S3B Viking
 

Does anyone know the source for Lockheed's S3B Viking model plans or good 3 Views?

RE: S3B Viking
 

A CNC Kit „Lockheed S3 Viking” is produced by http://www.keiro.ch/e_Beschreibung_viking.html

greets
Frank

RE: S3B Viking
 

Rich Uravitch has plans coming very soon for and EDF or prop version of the Viking. I talked to Hobby Hangar a few weeks ago and they told me very soon. Here is a video of the EDF version. Very cool.

EDF http://www.rcuvideos.com/video/S-3-wmv


You can see some info on it on his site @ www.richuravitch.com or www.hobbyhangar.com


I would like to have one as well. Hobby Hangar is going to sell the plans parts and wood kits as well the Viking has a 60' wing span go to product spec's on the Rich's site to see the spec's for the Viking. Pic Below

RE: S3B Viking
 

Nav-air,
Shoot me your email address. I may be able to help you. I have a pretty good set of 3-views with cross sections i have been using to scratch a 1/9 version.
You can enlarge or reduce however you like. Mine is going slow right now, i got side tracked and started a Yellow F-15.
My plan was to use 2 100mm fans, and to come up with my own landing gear, etc.
Anyhow, these might help you.
Let me know if you are interested.
Scott

S-3 Viking build
 

I flew the S-3 for 26 years and always wanted to build an RC model of it. I have started building the Keiro Viking and it is a great kit so far. The kit comes with fiberglass nose cone, canopy, nacelle covers and engine tailpipes as well as all balsa parts laser cut. I will post pictures of my build progress as I can, but if you are interested in building an S-3 model, you should consider this kit.here is how I began building the fuselage:

S-3 Viking build
 

Here are several more pictures of my fuselage build. The stablizer section is built as a bolt on module.

viking build
 

After building the fuselage according to Keiro's directions, it was time to begin building the wing. Attached are some photos of that process. I made changes to the design in two areas. I made the ailerons a bit shorter and consequently had to move the servo compartment outboard one rib. I also chose to hinge the aileron differently so I needed more wood between ribs to accomodate that. The main reason for making the ailerons shorter, was so I could build some semi-scale flaps. Instead of building the fowler flaps that would be correct & scale, I chose to build slotted flaps because they are considerably less complicated and look almost the same. So I made changes to the wing build in that area also and added some larger pieces of balsa between ribs the length of the flaps so that I would have some wood to glue hinges into.

Viking Build
 

Here are some pictures of the covering work done on the wing and rudder. The humps on the back of the wing make the wing fit very nicely.

Nice looking build! What are you going to run in it? Looks like a good candidate for wemotec mini fans and het 2w25. Plenty of room for the battery in that fuse. Where is the battery access/hatch?

S3
 

Mkikta, thanks for your response, I have in fact purchased a keiro kit, not very far along however,
keep posting those build photos. I plan on using the wemotec 2w-20 mtrs and the new evo 70mm fans.
nav-air

2walla & nav-air,I installed 2 wemotec mini evo fans. I have already installed them in the nacelles but have not had a chance to post any more pictures due to work schedule and travel. I purchased 2 HET 2w-22 motors and also two 2w-25 motors because I was so undecided on what I wanted. i have decided to try the 2w-22 motors first. I bench tested the 2w-22 this past weekend in one nacelle with a 4 cell battery and got the numbers of 45amps, 750 watts and pulled about 2.5lbs ea. Don't have my notes handy but I believe those were the figures. So if I can keep the plane on the lighter side, that should be good enough. I do not plan to remove the wing for battery placement, I plan right now to make the canopy removable so I can charge the pneumatic retracts and replace the battery(s) under the canopy. I may use 2 batteries in parrallel, not sure yet. I have the wings complete, tail module complete and waiting to install the retracts. I have started strengthening the fuse around the retract mounts but can't go any further until I get the retracts. I am having them custom made from RC Crafters in Ohio,and beleve they were shipped today. Can't wait to get them and install them. I will use the VS-32 paint scheme used during "Desert Storm", all gray.Glad to see there are others building this kit, there is very little on-line about building/flying Viking rc.Mkikta

I'd love to see pics of the gear from RC crafters when you get them.

S-3 Viking Build
 

Attached are more wing photos. Somehow the order got screwed up but you can see my servo mounts. I moved the aileron servo outboard 1 rib. That area of the wing gets pretty thin and it was difficult to make the hole in the inboard rib large enough for the servo plug. Even though I made the ailerons smaller, they are still a bit larger than scale. The full scale S-3 aircraft used spoilers to augment the ailerons so I was afraid to make the ailerons any smaller. I contacted Kurt at Keiro and asked if he thought I could reduce aileron size without issue and he said yes. Again although out of order, I also included 3 pictures of the flaps that show them up, 1/2 and full down. You can see how I hinged the flaps as slotted flaps are normally hinged. The flaps are actuated through a hole in the wing trailing edge which allows me to push the flaps down and pull them up.

