HobbyKing.com New Products Flash Sale
Reply
Thread Tools
Old Jul 16, 2014, 11:39 AM
Registered User
iron eagle's Avatar
United States, MA, Middleboro
Joined Jul 2007
574 Posts
Quote:
Originally Posted by Stupot46 View Post
This is an interesting discussion!Iwas doing a bit on the plank yesterday and I was wondering what effect the underside would have on the flight.Its an under camber,which will presumably give a touch of lift.
I feel the fuselage producing lift can't be a bad thing. I am not sure how much lift it will produce but the shape overall should produce very little drag. Bruce Mathews or Herk S would be far better qualified to answer the questions posed here, as far as aerodynamics I am a relative novice.
iron eagle is offline Find More Posts by iron eagle
RCG Plus Member
Latest blog entry: The third time is a charm!
Reply With Quote
Sign up now
to remove ads between posts
Old Jul 17, 2014, 04:38 AM
InceCreations
vincent123's Avatar
Joined Jul 2009
693 Posts
Ground clearance.

Wheel and tip skids sinked in the grass till solid soil.
Grass estimated about 30mm high.

Clearance at tip still about 1cm.

High enough for good takeoff ?

Vincent
vincent123 is offline Find More Posts by vincent123
RCG Plus Member
Latest blog entry: FZ5: design phase
Reply With Quote
Old Jul 17, 2014, 05:00 AM
I don't like your altitude
Stupot46's Avatar
Joined Sep 2011
3,194 Posts
Hi Vincent,that looks ok;but the drawing doesn't show the u/c strut.Id set that at least 90* measured from the ground as the wing stands,maybe a few degrees more rearward.And go for the biggest wheel you can fit in the fuselage.(one of mine maybe
Thinking back you used a retractable skid on one of your wings;would that be better on grass?
Stupot46 is offline Find More Posts by Stupot46
Reply With Quote
Old Jul 17, 2014, 05:24 AM
InceCreations
vincent123's Avatar
Joined Jul 2009
693 Posts
Tried an all skid flying wing with the FZ3-PT.

It worked ok, but only when the grass is wet and slippery, if not the plane tilts nose down during startup.

The wheel will be a 40mm, like the FZ3.
Since the grass is so close, i decided to close the wheel door when the wheel is out, again copycat from the FZ3 solution. It leaves me with a small hole, but that's ok.
vincent123 is offline Find More Posts by vincent123
RCG Plus Member
Latest blog entry: FZ5: design phase
Reply With Quote
Old Jul 17, 2014, 06:06 AM
I don't like your altitude
Stupot46's Avatar
Joined Sep 2011
3,194 Posts
Neat,that trailing arm looks good.
Stupot46 is offline Find More Posts by Stupot46
Reply With Quote
Old Jul 17, 2014, 11:53 AM
Whisky Powered Brit
Subsonic Mike's Avatar
UK, England
Joined Sep 2009
221 Posts
Slightly off topic but:

May I just ask how well electric retracts fair with grass. I have always been under the impression that electric retracts get their gears shredded by the anything but flat grassy surface...

Keep up the good work,

Michael
Subsonic Mike is online now Find More Posts by Subsonic Mike
RCG Plus Member
Latest blog entry: Advice on flap set up?
Reply With Quote
Old Jul 17, 2014, 12:53 PM
InceCreations
vincent123's Avatar
Joined Jul 2009
693 Posts
Retract is strong enough, i use the E flite.
The wheel and suspension of it, has to be strong enough, correct.

The FZ3 version does the job, although I'll propably use another more solid one for the FZ5.
vincent123 is offline Find More Posts by vincent123
RCG Plus Member
Latest blog entry: FZ5: design phase
Reply With Quote
Old Jul 20, 2014, 02:33 PM
InceCreations
vincent123's Avatar
Joined Jul 2009
693 Posts
Gave shape to the EDF hatch ...
Still a lot to do.
vincent123 is offline Find More Posts by vincent123
RCG Plus Member
Last edited by vincent123; Jul 20, 2014 at 03:14 PM.
Reply With Quote
Old Yesterday, 10:58 AM
Registered User
iron eagle's Avatar
United States, MA, Middleboro
Joined Jul 2007
574 Posts
It looks good so far.
iron eagle is offline Find More Posts by iron eagle
RCG Plus Member
Latest blog entry: The third time is a charm!
Reply With Quote
Reply


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Discussion How well would this canardish jet perform? (just design phase right now) GreenAce92 Foamies (Scratchbuilt) 5 Jan 16, 2009 07:14 AM
More shots with the Depron Dragon and Panasonic DMC-FZ5 CactusJackSlade Aerial Photography 7 Jun 12, 2005 12:46 PM
Yippee! Depron Dragon w/Panasonic DMC-FZ5 - maiden photos CactusJackSlade Aerial Photography 11 Jun 11, 2005 09:37 PM
Depron Dragon's new Panasonic DMC-FZ5 camera set-up - maiden this evening?! CactusJackSlade Aerial Photography 1 Jun 11, 2005 12:30 AM
New A/P Plane - Initial Design Phase Buzz_Man Aerial Photography 4 Apr 21, 2005 12:33 AM