Calrl Goldberg Tiger 60 Build
01-16-2018, 06:04 AM
#176
I remember the SIG LT40 came with the webbing precut to fit between the spars, it really gave a lot of strength. I have seen a lot f planes with the webbing glued to the sides of the spars and not one failed. If CG designed it that way I would think it would be fine. Carl knew what he was doing.
01-16-2018, 06:51 AM
#177
Thread Starter
Mike I agree 100%. I have built a number of planes and they all had this type of webbing. I made sure that I have good glue contact between the upper and lower spars, in addition, I discarded the supplied shear webbing and replaced them with balsa that extended the entire width between rib bays for greater strength.
01-17-2018, 03:55 PM
#179
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Looking great Vincent, I wish I built as cleanly as you did =P
I finally got a response from GP about the bad parts in kit " 2 weeks later ", at this point ive already cut and notched new trailing and leading edges, cut new ribs and ripped new Spars so its irrelevant. But I did have a question perhaps you or someone else would know.
Im wanting to convert to a tail dragger, however i dont want to move the main gear location in front of wing mount onto fuselage. I want to have the struts still located in the wing. What would be recommended to accomplish this. Ive found little information other than moving it in front of spar.
What type of reinforcement would be ideal and how do i know what angle the gear needs to sit in order to not have terrible nose overs on landing.
Thanks !
I finally got a response from GP about the bad parts in kit " 2 weeks later ", at this point ive already cut and notched new trailing and leading edges, cut new ribs and ripped new Spars so its irrelevant. But I did have a question perhaps you or someone else would know.
Im wanting to convert to a tail dragger, however i dont want to move the main gear location in front of wing mount onto fuselage. I want to have the struts still located in the wing. What would be recommended to accomplish this. Ive found little information other than moving it in front of spar.
What type of reinforcement would be ideal and how do i know what angle the gear needs to sit in order to not have terrible nose overs on landing.
Thanks !
01-18-2018, 01:43 AM
#180
Thread Starter
So what was Tower's response? Will they be sending you replacement pieces?
Question Trax540, why wouldn't you want to move the landing gear on the fuselage just in front of the wing? I can think of many reasons of why it would be better, first thing that comes to mind is transportation of the plane. With the landing gear mounted on the fuse it will be so much easier to put in your truck without having some type of cradle to hold the fuselage. Second, by moving the gear in front of the wing, you will eliminate the nose overs you mentioned. Third, a one piece wing is already clumsy because of its length, by adding the landing gear on it will makes it even more difficult to handle. My first Tiger had its gear on the wing, and these were the things that had irritated me.
If your heart is set on still mounting them on your wing, you will certainly have to bend the gear so that the wheels are angled toward the front of the LE to stop nose overs. I have seen many Tigers built this way. Add some extra bracing/hardwood to reinforce and and tie them into the strongest part of the wing, the spars. (You may also want to consider using shear webbing on both sides of the spar to make a very strong box type beam in those areas) Be sure to use epoxy on all of the bracing for the gear.
Good luck Trax, and post some photos!
Question Trax540, why wouldn't you want to move the landing gear on the fuselage just in front of the wing? I can think of many reasons of why it would be better, first thing that comes to mind is transportation of the plane. With the landing gear mounted on the fuse it will be so much easier to put in your truck without having some type of cradle to hold the fuselage. Second, by moving the gear in front of the wing, you will eliminate the nose overs you mentioned. Third, a one piece wing is already clumsy because of its length, by adding the landing gear on it will makes it even more difficult to handle. My first Tiger had its gear on the wing, and these were the things that had irritated me.
If your heart is set on still mounting them on your wing, you will certainly have to bend the gear so that the wheels are angled toward the front of the LE to stop nose overs. I have seen many Tigers built this way. Add some extra bracing/hardwood to reinforce and and tie them into the strongest part of the wing, the spars. (You may also want to consider using shear webbing on both sides of the spar to make a very strong box type beam in those areas) Be sure to use epoxy on all of the bracing for the gear.
