Go Back  RCU Forums > RC Airplanes > "1/2 A" & "1/8 A" airplanes
Reload this Page >

Got a Sure Shark to build?

Notices
"1/2 A" & "1/8 A" airplanes These are the small ones...more popular now than ever.

Got a Sure Shark to build?

Old 04-12-2007, 05:25 PM
  #1  
Mr67Stang
Thread Starter
 
Mr67Stang's Avatar
 
Join Date: Apr 2006
Location: Raeford, NC
Posts: 3,822
Likes: 0
Received 0 Likes on 0 Posts
Default Got a Sure Shark to build?

I know some of us have purchaces Sure Shark kits at the very generous offering from Rainedave. I got mine today while the wife was at work so I will let her believe that I have had this kit for a long time and am just now going to start the build. I feel we can use this thread, all of us SS builders to post our questions, tips, modifications and other findings here. I recently found out that I may not be going back to Iraq untill July so My hope is to get this plane together and fly it in the unlimited class of the CC races this May 5th. So in the venerable word of Larry the Cable Guy, it's time to "Git 'r Done".
Old 04-12-2007, 05:45 PM
  #2  
rainedave
My Feedback: (1)
 
rainedave's Avatar
 
Join Date: Jul 2005
Location: Richmond, VA
Posts: 6,344
Likes: 0
Received 1 Like on 1 Post
Default RE: Got a Sure Shark to build?

Thanks, Mr67Stang.

I'll stay tuned to answer any questions. I've added templates for the top pieces.
Attached Thumbnails Click image for larger version

Name:	Sq46144.gif
Views:	17
Size:	29.8 KB
ID:	662832  
Old 04-12-2007, 05:46 PM
  #3  
pt40crasher
Senior Member
 
pt40crasher's Avatar
 
Join Date: Nov 2006
Location: , CA
Posts: 312
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Got a Sure Shark to build?

Mine is on the way. No final decision on the powerplant yet.
Old 04-12-2007, 10:24 PM
  #4  
brocja01
Senior Member
 
brocja01's Avatar
 
Join Date: Jun 2005
Location: Green Bay, WI
Posts: 322
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Got a Sure Shark to build?

Consider me subscribed!!! Mines on the way as well. Can't wait to get it started. My parents are coming down from WI so my Dad and I are going to work on it together. Can't Wait!
Old 04-12-2007, 10:45 PM
  #5  
rainedave
My Feedback: (1)
 
rainedave's Avatar
 
Join Date: Jul 2005
Location: Richmond, VA
Posts: 6,344
Likes: 0
Received 1 Like on 1 Post
Default RE: Got a Sure Shark to build?

Well, I just found one small issue on the plans today.

I had to shorten the fuselage by 1/8" for the laser cutting to fit on 24" sheets (saved me money). And somehow, I overlooked this:

Former #3 needs to be installed 1/8" forward of the location shown on the plans. The former needs to clear the horizontal stab slot in the fuselage sides. Basically, the stab slot was moved forward 1/8" and the plans don't reflect that change. In other words, the front edge of the stab butts up against the back of former #3.

In the image the Red lines show the actual shape of the laser cut sides. The end of the fuselage simply got moved 1/8" forward to fit on the balsa sheets.
Attached Thumbnails Click image for larger version

Name:	Ge94612.gif
Views:	13
Size:	11.1 KB
ID:	663048  
Old 04-13-2007, 01:51 PM
  #6  
Mr67Stang
Thread Starter
 
Mr67Stang's Avatar
 
Join Date: Apr 2006
Location: Raeford, NC
Posts: 3,822
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Got a Sure Shark to build?

He Dave, I have the plans streatched out over my building board and starting to get my tools and supplies together. First question for you. The templates that I received from you for the top side indecate the use of 3/32 a grane balsa sheeting. Seems a bit thick to me is it really 3/32, or is that a typo?
Old 04-13-2007, 02:58 PM
  #7  
rainedave
My Feedback: (1)
 
rainedave's Avatar
 
Join Date: Jul 2005
Location: Richmond, VA
Posts: 6,344
Likes: 0
Received 1 Like on 1 Post
Default RE: Got a Sure Shark to build?

