07-03-2014, 05:16 AM
Join Date: Aug 2005
Location: NY, USA
Thanked 346 Times in 308 Posts
Club: Long Island Silent Flyers
Bagging wings - A resource thread
Bagging wings - A resource thread
I am not a builder but I have a lot of respect for those who like to build.
I have been preparing a section of my weekly newsletter on Bagging Wings. There will be a presentation at our club on the topic at the next meeting.
I think I pulled together some good resources so I am going to post them here for those who might be interested.
And I encourage anyone who knows hot to bag wings or who has question about bagging wings to post in this thread. Maybe we can get a good exchange going.
If my club is interested we might start a "one design" group build around a bagged wing project. If it happens I will let you know and share a link to the discussion.
BAGGED WING GLIDERS –
THE LOW COST WAY TO BUILD COMPETITIVE TD, ALES and HAND LAUNCHED GLIDERS
Many of the gliders flown at the ESL contests at our field are bagged wing designs.
Learning about bagging wings will open up a whole new world of options for you. You can make DLGs, larger models, winched gliders and electric gliders that look and fly very much like the high end molded wing gliders.
First you cut the foam cores
Hot wire cutting foam cores
Hot wire kit review
Custom cut foam cores if you don’t want to cut your own
Make your own foam cutter
Making foam cutting templates
Then they go in the bag
Vacuum Bagging Overview video
He is not making a wing, he is making a part on a mold
This could be used to make 1/2 of a fuselage
The process is similar for wings as you will see in the other videos
Wing bagging videos – to give you a flavor of what it takes:
Bagging a DLG wing, start to finish
Bagging DLG wings
Bagging a scale glider wing
Telos building thread with $10 VACUUM BAGGING SYSTEM Tutorial!!!
Vacuum Bagging Systems
Vacuum bagging with a vacuum sealing food saver
May not be good enough to build a Supra but it might be good
to give the process a try if you have one of these.
Nice write-ups and photos of building a foam core wing for bagging.
May fill in some details that you don’t pick up from the videos
Instructional Videos on making bagged wings
Beginners Guide to Cutting and Bagging Foam Wings
Phil Barnes - Vacuum bagging made easy – video set (I have this set)
This is based on the stressed skin approach, as I recall
I confirmed that the video is still available even though a couple of the preview links
on the page don’t work. You can order the video here.
OK, you are interested. What can you build? Here are some examples.
You can use this technique to build any kind of aircraft but being a glider pilot mostly I focus on gliders. Here are Mark Drela competition glider designs that are based on bagged wing construction
Supra – 3.4 meter glider
Aegea 2 – 2 Meter Glider
Super Gee 2 – DLG
You can buy the Super Gee 2 foam cutting templates and the boom here:
Lost foam method of making composite parts.
You could use this method to make your own pod/fuselage
Glider design discussion based on a bagged wing Supra. This conversation goes back to 2011 and is still active today.
If you want to read a bit about how people take an existing design, the Supra, and modify it, this is an interesting discussion.
OK, You made the wings. What about the rest of the parts?
Continuing with the glider designs above, you can make your own fuselage/pod or you can buy one These guys sell pods, booms and v mounts
If you want to design and build your own – these are for the composite building junkie
DEPARTMENT OF DEFENSE HANDBOOK - COMPOSITE MATERIALS HANDBOOK
XFLR5 - Planform and airfoil integrated design
Profili - Airfoil performance and plotting software
Plane Geometry - Design parameters in Excel spreadsheet. Plug in the measured parameters of your model and back out the performance properties, or vise-versa. Great for scaling up planes or making small changes in design but keeping the flight characteristics the same
Linkage Design - calculate you linkage layouts, calculate torques and moment arms for your servos, etc
PLEASE POST YOUR QUESTONS OR INPUT. TELL US OF YOU EXPERINCE BUILDING BAGGED WING GLIDERS. SHARE YOUR TIPS AND TRICKS, PHOTOS AND VIDEOS.