Go Back   Knife Edge > RealFlight - Designer's Corner > RealFlight 8 - Designer's Corner
Use of this site is subject to our Terms of Use. | Technical Support is available from Great Planes Software Support.

Reply
 
Thread Tools Rate Thread Display Modes
  #16  
Old 05-12-2018, 02:33 AM
technoid's Avatar
technoid technoid is offline
Registered User
 
Join Date: Oct 2014
Location: Texas
Posts: 5,791
Cool pictures and update, and I agree it's nice to know there's a real world plane too. Be sure and update us on how the RF and RW world planes compare.
Reply With Quote
  #17  
Old 05-13-2018, 01:46 AM
Fly_electric's Avatar
Fly_electric Fly_electric is offline
Registered User
 
Join Date: Feb 2012
Location: N-Space side of all Charged Vacuum Emboitments
Posts: 1,375
Thanks guys.
Lots to learn on this journey to be sure..

Only progress during the week was to print the first pass at the vertical part of the cabane struts. For more visualization help, HG'd them on to the card board mock up. Had the Saturday off and went through lasering some DTFB getting the various wing joints and slots correct. Made enough progress there to make the wing assemblies and their 1/8 ply doublers. Struts came out ok, but not sure yet if being FB on this 40" span plane will be strong enough. Rather than make new outer panels with new slots to hold a plywood strut, I may just add some popsicle stick reinforcement on one side--function, not looks is the goal.
Running out of table space in the office, so borrowed the company meeting room table. Realized later it was a good contrast choice to the white FB.

Figure the FBB needs at least some color (if even just for orientation in flight). So taking a page from the guys at Flite Test, am also working on trying my hand at making "skins", having transferred the Draft Sight wing files into PS and added some graghics.

https://www.youtube.com/watch?v=ZyEX...ature=youtu.be

Printing (and maybe mounting) should be this week.
Attached Images
File Type: jpg DSCN0726S.jpg (378.4 KB, 5 views)
File Type: jpg DSCN0727S.jpg (285.8 KB, 5 views)
File Type: jpg DSCN0731S.jpg (286.1 KB, 4 views)
File Type: jpg FFB_wing_skin1S.jpg (59.4 KB, 8 views)
__________________
Rebuilding crashed planes one reset button push at a time..
Reply With Quote
  #18  
Old 05-13-2018, 01:51 AM
technoid's Avatar
technoid technoid is offline
Registered User
 
Join Date: Oct 2014
Location: Texas
Posts: 5,791
Oh.. aren't you just getting cool, love the graphics.
Reply With Quote
  #19  
Old 05-19-2018, 07:32 PM
Fly_electric's Avatar
Fly_electric Fly_electric is offline
Registered User
 
Join Date: Feb 2012
Location: N-Space side of all Charged Vacuum Emboitments
Posts: 1,375
Thinking more about the need for strength in the wing center joints, realized a second carbon fiber rod is needed-- closer to the leading edge. Will have to make the needed adjustments to the Draft Sight files, while the additional CF rods are being delivered.

Also made a first pass at what it takes to make the "skins" to add a wee bit of "bling" to the FBB. Some adjustments are yet needed, but I now understand the basics of how to make them.

Enjoy a great week.
Attached Images
File Type: jpg DSCN0732s.jpg (265.3 KB, 7 views)
__________________
Rebuilding crashed planes one reset button push at a time..
Reply With Quote
  #20  
Old 05-19-2018, 07:45 PM
technoid's Avatar
technoid technoid is offline
Registered User
 
Join Date: Oct 2014
Location: Texas
Posts: 5,791
Quote:
Originally Posted by Fly_electric View Post
Thinking more about the need for strength in the wing center joints, realized a second carbon fiber rod is needed-- closer to the leading edge. Will have to make the needed adjustments to the Draft Sight files, while the additional CF rods are being delivered.

Also made a first pass at what it takes to make the "skins" to add a wee bit of "bling" to the FBB. Some adjustments are yet needed, but I now understand the basics of how to make them.

Enjoy a great week.
Very nice.. it's coming along nicely !
Reply With Quote
  #21  
Old 06-01-2018, 12:58 AM
Fly_electric's Avatar
Fly_electric Fly_electric is offline
Registered User
 
Join Date: Feb 2012
Location: N-Space side of all Charged Vacuum Emboitments
Posts: 1,375
Some more design work (and more card board cut for mockups) on the power section during the holiday.

