My Wood & Foam Bridi UFO Build
#452
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RE: My Wood & Foam Bridi UFO Build
It’s too late for that mount but you can pick up the 1/8†by cutting the face of the mount for the engine back plate bolts. Then the engine can move back further. You will also need to cut out some space for the fuel lines on the mount behind the engine. Here are some pics http://www.rcuniverse.com/forum/fb.asp?m=2456231 and here http://www.rcuniverse.com/forum/fb.asp?m=10237106
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RE: My Wood & Foam Bridi UFO Build
The only thing I can think of that would require adjustment is that the bottom nose block would taper more gradually into the spinner ring and the curve to the fuse side top front would be a little shallower to accommodate the 1/8" extra length.
Wish I was building my little one rather than being at work... []
David.
Wish I was building my little one rather than being at work... []
David.
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RE: My Wood & Foam Bridi UFO Build
Thanks for all the suggestions guys!
After thinking about it for a while and doing some rough moment calculations I decided to not worry about the extra 1/8". The engine being 1/8" further forward is roughly equivalent to adding .15 of an ounce of nose weight. Not enough to warrant backing up and redoing the mount.
I can balance it out by lengthening the tail by 3/4". Based on the current weight of the stab/elevator and fin/rudder, moving them back 3/4" would be roughly the same as adding .16 of an ounce of tail weight. Since, at this point, it would be very easy to make the fuse sides 3/4" longer I might just go ahead and do that. I don't think the extra length would adversely affect the fight characteristics of the UFO. [8D]
After thinking about it for a while and doing some rough moment calculations I decided to not worry about the extra 1/8". The engine being 1/8" further forward is roughly equivalent to adding .15 of an ounce of nose weight. Not enough to warrant backing up and redoing the mount.
I can balance it out by lengthening the tail by 3/4". Based on the current weight of the stab/elevator and fin/rudder, moving them back 3/4" would be roughly the same as adding .16 of an ounce of tail weight. Since, at this point, it would be very easy to make the fuse sides 3/4" longer I might just go ahead and do that. I don't think the extra length would adversely affect the fight characteristics of the UFO. [8D]
#457
RE: My Wood & Foam Bridi UFO Build
Have you accounted for radio install, rud an elev pushrods, tank position (closer to cg would be better), landing gear (in retracted position), covering/paint, weight of pipe aft of cg etc. There are way too many things to consider. Deviating from the plan may end up backfiring on ya. Were only talking 4.5 grams on a short arm. I'd add that just gluing the the tail together. LOL. For the nose, a thin spinner ring shim won't change the curve enough to matter. I imagine your going to sand the final contour to spinner anyway.
#458
RE: My Wood & Foam Bridi UFO Build
I agree to add the 1/8" shim just to fillup thespace. Don't change the moment length of the tail section. You're all over thinkingthis. Build as is, it probably won't matter. Didn't you see the tolerance on the plans ±1/8".
ORIGINAL: 790
Have you accounted for radio install, rud an elev pushrods, tank position (closer to cg would be better), landing gear (in retracted position), covering/paint, weight of pipe aft of cg etc. There are way too many things to consider. Deviating from the plan may end up backfiring on ya. Were only talking 4.5 grams on a short arm. I'd add that just gluing the the tail together. LOL. For the nose, a thin spinner ring shim won't change the curve enough to matter. I imagine your going to sand the final contour to spinner anyway.
Have you accounted for radio install, rud an elev pushrods, tank position (closer to cg would be better), landing gear (in retracted position), covering/paint, weight of pipe aft of cg etc. There are way too many things to consider. Deviating from the plan may end up backfiring on ya. Were only talking 4.5 grams on a short arm. I'd add that just gluing the the tail together. LOL. For the nose, a thin spinner ring shim won't change the curve enough to matter. I imagine your going to sand the final contour to spinner anyway.
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RE: My Wood & Foam Bridi UFO Build
I've decided to not worry about the extra 1/8" and just make the nose that much longer to compensate.
The nose gear mount has been epoxied to the firewall. Once it's installed in the fuselage I'll add some light ply gussets to strengthen the assembly. [8D]
The nose gear mount has been epoxied to the firewall. Once it's installed in the fuselage I'll add some light ply gussets to strengthen the assembly. [8D]
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RE: My Wood & Foam Bridi UFO Build
The pieces for the fuselage sides were cut from 3/16" balsa and glued together using Titebond. Instead of using the 1/16" ply joiner plates called for on the plans I used 1/32" ply. The 1/16" seemed like over kill to me.
Since I won't be using the beam type mounts shown on the plans I added 1/64" ply doublers to the fuselage sides to restore some of the rigidity that will be lost by not having the long beams. The doublers and joiner plates were attached with epoxy.
The stab and wing cut outs were made using [link=http://www.seetemp.com/]See Temp[/link] template material. This is great stuff to work with! [8D]
Since I won't be using the beam type mounts shown on the plans I added 1/64" ply doublers to the fuselage sides to restore some of the rigidity that will be lost by not having the long beams. The doublers and joiner plates were attached with epoxy.