S-3 Viking Build
 

Here I have attached some pictures of building the engine nacelles. Here you can see one nacelle from beginning to end. It was painted with Dupont auto paint and then topcoated with testor's dullcoat. I made the decals on my computer and placed them on the nacelle prior to spraying the dullcoat.

S-3 Viking Build
 

Attached are photos of the wing, engines and tail module completed and covered. I covered everything with Ultracoat Light Gray HANU 882 and Testors Dullcoat. The VS-32 rudder checkerboard was painted on top of the Ultracoat and then dullcoated.

MKikta, enjoyed the photos very much and they also provided some insight as I progress with my S3 albeit slow, I like the flap arrangement, perhaps I may contact you for flap/aileron construction help.
I had considered scuffing the ultracote covering with oooo steel wool then painted, as I have in the past with monocote with great success, don't know about ultracote
Keep the photos coming
nav-air

S-3 Viking Build
 

I have done this with Ultracoat on several models with great success. I go to the Dupont Auto Paint store and get the finest sanding pads they have and they work great.

S-3 Viking Build
 

I have finally received my retracts from RC Crafters. So far I love them. Here you can see the entire retracts package on the dark matt. After I positioned the aircraft for a scale fit of the retracts, I taped the mains in position to drill the holes required. You can see that when the gear retracted, it hit rib 10. I installed a rib I call 10.5 before removing the bottom half of rib 10, and relocated longerons on the side and the bottom to act as retracts bay edging and also distribute the stress along the fuselage. You can see I also added some strength along the centerline with a brace between ribs 8 and 10.5. I also removed the circular portion of the center brace on rib 10 so the wheels would fit in the bay and glued another center brace over the remaining portion of rib 10 center brace from the bottom center longeron to the top center brace between ribs 9 and 11. This will also provide a solid STOP for the wheels to bounce against when retracting if needed. The last photo shows the gear in the retracted position.




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S-3 Viking Build
 

Attached here are more photos showing my retracts installation progress to date. Note how large I had to make the nose gear opening so the strut and double wheels would easily fit going in and out. Because of the length of the nose wheel strut, I was forced to raise the nose gear mounting plate considerably. You can see the nose retract in both the down and up positions. I think it fits quite well. Because I had to make the opening so large, I do not think the doors will meet in the center when closed, that is if I want them to look scale at all. I think that it make work out well though since I need to find some way to get positive airflow into the fuselage for the batteries and ESCs. Then maybe I can drill out the sonobuoy chute holes on the bottom and that will give me the air exhaust I need.

Mkikta, thanks for posting the photos, the landing gear look simply fantastic, they also resemble the A7 gear, there probably was some collaboration with Vought.
It appears that you are having to make some extensive modifications to the airframe to accommodate the gear.
did you provide RC crafters with scale drawings of the gear if so perhaps you might consider sharing, I will have to study your text more carefully The installation looks very good and now I am wondering
what effect the take off rotation is going to be with the mains quite far behind the C.G.
I anxiously await further progress.
nav-air

S-3 Viking build
 

nav-airI can say for sure since I flew the full size viking for 26 years, that Vought designed the S-3 landing gear so that's why it resembles A-7 gear a lot. These retracts in my picture are basically RC Crafters 1/10 scale A-7 gear slightly modified to look more like S-3 gear. I sent them lots of pictures of S-3 landing gear and Ed at RCCrafters made some changes to make them look more scale . The A-7 had a bit smaller(less beefy) gear than the S-3 since the S-3 was heavier. So I figured the 1/10 scale A-7 gear should work well in the 1/14 scale S-3. I checked with Kurt at Keiro and he concurred and had actually looked at them as potential retracts for his Viking a number of years earlier. So I purchased them. I'm not too worried about any effects on the CG at this point, especially since the nose gear package is pretty heavy. I'll set the balance up with the mains retracted. I am more concerned about the total weight added to the aircraft actually. That's one reason why I don't intend to do any fiberglassing of the fuselage, just balsa and Iron on covering. As far as rotation goes, all of that will be happening pretty quickly with that big wing and as long as no over rotation occurs, there will be no issues, I'm pretty confident of that. Never was in the real aircraft.I am also concerned about the landing gear being in the fuselage vs in the wing when it comes to stability at touchdown. Don't want that big wing tip touching the ground on landing. The A-7 had the advantage of short wings.