Good luck Trax, and post some photos!
Last edited by VincentJ; 01-18-2018 at 08:34 AM.
01-18-2018, 03:16 AM
#181
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Vincent,
The main reason I wanted to leave gear in wing is that I was going to attempt to make strut fairings with a wheel pant " similar to what you'd see on the R2"
your points on transport are valid it may be a huge pain lugging it around.
there response was supply them part numbers for replacement. I figure at this point no sense wasting their time or resources since I've already made the parts myself. I got impatient putting the build on hold waiting for a response
The main reason I wanted to leave gear in wing is that I was going to attempt to make strut fairings with a wheel pant " similar to what you'd see on the R2"
your points on transport are valid it may be a huge pain lugging it around.
there response was supply them part numbers for replacement. I figure at this point no sense wasting their time or resources since I've already made the parts myself. I got impatient putting the build on hold waiting for a response
01-20-2018, 02:34 PM
#184
Thread Starter
Thanks RDJeff! I'm hoping that the improvements that I made to this Tiger will make it fly even better....
Last edited by VincentJ; 01-22-2018 at 03:25 AM.
01-21-2018, 04:05 AM
#185
Thread Starter
One down, one to go... I decided to epoxy the tips on instead of using my usual glue (Titebond II), it gave a lot of strength to the wing.
Last edited by VincentJ; 01-21-2018 at 06:02 AM.
01-22-2018, 06:37 AM
#187
Thread Starter
Thanks Mike. Fitting the ailerons on both wings tonight. I think that I'm going to lay some glass on the ailerons to stiffen them up so they don't twist and warp over time.
01-22-2018, 07:43 AM
#189
01-22-2018, 03:29 PM
#191
01-22-2018, 03:46 PM
#192
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Looking good Vince!
I haven't had much time to spend in the shop lately, Managed to get most of the left wing done. I decided to change the way the wing is sheathed, though i didn't sheet the entire thing as you did.
I did however get a response from GP about the issues ive been having with the wood.
Seeing as how I've already replaced what I needed to thus far. They've issued me a 50$ Tower credit to use.
Im sure I can find something useful for that
I haven't had much time to spend in the shop lately, Managed to get most of the left wing done. I decided to change the way the wing is sheathed, though i didn't sheet the entire thing as you did.
I did however get a response from GP about the issues ive been having with the wood.
Seeing as how I've already replaced what I needed to thus far. They've issued me a 50$ Tower credit to use.
Im sure I can find something useful for that
01-23-2018, 04:23 AM
#193
Thread Starter
Thanks for the information on the prop Leroy, I'm going to order a couple of 16x8 Falcon carbon fiber props.
Your wing looks great Trax. I hope that you have all the wood issues behind you now so you can put your attention to building instead of back peddling. It was nice to hear that T.H. gave you a $50.00 credit, that's just good smart customer service.
In my small workshop I got to the task of fitting and hinging the right wing panel. In an attempt to keep the aileron from twisting over time as most do, I epoxied 1/8" birch ply on each of the ends of the aileron, this can be seen in photo #2. I was going to fiberglass each aileron, but instead I just may apply Finishing Resin over each aileron to stiffen them up a bit more. Once the ailerons were cut to length and their plywood ends attached, it was time to install the hinges. I used five 1/8" Robart Hinge Points https://robart.com/collections/contr...hinge-points-6. Installing these hinges are a snap if you have the Hinge Point Drill Jig by Robart https://robart.com/collections/contr...oint-drill-jig. Chucking a 1/8" drill bit in a small cordless drill, the holes were drilled straight and accurately in no time.
I used a small piece of 220 sand paper attached to a 17/64" twist bit and hand sanded clearance for the knuckle part of the hinge point as seen in Photos 1 and 2.
