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 > R/C Electric Topics - General > Crash and Safety Forum
Register Members List Wattflyer Extras Articles Search Today's Posts Mark Forums Read Social Groups

Crash and Safety Forum Punch something in lately? Have safety suggestions? Tell the story, share safety tips, and show the pictures here.

Thank you for your support (hide ads)
Reply
 
Thread Tools Display Modes
Old 08-30-2012, 12:17 AM   #1
Nodd
Build something.
 
Nodd's Avatar
 
Join Date: Jan 2012
Location: Connecticut USA
Posts: 362
View Nodd's Gallery3
Thanked 18 Times in 18 Posts
Awards Showcase

Scratchbuilders Award 
iTrader: (0)
Friends: (3)
Default Tip-stall prone Cub

I'd been flying this Piper Cub (from Nitroplanes) for eight months now. She entered a spin around 60 feet up, this was the result...



She was a nice looking plane, lots of scale detail, fair quality parts. She always felt a little on the heavy side though, flew like she had a moderate wing-loading, not very Cub like IMO. She also had a real nasty tendency to tip stall. I played around with the CG, that didn't help. Looking at the wings, there appeared to be zero washout built into the wingtips. That combined with the weight & a short coupled tail meant she was a real handful if stalled. Probably didn't help that I botched a stall turn (hammer head) at around 60', sent her into a nasty spin. As expected at that altitude there wasn't enough room to recover. Also didn't help that I nailed the throttle in hopes of powering out... CRUNCH... right into the dirt.

Oh well. I probably could repair her but I think I'm going to lay her to rest. If she was a nicer flying plane maybe I'd break out the glue but I think I'll salvage the parts & use them in another project.

...and another one bites the dust

Nodd is offline  
  Reply With Quote
Old 08-30-2012, 01:16 AM   #2
rcers
Community Moderator
 
rcers's Avatar
 
Join Date: Jul 2005
Location: Trophy Club TX
Posts: 6,201
View rcers's Gallery57
Thanked 502 Times in 492 Posts
Awards Showcase

WAA-08 Pilot 
iTrader: (4)
Friends: (9)
Default

Nodd CG is a small factor - but I think you hit the issue with the washout. That really helps move the center of stall toward the root not the tip.



Mike
rcers is offline  
  Reply With Quote
Old 09-21-2012, 09:45 PM   #3
Nodd
Build something.
 
Nodd's Avatar
 
Join Date: Jan 2012
Location: Connecticut USA
Posts: 362
View Nodd's Gallery3
Thanked 18 Times in 18 Posts
Awards Showcase

Scratchbuilders Award 
iTrader: (0)
Friends: (3)
Default

All is not lost! I've decided to make a new plane from the remaining parts. You can read about that project here...

Piper Cub Sailplane

Nodd is offline  
  Reply With Quote
Old 09-21-2012, 10:10 PM   #4
JetPlaneFlyer
Super Contributor
 
JetPlaneFlyer's Avatar
 
Join Date: Mar 2009
Location: Aberdeen, Scotland
Posts: 4,433
Thanked 490 Times in 456 Posts
Awards Showcase

5kW  Outstanding Contributor Award  1kW 
iTrader: (0)
Friends: (8)
Default

It looks like it would have fixed up without too much trouble, all the bits seem to be there, just glue the foam bits back together.. Then see if you cant twist a bit of washout into the wings.

Probably too late if you have cannibalised the bits for another project?
JetPlaneFlyer is online now  
  Reply With Quote
Old 09-21-2012, 10:26 PM   #5
Nodd
Build something.
 
Nodd's Avatar
 
Join Date: Jan 2012
Location: Connecticut USA
Posts: 362
View Nodd's Gallery3
Thanked 18 Times in 18 Posts
Awards Showcase

Scratchbuilders Award 
iTrader: (0)
Friends: (3)
Default

Yeah the foam may have been repairable, maybe, but the plastic wing mount & cabin area were a total loss. I'm not too worried about it, the new project should be fun.

