Wattflyer RC Network: RC Universe :: RCU Magazine :: RCU Forums :: RCU Classifieds :: RCU User Reviews :: RCU YouTube
Home Who's Online Calendar Today's Posts RealTime Post Spy Mark Forums Read
Go Back   WattFlyer RC Electric Flight Forums - Discuss radio control eflight > Electric R/C Airplanes > Delta & Flying Wings
Register Members List Wattflyer Extras Articles Search Today's Posts Mark Forums Read Social Groups

Delta & Flying Wings Discuss electric powered delta (flying wing) style aircraft here.

Thank you for your support (hide ads)
Reply
 
Thread Tools Display Modes
Old 11-09-2008, 05:34 PM   #1
dmarko
Member
 
dmarko's Avatar
 
Join Date: Jul 2007
Location: Naples. Florida
Posts: 362
View dmarko's Gallery8
Thanked 4 Times in 4 Posts
Club: no club...wherever there is a safe open space
iTrader: (0)
Friends: (10)
Default PVC Wing Launcher (alternative to hand launch)

Hi All.
I wanted to post pictures of my simple PVC pipe LAUNCHING system for zagi type wings.

Out of frustration during the last year of trying to hand launch an unbalanced or out of whack wings and causing more damage on a simple throw, I decided to make something that helps take a little more risk out of hand launching or maidening new wings.

My newly built mini wing running 4200KV on a 17oz model is more than enough power to get it going at a 45 degree angle. So far so good!

Take a look.
dmarko is offline  
  Reply With Quote
Old 11-21-2008, 11:59 PM   #2
spad7
New Member
 
Join Date: Nov 2008
Posts: 7
Thanked 0 Times in 0 Posts
iTrader: (0)
Friends: (0)
Default

dmarko; You inspired me to try this also, I have several wings, one Wild Wing and a few home made ones like the ZagNutz. They can all be interesting to launch.

I put something like this together today.

Tell me what did you do to the bottom of the wing to keep it straight on take off? Are you worried about hitting the prop?

Mike

Sarasota Fl
spad7 is offline  
  Reply With Quote
Old 11-22-2008, 02:53 AM   #3
celticflyer
Member
 
Join Date: Aug 2007
Posts: 374
Thanked 20 Times in 20 Posts
iTrader: (0)
Friends: (0)
Default

Take a look at the changes to the bottom of my Swift. That should keep it safe for a straight launch


Attached Thumbnails
Click image for larger version

Name:	100_1405.jpg
Views:	374
Size:	16.0 KB
ID:	84486
celticflyer is offline  
  Reply With Quote
Old 11-22-2008, 04:57 AM   #4
dmarko
Member
 
dmarko's Avatar
 
Join Date: Jul 2007
Location: Naples. Florida
Posts: 362
View dmarko's Gallery8
Thanked 4 Times in 4 Posts
Club: no club...wherever there is a safe open space
iTrader: (0)
Friends: (10)
Default

celticflyer..
nice method to keep it straight on the launcher.

spad7..
I have hit prop several times because of nasty tendency of the wing to pull left on my old set-up. I have since changed motors to an Eflite Six Series and have yet to try out the launcher.

I built this out of necessity while I experiment with this new wing.
I didn't want to keep crashing by throwing and having to repair each time.
Once it gets right, I will go back to hand launching.

Hope this helps
Dave
dmarko is offline  
  Reply With Quote
Old 11-22-2008, 06:35 PM   #5
spad7
New Member
 
Join Date: Nov 2008
Posts: 7
Thanked 0 Times in 0 Posts
iTrader: (0)
Friends: (0)
Default

DMARKO; I tried a launcher this morning with my Zagnutz, very windy morning, the first attempt worked, it just jumped into the air, but subsequent attempts failed. Finally the wing went crooked on the launcher and I broke the prop.

I was able to hand launch it after that, like I said very windy morning, hand launches just floated until I could get to the sticks.

Nice idea I might mess with it some more. I have also heard of using a cradle on wheels that the wing can just lift off of.