Had purchased some grooved maple stock for the LG, but changed its installation.
Was originally thinking using it like it is done in the wing of a low wing, but then realized the better way for this design is to place the grooves vertically on either inner side of the fuselage. The LG can then be one piece and slide into the grooves (similar to the Extra's LG). Probably obvious to some, but am still learning...

Some test fits of the battery and ESC in the power section showed the fuselage should be bit wider-- has now increased from 3" at the start to 4". Side benefit with that is some extra area where cooling holes can be added, without compromising the motor mount strength.

That in turn changed the width of the top plywood plates the cabane struts will attach to..

During the visit to the LHS the other evening for other supplies, I saw some DuBro 3" dia micro sport wheels. With spokes, they look a bit nicer than the wheels originally planned. 3" has to be better on grass then the small 2" wheels on the Extra, but if need be 4" wheels can be put on instead.

So, some progress-- might get the power section pieces cut soon.
Carbon fiber rods also came in, and the CAD files have already been adjusted for the second CF rod, so with some free time, should get the new wings cut as well.

RF version has been updated for all the latest changes. Nothing is really mapped yet, so of course the new wheels look odd in the renders.

Enjoy a great weekend.
Attached Images
File Type: jpg FBB render12.jpg (300.8 KB, 7 views)
File Type: jpg FBB render13.jpg (369.8 KB, 7 views)
__________________
Rebuilding crashed planes one reset button push at a time..
Reply With Quote
  #22  
Old 06-01-2018, 01:06 AM
technoid's Avatar
technoid technoid is offline
Registered User
 
Join Date: Oct 2014
Location: Texas
Posts: 5,791
Cool deal it's looking better all the time !
Reply With Quote
  #23  
Old 06-06-2018, 08:25 AM
Fly_electric's Avatar
Fly_electric Fly_electric is offline
Registered User
 
Join Date: Feb 2012
Location: N-Space side of all Charged Vacuum Emboitments
Posts: 1,375
Well, embarrassingly, the RF version is moving along faster than the RW version...
Added more to the CS (still trying different ideas like the wing bottom pattern), and still practicing hovers
Actually, the RF testing continues to help in refining the RW design. For example, it looks like the control surfaces may need to increase a bit and/or the control throws increase.

Enjoy a great rest of the week and weekend.
Attached Images
File Type: jpg ScreenShot1528252066.jpg (480.7 KB, 8 views)
File Type: jpg ScreenShot1528251523.jpg (403.7 KB, 8 views)
File Type: jpg FBB render14.jpg (358.6 KB, 7 views)
File Type: jpg FBB render15.jpg (445.0 KB, 6 views)
File Type: jpg FBB render16.jpg (368.9 KB, 4 views)
__________________
Rebuilding crashed planes one reset button push at a time..
Reply With Quote
  #24  
Old 06-06-2018, 11:08 AM
doug schluter's Avatar
doug schluter doug schluter is offline
Registered User
 
Join Date: Dec 2007
Posts: 2,153
Send a message via AIM to doug schluter
looking forward to trying out your Foam board biplane FE . i know you use RF for all your testing before you fly your RL one so maybe its a good thing you finish it here for us too
Reply With Quote
  #25  
Old 06-06-2018, 11:51 AM
flexible2g's Avatar
flexible2g flexible2g is offline
Registered User
 
Join Date: Oct 2017
Posts: 270
rige it

http://www.knifeedge.com/forums/down...=file&id=23709
This might give you some ideas on set up.
Attached Images
File Type: jpg ScreenShot001.jpg (72.6 KB, 4 views)
Reply With Quote
  #26  
Old 06-06-2018, 01:29 PM
technoid's Avatar
technoid technoid is offline
Registered User
 
Join Date: Oct 2014
Location: Texas
Posts: 5,791
Yes it's looking better all the time. I'm looking forward to playing with this one.

BTW: What happened to your Long John?
Reply With Quote
  #27  
Old 06-09-2018, 10:12 AM
Fly_electric's Avatar
Fly_electric Fly_electric is offline
Registered User
 
Join Date: Feb 2012
Location: N-Space side of all Charged Vacuum Emboitments
Posts: 1,375
Thanks guys. Enjoy a great weekend.

