Shark XV Build Thread
#1
Thread Starter
My Feedback: (1)
Shark XV Build Thread
This will be a build thread for a scaled up version of my Sure Shark .049 design. The specs are: 40" span; 31.75" length and a .15 for power. We'll have to wait and see how much it weighs.
I always start with the wing; don't ask me why. After removing the ribs from their sheet and sorting them, I pinned down the bottom, Main Spar.
Then I glued the full length ribs to the spar. I needed to place a 3/32" shim under the building tab of the root rib (something I can correct in the laser-cut file, but, it's no big deal).
Next, I glued on the Trailing Edge. It is flush with the top surface of the ribs and does not rest on the board. The first two ribs are 3/32" smaller to accommodate the center-section sheeting and they are centered against the Trailing Edge to allow for the sheeting.
The top Main Spar was glued in next, followed by the false ribs and the top Front Spar. The spars sit up 3/32" above the two center ribs and the sheeting butts against the spars (see photo).
All of this took less than ten minutes.
The next step is to glue on the Leading Edge and add the top center sheeting. Then, the wing can be removed from the board and the bottom Front Spar and bottom center sheeting can be added.
More to come...
David
I always start with the wing; don't ask me why. After removing the ribs from their sheet and sorting them, I pinned down the bottom, Main Spar.
Then I glued the full length ribs to the spar. I needed to place a 3/32" shim under the building tab of the root rib (something I can correct in the laser-cut file, but, it's no big deal).
Next, I glued on the Trailing Edge. It is flush with the top surface of the ribs and does not rest on the board. The first two ribs are 3/32" smaller to accommodate the center-section sheeting and they are centered against the Trailing Edge to allow for the sheeting.
The top Main Spar was glued in next, followed by the false ribs and the top Front Spar. The spars sit up 3/32" above the two center ribs and the sheeting butts against the spars (see photo).
All of this took less than ten minutes.
The next step is to glue on the Leading Edge and add the top center sheeting. Then, the wing can be removed from the board and the bottom Front Spar and bottom center sheeting can be added.
More to come...
David
#2
RE: Shark XV Build Thread
That's a pretty hot Xacto knife you used to cut them ribs out *grin* Looking good so far!
I forgot to tell you, a couple of weekends I went to a fun-fly up here and met tewitt, he had what looked like a SureShark (I forgot to ask him if it actually was).
I forgot to tell you, a couple of weekends I went to a fun-fly up here and met tewitt, he had what looked like a SureShark (I forgot to ask him if it actually was).
#3
Senior Member
Join Date: Jun 2005
Location: Green Bay,
WI
Posts: 322
Likes: 0
Received 0 Likes
on
0 Posts
RE: Shark XV Build Thread
Dave,
This is the thread I've been waiting for!!!!! The .15 size is very appealing to me, can pick up engines still pretty cheap and they are small enough to fly in most fields.
Consider me subscribed and waiting for the short kit!
Jeremiah
This is the thread I've been waiting for!!!!! The .15 size is very appealing to me, can pick up engines still pretty cheap and they are small enough to fly in most fields.
Consider me subscribed and waiting for the short kit!
Jeremiah
#5
RE: Shark XV Build Thread
Looks like it might be a fun size for a TD .09. Hmm. I've got a couple of those new in the box lying around here. What .15 are you planning on using?
#6
Thread Starter
My Feedback: (1)
RE: Shark XV Build Thread
Thanks everyone. I guess I'll use an FP .15. I also have a Super Tigre X.11 that might work.
I sheeted the center section, except for the area where the landing gear trunnions and the ply dihedral brace go.
I glued in the gear trunnion and the ply brace; next, I'll fill in the missing sheeting.
The gear is more for landing than taking off. I will still hand launch the model since my field is grass. It is bent from 1/16" wire to keep the weight down. The wing panel as seen in the third photo with the wire and wheel weighs 2.2ozs (60grms).
David
I sheeted the center section, except for the area where the landing gear trunnions and the ply dihedral brace go.
I glued in the gear trunnion and the ply brace; next, I'll fill in the missing sheeting.
The gear is more for landing than taking off. I will still hand launch the model since my field is grass. It is bent from 1/16" wire to keep the weight down. The wing panel as seen in the third photo with the wire and wheel weighs 2.2ozs (60grms).
David
#7
Join Date: May 2007
Location: sparta, MI
Posts: 467
Likes: 0
Received 0 Likes
on
0 Posts
RE: Shark XV Build Thread
Hi RainDave, That looks real nice. That looks just like what I need. When you sell the kits let me know.