I used 3/32" on both of mine. The reason is that I ended up sanding the seam along the top quite a bit and 1/16" would have been too thin. But, go with 1/16" if you want. I really don't think there's a noticeable weight difference.

A note about the fuselage construction:

The 3/16" top is actually a jig that ensures a straight and square build. It's just a jig that happens to become part of the plane (I borrowed this method from Joe Bridi's designs). It's the most ingenious method of fuselage construction I've ever come across in 40yrs. of building balsa models, so I used it for the SS.

Here are some photos of what I did last night:
Old 04-13-2007, 03:02 PM
  #8  
brocja01
Senior Member
 
brocja01's Avatar
 
Join Date: Jun 2005
Location: Green Bay, WI
Posts: 322
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Got a Sure Shark to build?

Where did the photos' go Dave?
Old 04-13-2007, 03:10 PM
  #9  
rainedave
My Feedback: (1)
 
rainedave's Avatar
 
Join Date: Jul 2005
Location: Richmond, VA
Posts: 6,344
Likes: 0
Received 1 Like on 1 Post
Default RE: Got a Sure Shark to build?

I'll try again...
Attached Thumbnails Click image for larger version

Name:	Jh14449.jpg
Views:	16
Size:	84.9 KB
ID:	663390   Click image for larger version

Name:	Wr56066.jpg
Views:	17
Size:	82.7 KB
ID:	663391   Click image for larger version

Name:	Ty63909.jpg
Views:	19
Size:	82.7 KB
ID:	663392   Click image for larger version

Name:	Ic85362.jpg
Views:	18
Size:	81.5 KB
ID:	663393   Click image for larger version

Name:	Co80465.jpg
Views:	18
Size:	80.9 KB
ID:	663394   Click image for larger version

Name:	Yo91296.jpg
Views:	16
Size:	82.1 KB
ID:	663395   Click image for larger version

Name:	Ay76141.jpg
Views:	16
Size:	82.3 KB
ID:	663396  
Old 04-13-2007, 03:11 PM
  #10  
rainedave
My Feedback: (1)
 
rainedave's Avatar
 
Join Date: Jul 2005
Location: Richmond, VA
Posts: 6,344
Likes: 0
Received 1 Like on 1 Post
Default RE: Got a Sure Shark to build?

And a couple more...
Attached Thumbnails Click image for larger version

Name:	Tr51271.jpg
Views:	25
Size:	84.3 KB
ID:	663397   Click image for larger version

Name:	Hd94997.jpg
Views:	17
Size:	76.6 KB
ID:	663398  
Old 04-13-2007, 03:35 PM
  #11  
pt40crasher
Senior Member
 
pt40crasher's Avatar
 
Join Date: Nov 2006
Location: , CA
Posts: 312
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Got a Sure Shark to build?

The postman just delivered mine! I'll get started tonight. Nicely packaged and protected by the way. Laser cutting looks great.
Old 04-13-2007, 03:38 PM
  #12  
brocja01
Senior Member
 
brocja01's Avatar
 
Join Date: Jun 2005
Location: Green Bay, WI
Posts: 322
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Got a Sure Shark to build?

pt40...

When did Dave send yours out? Just seeing if I can expect mine today or not.
Old 04-13-2007, 04:22 PM
  #13  
rainedave
My Feedback: (1)
 
rainedave's Avatar
 
Join Date: Jul 2005
Location: Richmond, VA
Posts: 6,344
Likes: 0
Received 1 Like on 1 Post
Default RE: Got a Sure Shark to build?

All were mailed together.