BJF: Thanks for the reminder. I ended up wanting more details like a true built up structure and modeled Yogi. Then started to hit the old triangle limit. With more triangles available now and having learned a few more things, it might be due for a revisit.
Attached Images
File Type: jpg BJF bones.jpg (310.5 KB, 15 views)
__________________
Rebuilding crashed planes one reset button push at a time..
Reply With Quote
  #28  
Old 06-09-2018, 11:52 AM
technoid's Avatar
technoid technoid is offline
Registered User
 
Join Date: Oct 2014
Location: Texas
Posts: 5,791
Quote:
Originally Posted by Fly_electric View Post
Thanks guys. Enjoy a great weekend.

BJF: Thanks for the reminder. I ended up wanting more details like a true built up structure and modeled Yogi. Then started to hit the old triangle limit. With more triangles available now and having learned a few more things, it might be due for a revisit.
You might have just given me my interest in modeling back with that picture. I've always loved old school RC planes and that's all I did in the beginning, design and model my own planes. But recently I moved away from that and did some real planes (to some degree of scale). But maybe my next project should be back to the basics I loved in the beginning. So maybe one of my own designs with a balsa built-up look would be cool. That just might be what I need for my next project. Thanks for posting that picture, and yeah Big John was it.
Reply With Quote
  #29  
Old 06-23-2018, 11:06 PM
Fly_electric's Avatar
Fly_electric Fly_electric is offline
Registered User
 
Join Date: Feb 2012
Location: N-Space side of all Charged Vacuum Emboitments
Posts: 1,375
More progress on the real world and RF FBBs.

Super 77'd the top "skin" to the wings and the wings have been covered in packing tape.
3d printed the cabanes with some square drill guide holes and then drilled those out to the mounting diameter.

Used a piece of scrap foam board to set the spacing between the plywood top wing plates, and bolted on the cabane struts for a test fit to the power box. Then sweated it a bit for a drum roll moment (one several on this project I''m sure): were the holes on the plywood and cabanes placed correctly? Looked correct in Draft Sight....
Sweat stopped as the cabane struts are right where they should be for the width of the assembled power box.. Whew!

Could have positioned the mounting holes on the power box in Draft Sight too, but considering the time to cut and epoxy the power box pieces, that seemed a bit risky as all this CAD stuff is quite new. Have a few ideas how to do it, but one of the next "sweat moments" will be getting those mounting holes correctly drilled--- no expert, but I am pretty sure it's important the wings are square to the fuselage and each other...

As changes are made to the RW FBB, the RF version gets updated. Latest updates are new weight info on the wings as well as cabane struts, and a Max change to reflect were the cabane struts are positioned. For the latter had to make a correction to the top wing mounting plates as two of those struts would have been bolted too close to one of the CF rods...

Enjoy a great and safe rest of the weekend.
Attached Images
File Type: jpg DSCN0770s.jpg (186.3 KB, 3 views)
File Type: jpg DSCN0771s.jpg (205.9 KB, 3 views)
File Type: jpg DSCN0772s.jpg (206.3 KB, 5 views)
File Type: jpg DSCN0773s.jpg (215.8 KB, 5 views)
File Type: jpg DSCN0774s.jpg (208.7 KB, 5 views)
__________________
Rebuilding crashed planes one reset button push at a time..
Reply With Quote
  #30  
Old 06-23-2018, 11:11 PM
Fly_electric's Avatar
Fly_electric Fly_electric is offline
Registered User
 
Join Date: Feb 2012
Location: N-Space side of all Charged Vacuum Emboitments
Posts: 1,375
And some renders.
Attached Images
File Type: jpg FBB render17.jpg (427.4 KB, 6 views)
File Type: jpg FBB render18.jpg (309.0 KB, 4 views)
File Type: jpg FBB render19.jpg (494.5 KB, 4 views)
File Type: jpg 3d print cabane strut.jpg (127.1 KB, 7 views)
__________________
Rebuilding crashed planes one reset button push at a time..
Reply With Quote
Reply

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

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


All times are GMT -4. The time now is 08:40 AM.