Here is a good link that explains the process of using the hinge point jig and the proper way to install these type of hinges.
http://cdn.shopify.com/s/files/1/033...c8b7d.pdf?3668
Your wing looks great Trax. I hope that you have all the wood issues behind you now so you can put your attention to building instead of back peddling. It was nice to hear that T.H. gave you a $50.00 credit, that's just good smart customer service.
In my small workshop I got to the task of fitting and hinging the right wing panel. In an attempt to keep the aileron from twisting over time as most do, I epoxied 1/8" birch ply on each of the ends of the aileron, this can be seen in photo #2. I was going to fiberglass each aileron, but instead I just may apply Finishing Resin over each aileron to stiffen them up a bit more. Once the ailerons were cut to length and their plywood ends attached, it was time to install the hinges. I used five 1/8" Robart Hinge Points https://robart.com/collections/contr...hinge-points-6. Installing these hinges are a snap if you have the Hinge Point Drill Jig by Robart https://robart.com/collections/contr...oint-drill-jig. Chucking a 1/8" drill bit in a small cordless drill, the holes were drilled straight and accurately in no time.
I used a small piece of 220 sand paper attached to a 17/64" twist bit and hand sanded clearance for the knuckle part of the hinge point as seen in Photos 1 and 2.
Here is a good link that explains the process of using the hinge point jig and the proper way to install these type of hinges.
http://cdn.shopify.com/s/files/1/033...c8b7d.pdf?3668
Last edited by VincentJ; 01-23-2018 at 06:22 AM.
01-25-2018, 04:00 AM
#194
Thread Starter
Last night I fit and hinged the left aileron to the wing. All went well and I am happy with the results. Having had two previous Tigers before, the ailerons had the same symptomatic problem with warping over time. The aileron balsa stock supplied in the kit is very light and soft, so to prevent the same problem from reoccurring, I decided to take measures that would prevent the warping and twisting.
As you may remember from the previous post, I epoxied 1/8" birch ply to each end of the aileron. I was also contemplating fiberglassing the entire aileron, but decided to just apply Finishing Resin which I cut with Denatured Alcohol. Cutting the resin really allowed it to penetrate deep into the balsa which I had hoped. After the resin had cured, the aileron is now straight, stiff and very hard, I believe this will solve the issues of the past.
Time to build the tail section!
As you may remember from the previous post, I epoxied 1/8" birch ply to each end of the aileron. I was also contemplating fiberglassing the entire aileron, but decided to just apply Finishing Resin which I cut with Denatured Alcohol. Cutting the resin really allowed it to penetrate deep into the balsa which I had hoped. After the resin had cured, the aileron is now straight, stiff and very hard, I believe this will solve the issues of the past.
Time to build the tail section!
Last edited by VincentJ; 01-25-2018 at 04:02 AM.
01-30-2018, 04:49 PM
#196
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Gentlemen, I am getting back into this hobby after 20 years and have been enjoying this conversation, as I am planning to build a tiger 60 myself. But no posts for four days! I really want to see Vince’s finished plane!
01-31-2018, 01:57 AM
#197
Thread Starter
Welcome to this thread Roger and welcome back to the hobby. Sorry for the absence, but life and its surprises has a way of getting in the way with my build! 
I'll be back in my workshop this evening starting on the tail of my Tiger. Building and flying a Tiger is a great way to get back into things for you. After a 20 year hiatus, I'm sure that you will find that many things have changed...
Have you purchased your Tiger yet? What are your plans, gas, nitro?
I'll be back in my workshop this evening starting on the tail of my Tiger. Building and flying a Tiger is a great way to get back into things for you. After a 20 year hiatus, I'm sure that you will find that many things have changed...Have you purchased your Tiger yet? What are your plans, gas, nitro?
Last edited by VincentJ; 01-31-2018 at 06:06 AM.
01-31-2018, 06:26 AM
#199
Thread Starter
I have an Ultra Sport 1000 that's waiting to be built. That may be next Mike...