DT, yes, you did see a sure shark sitting at my bench. Terry
DT, yes, you did see a sure shark sitting at my bench. Terry
#9
Thread Starter
My Feedback: (1)
RE: Shark XV Build Thread
Thanks everyone. I've found one goof in the parts so far. I notched the center ribs for a 1/8" thick plywood dihedral brace. But, when I drew up the laser cut file I decided to put all the plywood pieces on one sheet of 3/16" ply to cut down on cost. So, the notches in the two inner ribs need to be 1/16" wider to accept the slightly thicker dihedral brace. No biggie. I also made a small design change by tapering the outer 2" of the ailerons. It looks better and it's supposed to be better aerodynamically, too (see photo).
The wing is done except for installing the aileron torque rods. I know, most people install them before gluing on the trailing edge stock. With symmetrical wings I find it a lot easier to get the TE stock in line with the center line of the airfoil (no up or down reflex) by gluing it on first. Then, I cut a trough in the TE to accept the torque rods and fill over it with balsa and epoxy. It's just as strong and doesn't take any more time than the traditional method. If you use two aileron servos then it makes no difference.
I will get crackin' on the fuse tomorrow.
David
The wing is done except for installing the aileron torque rods. I know, most people install them before gluing on the trailing edge stock. With symmetrical wings I find it a lot easier to get the TE stock in line with the center line of the airfoil (no up or down reflex) by gluing it on first. Then, I cut a trough in the TE to accept the torque rods and fill over it with balsa and epoxy. It's just as strong and doesn't take any more time than the traditional method. If you use two aileron servos then it makes no difference.
I will get crackin' on the fuse tomorrow.
David
#10
RE: Shark XV Build Thread
Dave,
Can't wait to get a short kit, or two, once you're complete. I love my little Shark, but really want to see one just a bit bigger!
Frank
Can't wait to get a short kit, or two, once you're complete. I love my little Shark, but really want to see one just a bit bigger!
Frank
#12
Thread Starter
My Feedback: (1)
RE: Shark XV Build Thread
I appreciate everyone's patience with this project. I got a bit burnt out with building earlier this summer, then my laser parts were slow getting delivered. This project should have been test flow in July, but things don't always work out. Dan is still willing to cut foam cores. I just need to get down to his shop.
Anyway, I obviously need to catch any errors with parts, make a few corrections on the plans, and get in some good test flights before offering anything.
Today was pretty pathetic. I basically bent the aileron torque rods. That's it.[]
David
Anyway, I obviously need to catch any errors with parts, make a few corrections on the plans, and get in some good test flights before offering anything.
Today was pretty pathetic. I basically bent the aileron torque rods. That's it.[]
David
#14
My Feedback: (105)
Join Date: Oct 2003
Location: Hiram GA
Posts: 942
Likes: 0
Received 0 Likes
on
0 Posts
RE: Shark XV Build Thread
Dave, I have 3 of your 1/2 Suresharks and will be patient on this one, I'm in for 1 or 2 just keep us posted. If this one flys as well as the original it will be worth the wait!!! Pete
#15
Thread Starter
My Feedback: (1)
RE: Shark XV Build Thread
Thanks y'all!
The main fuse assembly went together in about 15 or 20 minutes.
I still need to add a few parts like the wing bolt plate and some tri-stock around the firewall. Then, it's on to the fuselage top.
The FP .15 with a round Dave Brown mount is a perfect fit.
David
The main fuse assembly went together in about 15 or 20 minutes.
I still need to add a few parts like the wing bolt plate and some tri-stock around the firewall. Then, it's on to the fuselage top.
The FP .15 with a round Dave Brown mount is a perfect fit.
David
#16
Senior Member
Join Date: Jun 2005
Location: Green Bay,
WI
Posts: 322
Likes: 0
Received 0 Likes
on
0 Posts
RE: Shark XV Build Thread
Dave,
This is great work. Can't wait for this to come to short kit. I think a .15 will be a perfect size for me to get my feet wet again in glow. Been a couple years.
Keep up the good work and keep us informed when you have a short kit ready.
Jeremiah
This is great work. Can't wait for this to come to short kit. I think a .15 will be a perfect size for me to get my feet wet again in glow. Been a couple years.
Keep up the good work and keep us informed when you have a short kit ready.
Jeremiah
#18
Thread Starter
My Feedback: (1)
RE: Shark XV Build Thread
I did a weight check with everything, including the radio gear, switch harness, fuel tank, prop, wheels, etc., and it's 20.6ozs/585grms. I seriously doubt the covering will add 3 1/2ozs so I should come in under 24ozs less fuel or right at it. Performance should be fine. It has 240 sq." of area, so at 24ozs that's a 14.4oz wing loading.