Mkikta, I too am concerned about the track of the mains, also I had the desire to incorporate at least the outer spoiler but that simply is not possible, I had already retired when the S 3 came on line but I appreciated the spoilers on the Grumman TF-1 when flying aboard carriers from Italy in the 50's

s-3 viking build
 

Nav-air,

Attached is a Rt wing down full scale S-3 landing aboard the ship. This is what I hope to avoid with my model.

MkiKta It would appear that the hook and wire are disengaged and a bolter was in order
nav-air

S-3 Viking Build
 

I have attached some of my latest photos, first showing covering of the fuse with Balsa and then covering the Balsa with Light Gray Ultracoat. I will paint the fiberglass nose and coat everything with Dullcoat

Mkikta, very nice build, covering looks great, looks as though you are including the MAD boom, is it functional ?. too bad the wing mounting bolt holes are so pronounced, I will have to study that when I progress to that point but just now it is cold in my shop. keep the photos coming
nav-air

I thought I might cover the engine mount holes with Ultracoat but I will wait and see how it flys and how everything performs first. Don't think I can cover the wing bolt holes since I will need to take the wings off to transport it. At first I thought I might make the Mad boom functional, but I felt like the weight was getting up there so I just made a non-function Mad boom tip sticking out of the hole. So far with everything I think I need to put it the aircraft, seems like it will weigh in around 9 lbs, maybe a teeny bit more.

mkikta, you have not posted in a long while, how about an update on the S3
nav-air

S-3 viking Build
 

I have attached my latest photos. I took a break for a while as I was getting frustrated with the electronics portion. I decided to build an ARF (CMP 90 mm F-9 Cougar) before trying to fly this S-3. I only had Foamy EDFs previously and decided I should master a faster/larger Balsa EDF before tackling the Viking. So I have now flown the Cougar a couple of times. I'm glad I did as its much more of a handful compared to my Foam RC Lander F-9 panther or GWS A-4 that I was flying. I also purchased the DX-18 which should help me with the landing gear door sequencing, which was one of the frustrations I was having. I'm trying to keep the weight down and this should help.

Anyway I believe the Viking airframe is just about finished except the nose gear doors. Now on to more work on sequencing, radio and CG. Mark

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Hi Mark, that looks perfect. i am very impressed of your building qualities.

Do you already know the weight? I think your additional flaps will help you to get lower takeoff and landing speed even with heigher weight, than we have on the "Standard Viking".

So take your time to build up more experience with your Cougar. That will help you with the S-3.
But with correct CG and longitudinal dihedral this S-3 ist easy to fly.

Mark, I wish you successful maiden and lots of beautiful pictures, you will show us
regards from Switzerland
kudi
www.keiro.ch
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Mark, great photos, attention to construction details is quite evident. Looks like you chose the WeMoTec evo 70 fans in which I plan on using if I can get motivated(too many irons in the fire)
Thanks for posting your progress and hope there is more to come.
Bill

Hello Kudi, what is the latest on your S3 build?, Mark has built a great looking model and the flaps will be very useful.

Bill

Any updates on this?
Mark -- I'd love to see internals of your layout and equipment. Also what motors did you use and has it flown?

Skyhawknut; No further advances on the S3, got lazy and the cols weather has driven me from the shop
Bill

Cool.

What about from you Mkikta?

Attached here are two pictures of my completed model in the shop. You can see my makeshift CG stand used while working the CG.

Here I have attached some photos of my inside layout which is pretty crowded. First you can see a view from the removed cockpit looking aft. I built a battery box for the two batteries and mounted the two ESCs on either side of that box. I built it a bit beefy because the two batteries are pretty heavy. Next you can see what I have done between the wing attaching bolt area and the aft part of the wing attachment opening. I added a piece between the former to hold the two small air cylinders which operate the Landing Gear down-locks. You can also see where I mounted the 8 channel expander for my 9 channel spectrum receiver. I mounted the air tank aft of that area inside the fuselage just above the retracts. I mounted the Ldg gear down-lock servo and valve on the left side of the fuselage between the outside wall and battery box and I mounted the retract servo and valve on the RT side of the fuselage.

I have attached four pictures of my S-3 at our flying field when I did my high speed taxi testing. A couple of shots on one of our Gieser Benches and a couple on the runway. I had a setting wrong on the camera so they came out a bit dark. I'll take some better ones soon now that the weather is getting better.

Thanks for the update Mark. A few questions...
1) What does it weigh? Seems like it would be kinda heavy.
2) how did you make the gear doors work. Would like to see that close up.
3) What motor and batt setup are you using?

Mark, great looking model, thanks for the photos. BRAVO ZULU
Nav-Air