Mike
spad7 is offline  
  Reply With Quote
Old 11-24-2008, 10:13 PM   #6
FlyWheel
Ochroma Lagopus Tekton
 
FlyWheel's Avatar
 
Join Date: Jul 2007
Location: Blackstock, South Carolina
Posts: 2,537
View FlyWheel's Gallery5
Thanked 70 Times in 68 Posts
Club: Lancaster County Fliers
iTrader: (0)
Friends: (3)
Default

That design would be fine for high powered wings that produce enough thrust to not only take off at that angle, but also overcome the drag of the twin PVC booms. But what about weaker wings? Do you think you could come up with a launch system that could thrust it above stall speed dead stick?

The motor ould take over once in the air (think aircraft carrier steam launch).

"Give a man a plane and he'll fly for a day.
Teach a man to build a plane and he'll fly for a lifetime"
FlyWheel is offline  
  Reply With Quote
Old 11-24-2008, 10:34 PM   #7
dmarko
Member
 
dmarko's Avatar
 
Join Date: Jul 2007
Location: Naples. Florida
Posts: 362
View dmarko's Gallery8
Thanked 4 Times in 4 Posts
Club: no club...wherever there is a safe open space
iTrader: (0)
Friends: (10)
Default

Well.
I had the "work in progress" mini wings (producing roughly 24 Oz of thrust (110% power to weight ratio) take off just fine from this platform.
The wings are quite strong. I know. I have crashed it at least 5x now. No damage.

I am more focused on seeing of the airfoil, CG and motor thrust angle are all gonna work for this "homemade" wing right now.

I saw a video on Youtube. MUST SEE .

The guy launches the zagi TOTALLY VERTICAL from the ground.
So I am convinced it'll work at 45 degree angle.
Dave
dmarko is offline  
  Reply With Quote
Old 11-24-2008, 11:37 PM   #8
Angler-Hi
Super Contributor
 
Angler-Hi's Avatar
 
Join Date: Dec 2007
Location: Ft Hood, Tx
Posts: 4,096
View Angler-Hi's Gallery20
Thanked 350 Times in 338 Posts
Send a message via Yahoo to Angler-Hi
iTrader: (5)
Friends: (40)
Default

Dave, if that guy can take off like he did, I'm sure you're launch system will allow you to take off from a 45 degree angle with no problems.

The best teacher in the world is experience...now go fly something already
Angler-Hi is offline  
  Reply With Quote
Old 11-25-2008, 10:18 AM   #9
Teslahed
Member
 
Join Date: May 2008
Posts: 56
Thanked 2 Times in 2 Posts
iTrader: (0)
Friends: (1)
Default

If there is too much drag from the PVC pipes you could always try rubbing a little vegitable oil or similar lubricant onto the exposed plastic.

Porbably not necessary with a powerful enough motor though.

.
Teslahed is offline  
  Reply With Quote
Old 11-25-2008, 02:55 PM   #10
lmopar69
Gravity Stinks!!
 
lmopar69's Avatar
 
Join Date: Nov 2005
Location: Newville, Alabama
Posts: 1,427
View lmopar69's Gallery26
Thanked 61 Times in 58 Posts
Send a message via Yahoo to lmopar69
Awards Showcase

Globetrotter Pilot  5kW  100mph Speed Demon 
iTrader: (1)
Friends: (7)
Default

I think it would be better to put a slippery plastic on the bottom of the wing instead of lubing the pvc rails though. Some kinda lube would get messy after awhile.

Laine.

lmopar69 is offline  
  Reply With Quote
Old 11-25-2008, 03:05 PM   #11
FlyingMonkey
Flite Test Fan
 
FlyingMonkey's Avatar
 
Join Date: Apr 2007
Location: 32459
Posts: 8,927
Thanked 306 Times in 293 Posts
Send a message via AIM to FlyingMonkey
Awards Showcase

AP Contest Winner  AV Contest 
iTrader: (0)
Friends: (24)
Default

Originally Posted by lmopar69 View Post
I think it would be better to put a slippery plastic on the bottom of the wing instead of lubing the pvc rails though. Some kinda lube would get messy after awhile.

Laine.

yeah, might as well be flying glow...