Nodd is offline  
  Reply With Quote
Old 10-20-2012, 12:54 AM   #6
Nodd
Build something.
 
Nodd's Avatar
 
Join Date: Jan 2012
Location: Connecticut USA
Posts: 362
View Nodd's Gallery3
Thanked 18 Times in 18 Posts
Awards Showcase

Scratchbuilders Award 
iTrader: (0)
Friends: (3)
Default

UPDATE
Well I've completed my recycled Cub project. I built this cute little Cub sailplane using the Cub's wing & tailfeathers...



If you're interested here's the build log & video...

Cub Sailplane - Build Log

Cub Sailplane - Flight Footage

Nodd is offline  
  Reply With Quote
Old 10-20-2012, 01:37 AM   #7
gramps2361
Community Moderator
 
gramps2361's Avatar
 
Join Date: Dec 2008
Location: oxford, MA
Posts: 6,674
View gramps2361's Gallery9
Thanked 602 Times in 597 Posts
Club: Rocky Hill Flying Circus
iTrader: (3)
Friends: (21)
Default

Nod great job recycling the cub into a glider I enjoyed following your build thread on this cub conversion.
I was checking out some old kits from a kit cutter and came across the Guppy glider made me think of your cub.
Well done so what's next?
gramps2361 is online now  
  Reply With Quote
Old 10-20-2012, 04:51 AM   #8
Nodd
Build something.
 
Nodd's Avatar
 
Join Date: Jan 2012
Location: Connecticut USA
Posts: 362
View Nodd's Gallery3
Thanked 18 Times in 18 Posts
Awards Showcase

Scratchbuilders Award 
iTrader: (0)
Friends: (3)
Default

Thank you. Yeah I like the Guppy too. Although I've not built or flown one its possible my Cub design was somewhat influenced by that plane. I also kept guppies in my fish tank for many years too. I guess I just like that shape ><>

I have a few things going on right now. I'm putting together a profile foamy combat plane so I can compete against my club mates. Videos of that begin here. I'm also still working on my electric sailplane build. The latest info on that can be found here. Once that's complete I'm planning to build a Spitfire although there's a twist (not saying what it is yet). Then next on the list is a model of my sister's boyfriend's full scale bi-plane (again not giving away too many details just yet). Then I'd like to start work on a whacky canard, twin pusher design I've been playing around with in my flight-sim design software. And assuming I get all that done, I have a very special sailplane design in mind but that's top-secret for now *evil grin*. Well that's what I have planned, I'm sure they're be all sorts of other projects popping up too.

Nodd is offline  
  Reply With Quote
Old 10-23-2012, 02:08 AM   #9
gramps2361
Community Moderator
 
gramps2361's Avatar
 
Join Date: Dec 2008
Location: oxford, MA
Posts: 6,674
View gramps2361's Gallery9
Thanked 602 Times in 597 Posts
Club: Rocky Hill Flying Circus
iTrader: (3)
Friends: (21)
Default

Sounds like you have a full schedule for the upcoming months of cold and darkness. That will keep you busy designing and building hope you post up with some of it here.

Ya I had guppies too. They were easy to keep, and reproduced like rabbits.
gramps2361 is online now  
  Reply With Quote
Reply

  WattFlyer RC Electric Flight Forums - Discuss radio control eflight > R/C Electric Topics - General > Crash and Safety Forum

« 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
Up and stall, and up and stall, and up and stall... RobWoodall Beginners 43 08-16-2012 10:18 PM
40 size electric cub hybrid General Electric Discussions 16 02-12-2011 09:35 PM
wing tip shape pattern14 Aerodynamics 14 12-28-2010 02:45 PM
super cub to a warbird? corvette Beginners 17 12-27-2010 06:01 AM
For Sale HZ Mini Super Cub All American Airplanes - Electric For Sale & WTB 2 02-08-2010 09:17 PM


All times are GMT +1. The time now is 05:52 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 0.19656 seconds with 35 queries