochure says in a static lab test it puts out 5.4 pounds of thrust and a lab test in a Habu 4.8 pounds of thrust . I don't plan on zipping all over the sky like the guys with the jets do even though I will be the same weight . My plane has a very efficient high lift high aspect ratio air foil it carrys the cord right to the wing tip with no taper and with the wind shear coming over the bank here once I get to altitude I can pretty well shut the motor off and glide he whole time l like I do with the radian pro now that I "committed "on a power plant the only decision I have to make is should I put it in a streamlined pod on top of the wing? Or mount it in the fuselage? It willonly take up 12" with the thrust tube and the interior volume I have to work with is 36" by 5" by 3 3/4 " Have a great day".
You need to be a member of diydrones to add comments!
Comments
Carl how thick is the aluminum that have used? Did you anneal the fuse after welding? Have you considered epoxy bonding the aluminum instead of welding so as not to ruin the temper of your material. I have a Lotus Elise that has an epoxy bonded monocoque chassis. They do this so they dont have to anneal a huge part after welding there fore get to use much thinner material for the same strength.
I am giving Carl the "What if?" Award for this project. It is a good thing and I think we will all benefit from his build and testing. In fact, I found, onlilne, a document/paper written by a student in the middle east.
The student used an aluminum spar in his build of the wing. Part of his analysis was modeling the stresses and wing loading with appropriate multicolor stress pictures and such. At least he had enough sense to have a fun college project and paper.
In the case of the student'spaper, very little actual flying was done.
In Carl's case, I suspect way more flying will be done. Go man, go!
The wing area is 78" by 9" or 702 sq" the ribs and skin on top are 1/16 balsa it is the foam and spar that give it strength The build is in my previous posts I am picking up a baby scale that measures ounces and fraction of ounces to weigh every thing as I put it in to get the COG without to much trimming ballast .
I think you may need weight the airframe again. It sounds off to me 2lbs starting weight? What is the range and minimum division on your scale?
Hi Carl, what is the total wing area of your aircraft? At 5 lbsTOweight a good start would be 600 to 800 square inches.
Yes there were many lightning holes, maybe I just have made too much girder in my wings, so that was a big fail from me, I hope tricopter will be better (if someday my software work :D). I'm surprised, I tough aluminium will be heavier. I can't wait to see your next post :D May you include the total weight next time ? :D
I'm following this project, I love the way you build it (alluminium/foam) so I have already build one using 1/8" thick plywood, it was incredibly heavy I hope you will be able to keep weight acceptable, that will not be easy.
Thumbs up
Robert thanks for the comment I almost bought a Habu or a F4 phantom this EDF Goes into I Will try it here if it doesn't work out I will re power this (is that "Barking" I hear in the work shop ?) and buy the F4. Check out some of my previous posts if you want to see the build . I learn by mistake this could be it
An EDF will make your model a dog that is incredibly inefficient. It already looks pretty heavy so just put a conventional prop up front and call it a day. Did you anneal the air frame after welding? The aluminum looks pretty thick too, what does it weigh. Thumbs up for trying something different!