Self proclaimed dictator of the Flite Test fan club.
FlyingMonkey is offline  
  Reply With Quote
Old 11-25-2008, 08:48 PM   #12
dmarko
Member
 
dmarko's Avatar
 
Join Date: Jul 2007
Location: Naples. Florida
Posts: 362
View dmarko's Gallery8
Thanked 4 Times in 4 Posts
Club: no club...wherever there is a safe open space
iTrader: (0)
Friends: (10)
Default

Thank all for your suggestions.
Laine.. it is an honor to see your post.
I caught your older threads with your monster size flying wing.
Spectacular!

The PVC launching system was a quick hairbrained idea because of my fears over throwing the homemade wing that I had no idea how it would react. And to minimize unnecessary damage in the early stages of development of the wing. It served well.

Today, through the wonderful supportive posts and knowledge I got from Watt Flyer members, I think the homemade wing is very close to being to being airborne. This prototype has gone thru various stages and alot of tearing apart and rebuilds.

I know I am not reinventing the wheel with this. But a first attempt home "hot wire" cut wing is a cool thing.
And a great learning exercise.

All the Best
To You in the Watt Flyer World.
Dave in Naples
dmarko is offline  
  Reply With Quote
Old 11-25-2008, 10:28 PM   #13
CHELLIE
Super Contributor
 
CHELLIE's Avatar
 
Join Date: Oct 2006
Location: Hesperia, So. Calif
Posts: 18,325
View CHELLIE's Gallery13
Thanked 2,131 Times in 2,040 Posts
Club: Chino Renegades RC Flying Club
Awards Showcase

Scratchbuilders Award  Scratchbuilders Award  Ambassador Award  100mph Speed Demon 
iTrader: (4)
Friends: (306)
Default

Originally Posted by dmarko View Post
Thank all for your suggestions.
Laine.. it is an honor to see your post.
I caught your older threads with your monster size flying wing.
Spectacular!

The PVC launching system was a quick hairbrained idea because of my fears over throwing the homemade wing that I had no idea how it would react. And to minimize unnecessary damage in the early stages of development of the wing. It served well.

Today, through the wonderful supportive posts and knowledge I got from Watt Flyer members, I think the homemade wing is very close to being to being airborne. This prototype has gone thru various stages and alot of tearing apart and rebuilds.

I know I am not reinventing the wheel with this. But a first attempt home "hot wire" cut wing is a cool thing.
And a great learning exercise.

All the Best
To You in the Watt Flyer World.
Dave in Naples
Hi Dave I was looking at your elevons on your wing, they look to be a little wide, you might want to make them 3/4" to 1" wide, being to wide will over control the wing, look at the guys wing on the Video, and notice how wide those elevons are, Hope that helps, Chellie

I may be getting Older, But I Refuse to grow Up I am Having to much Fun to Grow Up LOL
CHELLIE is offline  
  Reply With Quote
Old 11-26-2008, 04:09 AM   #14
lmopar69
Gravity Stinks!!
 
lmopar69's Avatar
 
Join Date: Nov 2005
Location: Newville, Alabama
Posts: 1,427
View lmopar69's Gallery26
Thanked 61 Times in 58 Posts
Send a message via Yahoo to lmopar69
Awards Showcase

Globetrotter Pilot  5kW  100mph Speed Demon 
iTrader: (1)
Friends: (7)
Default

Thanks Dmarko. I had plans to do something similar to what you are working on when I get home, on a larger scale though. The plane I want to launch like that will be rediculously overpowered, but I had planned to do it pretty much exaclty the same way you are.

Nice work man. Glad it is working out for you.

Laine.

lmopar69 is offline  
  Reply With Quote
Old 11-26-2008, 02:25 PM   #15
Buzz_Man
More Flyin' = More Happy
 
Buzz_Man's Avatar
 
Join Date: Aug 2005
Location: NW GA
Posts: 28
View Buzz_Man's Gallery1
Thanked 1 Time in 1 Post
Club: My Front Yard
iTrader: (0)
Friends: (0)
Default

This prototype has gone thru various stages and alot of tearing apart and rebuilds.
Although I have gone through the "design and build from scratch" method, I have such little patience and time in my life right now, I'm more than happy to obtain a proven winner, something that's pretty much guaranteed to work great "out of the box."