I just weighed all of the wood components ready to cover, including the aileron torque rods and elevator pushrod. It all comes out to 3.75ozs. I may get this one under 10ozs AUW.
Attached Thumbnails Click image for larger version

Name:	Us55362.jpg
Views:	17
Size:	86.9 KB
ID:	663422  
Old 04-13-2007, 05:26 PM
  #14  
Mr67Stang
Thread Starter
 
Mr67Stang's Avatar
 
Join Date: Apr 2006
Location: Raeford, NC
Posts: 3,822
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Got a Sure Shark to build?

I just got back from my LHS with the shopping list of wood provided by Dave, thank you, and the wood ended up being about $24 but I also picked out some Hitech HS-65HB servos (w/carbonite gears), the torque rods, DB motor mount and a couple of props so the bill jumped from there Thanks for the pictures of how to put the Top Sides Sheeting together.

Is there anyone creative enough here to come up with a "Sure Shark" logo. I have a little graphics/sign shop down the road from me that could print them out on vynal for us with transfer tape. I was going to do something myself but thought I would test the waters and see if we could all agree on something for a uniform logo. It would of course have to pass Rainedave's aproval.
Old 04-13-2007, 06:07 PM
  #15  
rainedave
My Feedback: (1)
 
rainedave's Avatar
 
Join Date: Jul 2005
Location: Richmond, VA
Posts: 6,344
Likes: 0
Received 1 Like on 1 Post
Default RE: Got a Sure Shark to build?

Yikes! You should order from Lone Star. It would have been less than $4 worth of balsa.[X(] But, that's not counting hardware, of course.

I have so much scrap sitting around I never bothered to add up the bill of materials. This is just what I keep under my building table. There's at least twice as much more packed away in boxes.
Attached Thumbnails Click image for larger version

Name:	Us53938.jpg
Views:	13
Size:	79.5 KB
ID:	663502  
Old 04-13-2007, 06:46 PM
  #16  
rainedave
My Feedback: (1)
 
rainedave's Avatar
 
Join Date: Jul 2005
Location: Richmond, VA
Posts: 6,344
Likes: 0
Received 1 Like on 1 Post
Default RE: Got a Sure Shark to build?

Here's a photo of the wing construction.

The 1/16" center sheeting is fitted between the middle spar and rear spar. The center ribs (#1) sit on top of it. The bottom front spar is added after you remove the panel from the board (unless you can crawl under the LE to glue it up in place). It's easier to add the false ribs after the two top spars are glued in place (they hold them in position). Don't forget that the false ribs have a top and bottom; they are not symmetrical. The LE won't fit right if they are upside down. Check them against the outline on the plans before gluing.

Don't omit the gussets. They actually add a lot of strength.
Attached Thumbnails Click image for larger version

Name:	Pn35487.jpg
Views:	15
Size:	80.4 KB
ID:	663542  
Old 04-13-2007, 07:24 PM
  #17  
rv7driver
My Feedback: (104)
 
rv7driver's Avatar
 
Join Date: Oct 2003
Location: Dallas, GA
Posts: 936
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Got a Sure Shark to build?

hope mine gets here tomorrow, ready to get this puppy started!! dave it looks soooo gooood!!!! Pete
Old 04-13-2007, 10:42 PM
  #18  
Mr67Stang
Thread Starter
 
Mr67Stang's Avatar
 
Join Date: Apr 2006
Location: Raeford, NC
Posts: 3,822
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Got a Sure Shark to build?

So, How do you think the flight charachtoristics would change with less or even no wing dihedral? I imagine the twitchy factor would rise but the self correcting/uprighting should go away. Kind of looking for a point and shoot effect as this wing is reminding me of the Sig Something Extra but thinner (aka faster).
Old 04-13-2007, 10:48 PM
  #19  
digital_trucker
 
digital_trucker's Avatar
 
Join Date: Feb 2006
Location: Dorr, MI
Posts: 1,457
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Got a Sure Shark to build?