David
David
#19
Senior Member
Join Date: Oct 2004
Location: San Antonio,
TX
Posts: 6,681
Likes: 0
Received 0 Likes
on
0 Posts
RE: Shark XV Build Thread
I see fill 'blocks' ahead of the firewall on the tops of the fuse sides,
what is the story there... muffler clearance notch & fills?
what is the story there... muffler clearance notch & fills?
#20
Senior Member
My Feedback: (1)
Join Date: Oct 2004
Location: Downingtown,
PA
Posts: 629
Likes: 0
Received 0 Likes
on
0 Posts
RE: Shark XV Build Thread
RD - Looks good and your weight is right on! But ya gotta finish this one before you start a Super Pacer thread!
What are your plans for covering and finishing? Koverall & Dope or something else?
EG
What are your plans for covering and finishing? Koverall & Dope or something else?
EG
#21
Thread Starter
My Feedback: (1)
RE: Shark XV Build Thread
Thanks EG. I have ordered the Solartex: translucent orange and blue. It is lighter than the opaque colors. I should have it in a day or two. I want to finish this thing fast and doping will take two weeks at the least (although I prefer that method).
Here's a shot of my scaled-up Wonder with translucent orange Solartex. The translucent blue goes with it nicely.
Also, a pic of the S-XV ready for the bottom sheeting and final sanding.
David
Here's a shot of my scaled-up Wonder with translucent orange Solartex. The translucent blue goes with it nicely.
Also, a pic of the S-XV ready for the bottom sheeting and final sanding.
David
#22
RE: Shark XV Build Thread
Youre killing me Dave. I already bought 4 new planes this year (youre sureshark was one of them) and have one left to build this winter.
I'll be watching closely though, I really like the SureShark and a larger version would be sweeet. I'd love to see the kit include all the wood, I had to go to 3 stores to get all the extra little wood items for the sure shark short kit. I'd gladly pay a little more for all the wood to be included.
I assume this will be a tailwheel landing gear configuration?
-Chris
I'll be watching closely though, I really like the SureShark and a larger version would be sweeet. I'd love to see the kit include all the wood, I had to go to 3 stores to get all the extra little wood items for the sure shark short kit. I'd gladly pay a little more for all the wood to be included.
I assume this will be a tailwheel landing gear configuration?
-Chris
#23
Senior Member
Join Date: Sep 2006
Location: Shawano, WI
Posts: 468
Likes: 0
Received 0 Likes
on
0 Posts
RE: Shark XV Build Thread
Okay, Question. In post #6, in all three pictures, you show a plywood "thing" which appears to be a dihedral brace and also holds the hard wood block for the landing gear. But the plywood piece has a 'slot' in the center which slides over the center rib[s] as shown. Wouldn't the dihedral brace be stronger if it didn't have the 'slot'?? I'm trying to learn here, hence the question.
#24
Senior Member
My Feedback: (1)
Join Date: Oct 2004
Location: Downingtown,
PA
Posts: 629
Likes: 0
Received 0 Likes
on
0 Posts
RE: Shark XV Build Thread
I LIKE the translucent orange. A lot. And hot orange planes, as well as the other cool fluorescent colors (lime green, yellow, aqua blue, etc) are very easy to see!
EG
EG
#25
Thread Starter
My Feedback: (1)
RE: Shark XV Build Thread
ORIGINAL: Yuu
Okay, Question. In post #6, in all three pictures, you show a plywood "thing" which appears to be a dihedral brace and also holds the hard wood block for the landing gear. But the plywood piece has a 'slot' in the center which slides over the center rib[s] as shown. Wouldn't the dihedral brace be stronger if it didn't have the 'slot'?? I'm trying to learn here, hence the question.
Okay, Question. In post #6, in all three pictures, you show a plywood "thing" which appears to be a dihedral brace and also holds the hard wood block for the landing gear. But the plywood piece has a 'slot' in the center which slides over the center rib[s] as shown. Wouldn't the dihedral brace be stronger if it didn't have the 'slot'?? I'm trying to learn here, hence the question.
This wing could be built without the brace to save a bit of weight and would still have all the strength it needs. The joint where the two wing halves mate together is probably the strongest part of the wing. I've never seen a wing separate at that joint if epoxied and wrapped with fg cloth. If it breaks, it will be out from the center section joint.
David