Questions and Answers If you have general RC questions or answers discuss it here.

Weight issue

Reply

Old 02-04-2003, 06:22 PM
  #1  
ebeygin
Senior Member
Thread Starter
 
Join Date: Sep 2002
Location: Toronto, ON, CANADA
Posts: 196
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default Weight issue

Hi again!

Quick question.. a stock version of a 4*60 is 7.5-8 lbs..

By sheeting the wings with 1/16 balsa.. sheeting the turtledeck.. making round sides for the fuselage..reinforcing the gear.. and making a balsa cowl..
How much weight will that add to the plane??

I have a .91 Magnum four stroke...

How much extra weight is acceptable with this plane and this engine?

-eugn
ebeygin is offline  
Reply With Quote
Old 02-04-2003, 06:40 PM
  #2  
MinnFlyer
Senior Member
My Feedback: (4)
 
MinnFlyer's Avatar
 
Join Date: Apr 2002
Location: Willmar, MN
Posts: 28,519
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default Weight issue

It won't make it so heavy that it won't fly well, it just won't be as light. Some people prefer a plane to have a little weight to it. I do on some models, but a 4* wouldn't be my first choice to weigh down with a lot of extras.
MinnFlyer is offline  
Reply With Quote
Old 02-05-2003, 06:58 AM
  #3  
ebeygin
Senior Member
Thread Starter
 
Join Date: Sep 2002
Location: Toronto, ON, CANADA
Posts: 196
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default Weight issue

thanks

why do they like the extra weight?
ebeygin is offline  
Reply With Quote
Old 02-05-2003, 02:53 PM
  #4  
MinnFlyer
Senior Member
My Feedback: (4)
 
MinnFlyer's Avatar
 
Join Date: Apr 2002
Location: Willmar, MN
Posts: 28,519
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default Weight issue

So they're not as "Floaty". A heavier plane can penetrate the wind better.
MinnFlyer is offline  
Reply With Quote
Old 02-05-2003, 05:20 PM
  #5  
ebeygin
Senior Member
Thread Starter
 
Join Date: Sep 2002
Location: Toronto, ON, CANADA
Posts: 196
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default Weight issue

good point..

thanks minnflyer!
ebeygin is offline  
Reply With Quote
Old 02-08-2003, 01:54 AM
  #6  
greenboot
Senior Member
My Feedback: (1)
 
Join Date: Jan 2002
Location: St Louis, MO
Posts: 1,176
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default Weight issue

Eugn, I love to argue the "other" side! The changes you mentioned would add 3 ounces, I just weighed the balsa. It would look nice and make your 4 Star special. If necessary, you can recoup that much weight with light weight wheels or using a smaller fuel tank.

I recommend you "dress up" that bird!
greenboot is offline  
Reply With Quote
Old 02-09-2003, 06:51 PM
  #7  
Giant Scale
Senior Member
 
Join Date: Jun 2002
Location: Baltimore, MD
Posts: 856
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default Weight issue

greenboot,
what about the glue??
Giant Scale is offline  
Reply With Quote
Old 02-09-2003, 09:43 PM
  #8  
Ed_Moorman
My Feedback: (1)
 
Ed_Moorman's Avatar
 
Join Date: Jan 2002
Location: Shalimar, FL
Posts: 4,059
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default 4-Star 60

I wouldn't worry about the little extra weight you are adding. The 4-Stars really have too much wing. They fly trainer-like unless you clip the tips 1 rib.

Mine has been bashed extensively from stock sort of like a Kawasaki Tony. It is overweight, but flies great. Here is the bashing:
2 ribs removed each side & 1 1/2 width rounded tips added back.
Three 1/8 aircraft ply half ribs added to hold hardwood landing gear blocks added.
3/16 wire gear in the wings.
Balsa and ply gear doors.
Rudder, stab and elevators extended.
Servos relocated to the rear.
2-56 bracing wires on bottom of stab.
Leaf spring type tail gear.
Balsa block cowl.
Airplane is painted with LustreCoat over orange Monokote. (When I bought it, it was orange.)
CB spinner-plastic front, aluminum backplate.
Magnum .91XLS with Ultra Thrust muffler, APC 14-6 prop.

I have flown a lot of planes since I started in 1950 and this isn't a 3D plane, but it is one of the best flying planes I have owned. I bashed my first one and immediately bought a buddy's that was built stock and modified it like my original.

This plane rolls down the runway like it was on rails, takes off and accelerates straight up. It knife edges all day, snaps, flat spins, does all the standard acro. And it lands really nicely. I think my next one will have retracts and I think the little bit of extra weight from your few mods won't make any difference.
Attached Thumbnails Click image for larger version

Name:	53999_1489.jpg
Views:	10
Size:	63.5 KB
ID:	32526  
Ed_Moorman is offline  
Reply With Quote

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


Thread Tools
Search this Thread

Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service