Actually, a slight bit of dihedral is good in a low-wing setup. Helps to counteract the pendulum effect. Just enough to prevent the droopy look usually suffices.
Old 04-13-2007, 11:10 PM
  #20  
rainedave
My Feedback: (1)
 
rainedave's Avatar
 
Join Date: Jul 2005
Location: Richmond, VA
Posts: 6,344
Likes: 0
Received 1 Like on 1 Post
Default RE: Got a Sure Shark to build?

Keep the dihedral, or maybe use 3/4" per side. You will love the way it flies. Trust me. And you'll love even more, the way it glides deadstick (all my landings are deadstick). The dihedral does not effect the planes maneuverability at all. It goes where you point it and stays in whatever attitude you put it in.
Old 04-13-2007, 11:22 PM
  #21  
digital_trucker
 
digital_trucker's Avatar
 
Join Date: Feb 2006
Location: Dorr, MI
Posts: 1,457
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Got a Sure Shark to build?

It sure sounds like it flies the same as my old US40 - probably of the same lineage, I'd wager.
Old 04-13-2007, 11:38 PM
  #22  
rainedave
My Feedback: (1)
 
rainedave's Avatar
 
Join Date: Jul 2005
Location: Richmond, VA
Posts: 6,344
Likes: 0
Received 1 Like on 1 Post
Default RE: Got a Sure Shark to build?

d_t, there is a common lineage: the Kaos. The US series used a Kaos wing and tail moment with a new turtledeck/canopy design. The Sure Shark has a totally different wing, but a tail moment and tail surface areas based on the Kaos, which explains why it tracks so well.

Mr67Stang, the Somethin' Extra having a thick, symmetrical airfoil flies good without dihedral. The NACA 2412 - a semi-symmetrical airfoil - on the SS just seems to like having dihedral.

If you really want to build a symmetrical wing without dihedral I can send you the drawings for one that I actually built for the SS. Here're some photos of it. It has an 11% root (NACA 0011) and a 13% tip (NACA 0013). It lowers drag and weight and increases speed.
Attached Thumbnails Click image for larger version

Name:	Xv63634.jpg
Views:	18
Size:	83.6 KB
ID:	663728   Click image for larger version

Name:	Up47313.jpg
Views:	18
Size:	98.0 KB
ID:	663729   Click image for larger version

Name:	Kp33962.jpg
Views:	16
Size:	87.3 KB
ID:	663730  
Old 04-14-2007, 12:34 AM
  #23  
rainedave
My Feedback: (1)
 
rainedave's Avatar
 
Join Date: Jul 2005
Location: Richmond, VA
Posts: 6,344
Likes: 0
Received 1 Like on 1 Post
Default RE: Got a Sure Shark to build?

d_t, someone just started a thread on the US/Kaos. I wasn't aware of this until now, but the old Tower Kaos 60 kit actually came with the turtledeck formers to make it into an Ultra Sport:

http://www.rcuniverse.com/forum/m_5712730/tm.htm
Old 04-14-2007, 01:53 AM
  #24  
pt40crasher
Senior Member
 
pt40crasher's Avatar
 
Join Date: Nov 2006
Location: , CA
Posts: 312
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Got a Sure Shark to build?

I got nothing accomplished. I had a dirty shop cleaning freakout which will probably last a day or two.[:@]
Old 04-14-2007, 11:00 AM
  #25  
brocja01
Senior Member
 
brocja01's Avatar
 
Join Date: Jun 2005
Location: Green Bay, WI
Posts: 322
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Got a Sure Shark to build?

Dave,

I got mine in the mail this morning. Very well packaged. I'm hoping that since the wife will be out of town this afternoon, me and the rugrat will head the LHS and pick up the rest of the balsa. I'm hoping to get most of the pieces cut out tonight after the kid goes to bed.

Maybe even start doing some glueing on the 1st half of the wing.

Thanks for the quick shipment. Where do you go through to get your lasering done? I have so many plans out there that I just don't have time to draw on wood and then cut out and then spend the time to fix my horrible cutting skills. @ $20 to $30 bucks for a small plane like this to have cut wouldn't be a problem with me.

Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -

Copyright 2021 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.