The stab and wing cut outs were made using [link=http://www.seetemp.com/]See Temp[/link] template material. This is great stuff to work with! [8D]
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RE: My Wood & Foam Bridi UFO Build
Ralph,
nice setup on the fuse. I see that you've decided to follow the plans and build it classic Joe style - kudos to you. I never quite understood the concept of "edge" tristock in Joe's plans rather than "corner" stock. It just seemed so much easier to build to me with full box construction using tristock in the corner rather than producing the corner itself with the tristock. But I know I will learn how to do it "Joe style" in the best way possible by following your progress.
In other news, another UFO 25 kit went out today. Dave (yet another) quite liked the design and I sent him my spare kit. He's quite interested in the various builds so I pointed him to your thread and to David Wood's. He's of course eager to see your U25 build as well but all things in good time. His RCU handle is Chemac.
I got glue on my fingers tonight! A pair of Mystic wings is in the works...
David.
nice setup on the fuse. I see that you've decided to follow the plans and build it classic Joe style - kudos to you. I never quite understood the concept of "edge" tristock in Joe's plans rather than "corner" stock. It just seemed so much easier to build to me with full box construction using tristock in the corner rather than producing the corner itself with the tristock. But I know I will learn how to do it "Joe style" in the best way possible by following your progress.
In other news, another UFO 25 kit went out today. Dave (yet another) quite liked the design and I sent him my spare kit. He's quite interested in the various builds so I pointed him to your thread and to David Wood's. He's of course eager to see your U25 build as well but all things in good time. His RCU handle is Chemac.
I got glue on my fingers tonight! A pair of Mystic wings is in the works...
David.
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RE: My Wood & Foam Bridi UFO Build
I've been working on fixing up a space in my basement so I can setup another model building area. That project has slowed down the progress on the UFO fuselage. But I still manage to glue a piece or two to the fuselage every now and then. At least it's still moving forward although not very quickly. It won't be too much longer and the basement project will be done and then it will be full speed ahead on both this UFO and the UFO .25 that I got from David! Looking forward to starting work on the .25!
My order of assembly on the UFO fuselage differs quite a bit from the original construction article, but in the end it should end up with the same number of parts and pieces! Hopefully, barring any "Brain Farts", the parts will end up in the correct places.
RG [8D]
My order of assembly on the UFO fuselage differs quite a bit from the original construction article, but in the end it should end up with the same number of parts and pieces! Hopefully, barring any "Brain Farts", the parts will end up in the correct places.
RG [8D]
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RE: My Wood & Foam Bridi UFO Build
Brian,
epoxy can be a little messy if you're not careful but it also leaves a glossy dark sheen on wood where it is not "working". White wood glue dries the cleanest but is obviously not the strongest for critical areas. I've been using more and more wood glue vs CA and it leaves clean, non-hardened joints. I guess I'm going back to the old ways for health & longevity. Wood glue also penetrates better than medium and thick CA (the thin stuff will go everywhere if not careful).
Then again, Ralph is an immaculate builder. [X(]
Can't wait to see your new work area Ralph, and... it's intended first project! I might just finish up my current build as you do yours so we might be set to work in tandem on the U25. I do have to do some painting though...
David.
epoxy can be a little messy if you're not careful but it also leaves a glossy dark sheen on wood where it is not "working". White wood glue dries the cleanest but is obviously not the strongest for critical areas. I've been using more and more wood glue vs CA and it leaves clean, non-hardened joints. I guess I'm going back to the old ways for health & longevity. Wood glue also penetrates better than medium and thick CA (the thin stuff will go everywhere if not careful).
Then again, Ralph is an immaculate builder. [X(]
Can't wait to see your new work area Ralph, and... it's intended first project! I might just finish up my current build as you do yours so we might be set to work in tandem on the U25. I do have to do some painting though...
David.
#466
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RE: My Wood & Foam Bridi UFO Build
ORIGINAL: doxilia
Brian,
epoxy can be a little messy if you're not careful but it also leaves a glossy dark sheen on wood where it is not ''working''. White wood glue dries the cleanest but is obviously not the strongest for critical areas. I've been using more and more wood glue vs CA and it leaves clean, non-hardened joints. I guess I'm going back to the old ways for health & longevity. Wood glue also penetrates better than medium and thick CA (the thin stuff will go everywhere if not careful).
Then again, Ralph is an immaculate builder. [X(]
Can't wait to see your new work area Ralph, and... it's intended first project! I might just finish up my current build as you do yours so we might be set to work in tandem on the U25. I do have to do some painting though...
David.
Brian,
epoxy can be a little messy if you're not careful but it also leaves a glossy dark sheen on wood where it is not ''working''. White wood glue dries the cleanest but is obviously not the strongest for critical areas. I've been using more and more wood glue vs CA and it leaves clean, non-hardened joints. I guess I'm going back to the old ways for health & longevity. Wood glue also penetrates better than medium and thick CA (the thin stuff will go everywhere if not careful).
Then again, Ralph is an immaculate builder. [X(]
Can't wait to see your new work area Ralph, and... it's intended first project! I might just finish up my current build as you do yours so we might be set to work in tandem on the U25. I do have to do some painting though...