I bought two pre-made wings from SuperFlyRC this year and they literally flew "out of the box" - just popped in a battery, insured the control throws were set, and I was in the air.

Some day, I am sure I will get back into the challenge of designing and building my own again. For now, I'll enjoy the efforts of others who are going through the process. Just remember this - you may never end up with a plane that flies very well, even with the "ultimate" in tweaking, drivetrain swaps, & so forth, but you'll have learned a great lesson in the process which, in itself, can be either quite satisfying or terribly aggrivating - depending on your personality, I guess.

On the other hand, when you do design & build your own and you get everything worked out and it flies great you have a feeling that far surpasses anything you could have gained by tossing a "ready to fly" plane out of the box.

Good luck with the plane - don't ever quit trying - try building two or three at the same time and tinkering with them to figure out what works best.

Most of all - enjoy what you're doing - the journey should be enjoyable, even if the destination isn't an oasis after all.

Rx for happiness = r/c flyin
Buzz_Man is offline  
  Reply With Quote
Old 11-29-2008, 05:36 AM   #16
dmarko
Member
 
dmarko's Avatar
 
Join Date: Jul 2007
Location: Naples. Florida
Posts: 362
View dmarko's Gallery8
Thanked 4 Times in 4 Posts
Club: no club...wherever there is a safe open space
iTrader: (0)
Friends: (10)
Default

Buzz Man
Thanks.
Yes. I agree about ARFs and RTF models.
I can never commit to buying online. I think the SUPERFLY is a great buy . Just watched their videos.
My local hobby store doesn't seem to dabble in some of the cool stuff like flying wings and the like.
Closest they have is a ARF Park Zone Stryker too much $$$ when you already have the electronics.

Thanks
Dave
dmarko is offline  
  Reply With Quote
Old 07-25-2014, 12:56 PM   #17
bach939
New Member
 
Join Date: Oct 2006
Posts: 2
Thanked 0 Times in 0 Posts
iTrader: (0)
Friends: (0)
Default

Originally Posted by dmarko View Post
Buzz Man
Thanks.
Yes. I agree about ARFs and RTF models.
I can never commit to buying online. I think the SUPERFLY is a great buy . Just watched their videos.
My local hobby store doesn't seem to dabble in some of the cool stuff like flying wings and the like.
Closest they have is a ARF Park Zone Stryker too much $$$ when you already have the electronics.

Thanks
Dave
I can't find the pict of your launcher.
bach939 is offline  
  Reply With Quote
Old 08-11-2014, 03:00 AM   #18
domerlee
New Member
 
Join Date: Aug 2014
Posts: 12
Thanked 0 Times in 0 Posts
iTrader: (0)
Friends: (0)
Default

I've never use zagi wing, but the other wing that i use it's not any problem.
domerlee is offline  
  Reply With Quote
Reply

  WattFlyer RC Electric Flight Forums - Discuss radio control eflight > Electric R/C Airplanes > Delta & Flying Wings

Tags
hand launch , pvc launcher , wing , zagi

« Previous Thread | Next Thread »

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Supercub Hand Launch Goes Bad Hemi Crash and Safety Forum 1 01-23-2008 04:44 AM
Super Cub hand launch tips? Larry G Beginners 7 07-19-2007 11:33 PM
J3 Piper hand launch Skyburner ParkFlyers 5 06-22-2007 10:12 PM
Left Hand or Right Hand Throttle Peakay Beginners - Helis 4 05-14-2007 02:31 AM
Storm Launcher battery alternative? DrewserBruiser General Electric Discussions 0 12-31-2006 10:36 AM


All times are GMT +1. The time now is 04:56 PM.


Powered by: vBulletin
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright 2005 WattfFlyer.com
RCU Eflight HQ

Charities we support Select: Yorkie Rescue  ::  Crohn's & Colitis Foundation



Page generated in 0.24900 seconds with 59 queries