David.
I've almost quit using CA altogether. I'll use it a little though.
Brian
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RE: My Wood & Foam Bridi UFO Build
Naah,
should be me apologizing Brian - for barging in with a comment. Your question was directed at Ralph. I should have let him reply first.
David.
should be me apologizing Brian - for barging in with a comment. Your question was directed at Ralph. I should have let him reply first.
David.
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RE: My Wood & Foam Bridi UFO Build
No need for anyone to apologize guys! It's all good!
Thanks Brian!
I use the finishing resin mainly for laminating. I used it to apply the 1/64" ply doublers to the fuse sides. I also mix it with micro balloons to make small fillets. The finishing resin sands better than regular epoxy for making fillets.
I used 30 minute Devcon Epoxy to glue the formers to the fuse sides and any plywood to plywood joints. For any joint that includes balsa I use Titebond. I stopped using CA several years ago due to severe sinus issues.
RG
David,
I finished up the basement work area the other day! Boy what a miserable project that was! [:@] But the real fun starts this weekend when I start building some work benches. Looking forward to getting that done so I can start on the baby UFO. I'm getting a little antsy!
RG
ORIGINAL: Ilikebipes
Ralph,
When you use epoxy, do you use the finishing resin for everything?
Everything is sooo emaculate in your build. Hopefully with time and better tools, my builds will look as nice.
Brian
Ralph,
When you use epoxy, do you use the finishing resin for everything?
Everything is sooo emaculate in your build. Hopefully with time and better tools, my builds will look as nice.
Brian
I use the finishing resin mainly for laminating. I used it to apply the 1/64" ply doublers to the fuse sides. I also mix it with micro balloons to make small fillets. The finishing resin sands better than regular epoxy for making fillets.
I used 30 minute Devcon Epoxy to glue the formers to the fuse sides and any plywood to plywood joints. For any joint that includes balsa I use Titebond. I stopped using CA several years ago due to severe sinus issues.
RG
ORIGINAL: doxilia
Can't wait to see your new work area Ralph, and... it's intended first project! I might just finish up my current build as you do yours so we might be set to work in tandem on the U25. I do have to do some painting though...
David.
Can't wait to see your new work area Ralph, and... it's intended first project! I might just finish up my current build as you do yours so we might be set to work in tandem on the U25. I do have to do some painting though...
David.
I finished up the basement work area the other day! Boy what a miserable project that was! [:@] But the real fun starts this weekend when I start building some work benches. Looking forward to getting that done so I can start on the baby UFO. I'm getting a little antsy!
RG
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RE: My Wood & Foam Bridi UFO Build
ORIGINAL: R_G
David,
I finished up the basement work area the other day! Boy what a miserable project that was! [:@] But the real fun starts this weekend when I start building some work benches. Looking forward to getting that done so I can start on the baby UFO. I'm getting a little antsy!
RG
David,
I finished up the basement work area the other day! Boy what a miserable project that was! [:@] But the real fun starts this weekend when I start building some work benches. Looking forward to getting that done so I can start on the baby UFO. I'm getting a little antsy!
RG
I'm getting antsy miself. I'm looking forward to seeing that swept back wing. I built an F15 once but even that didn't have a swept back wing so first "model sweep"
David.
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RE: My Wood & Foam Bridi UFO Build
Just went for a tad under 500 coins... [:-]
What does this mean? Conservation projects rock! As does scratch building...
Ralph, you must keep working. [sm=thumbs_up.gif]
David.
What does this mean? Conservation projects rock! As does scratch building...
Ralph, you must keep working. [sm=thumbs_up.gif]
David.
#472
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RE: My Wood & Foam Bridi UFO Build
Mr. Bridi should be as proud as punch!!! He has definitely left an enduring legacy. I just wish I could have seen him fly.
Mr. Bridi,
Thank you for your life's work. You have brought great joy to me, my family and countless others. I tip my hat to you sir.
Brian Lundberg
Mr. Bridi,
Thank you for your life's work. You have brought great joy to me, my family and countless others. I tip my hat to you sir.
Brian Lundberg
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RE: My Wood & Foam Bridi UFO Build
Before the crisis I cringed [:@] when I shelled out a similar figure for two MK kits. Then again, they were MK's.
Of course, in retrospect, I am now glad that I did and the expense is now in the past.
Someone mentioned that it was just coin and that I would make more - with a little effort...
David.
Of course, in retrospect, I am now glad that I did and the expense is now in the past.
Someone mentioned that it was just coin and that I would make more - with a little effort...
David.
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RE: My Wood & Foam Bridi UFO Build
ORIGINAL: rv7driver
Ralph, looking good, I just ordered some of the templete material that you showed looks like it makes building easy. Pete
Ralph, looking good, I just ordered some of the templete material that you showed looks like it makes building easy. Pete
That [link=http://www.seetemp.com/]See Temp[/link] stuff is great to work with. I used to use poster board to make templates, but See Temp is so much easier to use. Just lay it over your plans, score it with a #11 and snap it apart!
RG