Redrilling Firewall mount holes????????????
12-10-2007 | 08:30 PM
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From: Nutley,
NJ
Redrilling Firewall mount holes????????????
HELP HELP HELP! I had to replace a bad blind nut as I couldnt get the screw in. Being that I had to shave my engine mount down in order to fit a saito 91(Showtime 50 calls for up to an .82), I figured it would be a good time to mount it properly. I was never crazy about the idea to begin with. Could someone please walk me through the procedure of filling the holes and redrilling new ones. What do you use to fill? Any tips? How do I secure the blind nuts when I can barely even get my hand behind the firewall? Help would be appreciated.
12-10-2007 | 08:40 PM
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RE: Redrilling Firewall mount holes????????????
To fill the old holes in the firewall find wooden dowel that will fit into the hole. A snug fit is best. Use a little bit of epoxy in the hole and then put the dowel into the hole. Then use a razor saw to cut the dowel off flush with the firewall.
For setting a blind nut. There are several really good "tricks" that can be used. Here's what I do. Get a wire pushrod and slide it into the fuselage through the hole you want the blind nut in. When it's in the fuselage slide your blind nut onto the pushrod and then use an easy connector behind the blind nut. Now pull the blind nut back through the fuselage to the backside of the firewall. Once it's up to the wood pull it into the wood enough to set the teeth into the wood. Remove the pushrod and then thread a bolt through the firewall into the blind nut and tighten it to completely set the blind nut into the wood.
Ken
For setting a blind nut. There are several really good "tricks" that can be used. Here's what I do. Get a wire pushrod and slide it into the fuselage through the hole you want the blind nut in. When it's in the fuselage slide your blind nut onto the pushrod and then use an easy connector behind the blind nut. Now pull the blind nut back through the fuselage to the backside of the firewall. Once it's up to the wood pull it into the wood enough to set the teeth into the wood. Remove the pushrod and then thread a bolt through the firewall into the blind nut and tighten it to completely set the blind nut into the wood.
Ken
12-10-2007 | 09:05 PM
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From: Nutley,
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RE: Redrilling Firewall mount holes????????????
Believe it or not RCKEN....I knew you would reply.....with an EXCELLENT response of course. Many Thanks! The pics are a bonus.
Quick question: Would it be good enough to relocate only one side of the mount? What would be the best way to line up the mount if I moved both sides? Is an approximation good enough?
Also...Can I reuse the original nuts or a new ones best?
Quick question: Would it be good enough to relocate only one side of the mount? What would be the best way to line up the mount if I moved both sides? Is an approximation good enough?
Also...Can I reuse the original nuts or a new ones best?
12-10-2007 | 09:09 PM
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From: Port Orchard WA
RE: Redrilling Firewall mount holes????????????
Ken, You should really do a build thread, if you haven't already. With your knowledge and knack for presenting the information in a very understandable manner you could help thousands of guys without even knowing.
12-10-2007 | 09:15 PM
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RE: Redrilling Firewall mount holes????????????
Al,
Thanks for those kind words. I have already done one build thread on the LT-40. [link][link=http://www.rcuniverse.com/forum/m_3439708/tm.htm]Pay It Forward build thread!! LT-40 build.[/link]
It's funny that you mention doing a build thread. I have been considering doing another build thread in the same manner as the LT-40 thread that I did. I was thinking of doing a "second plane" build thread. I was going to see what the forum here thought of the idea and let them choose the plane that I build. I still have a plate full of projects that I have to clear off first, so I wasn't going to say anything just yet. But since you mention it I will put out that I am thinking about doing it.
Ken
Thanks for those kind words. I have already done one build thread on the LT-40. [link][link=http://www.rcuniverse.com/forum/m_3439708/tm.htm]Pay It Forward build thread!! LT-40 build.[/link]
It's funny that you mention doing a build thread. I have been considering doing another build thread in the same manner as the LT-40 thread that I did. I was thinking of doing a "second plane" build thread. I was going to see what the forum here thought of the idea and let them choose the plane that I build. I still have a plate full of projects that I have to clear off first, so I wasn't going to say anything just yet. But since you mention it I will put out that I am thinking about doing it.
Ken
12-10-2007 | 09:24 PM
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RE: Redrilling Firewall mount holes????????????
I had actually mentioned to Bill James that I was tossing around the idea of doing a series of videos building a basic plane any newbie might buy if I could talk my neighbor into doing it with me. He's been building kits for 20+ years. I figured we could shoot 10-15 minute videos on each segment of building a plane from it's arrival and inspection to its maiden flight. You know, something like the WM .46 CAP. Just an ARF. Explain the ins and outs and hows and whys. You can upload videos up to 200megs on Putfile for free and there is no limit on the number so it could prove to be an interesting venue for helping folks out. You might want to think about doing that yourself. You certainly have the knowledge and skills needed and I'm sure after the first few you'd get over the camera-shy part! LOL Think about it buddy, it could start a whole new era in teaching on here. Your own mini-series. I really do think it would be an outstanding project.
Al
Al
12-10-2007 | 09:36 PM
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From: OZark,
MO
RE: Redrilling Firewall mount holes????????????
RO,
Mount your motor mount to the engine and center it on the firewall ( or desiredd position) then mark your holes. You may need to mark the mount's top and bottom position and remove the motor to get to the holes.
Here is a home made hole center marking tool. the conical tip is from a ball point pen, the barrel is a peice of brass tubeing, the inner piece is a sharpened length of music wire, springs from dead pens with a servo grommet for the spring keeper and a trusty wheel collar to top it off works great.
Sorry about the pic size[
]
Mount your motor mount to the engine and center it on the firewall ( or desiredd position) then mark your holes. You may need to mark the mount's top and bottom position and remove the motor to get to the holes.
Here is a home made hole center marking tool. the conical tip is from a ball point pen, the barrel is a peice of brass tubeing, the inner piece is a sharpened length of music wire, springs from dead pens with a servo grommet for the spring keeper and a trusty wheel collar to top it off works great.
Sorry about the pic size[
]
12-10-2007 | 09:55 PM
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RE: Redrilling Firewall mount holes????????????
ORIGINAL: Al Lewis
I had actually mentioned to Bill James that I was tossing around the idea of doing a series of videos building a basic plane any newbie might buy if I could talk my neighbor into doing it with me. He's been building kits for 20+ years. I figured we could shoot 10-15 minute videos on each segment of building a plane from it's arrival and inspection to its maiden flight. You know, something like the WM .46 CAP. Just an ARF. Explain the ins and outs and hows and whys. You can upload videos up to 200megs on Putfile for free and there is no limit on the number so it could prove to be an interesting venue for helping folks out. You might want to think about doing that yourself. You certainly have the knowledge and skills needed and I'm sure after the first few you'd get over the camera-shy part! LOL Think about it buddy, it could start a whole new era in teaching on here. Your own mini-series. I really do think it would be an outstanding project.
Al
I had actually mentioned to Bill James that I was tossing around the idea of doing a series of videos building a basic plane any newbie might buy if I could talk my neighbor into doing it with me. He's been building kits for 20+ years. I figured we could shoot 10-15 minute videos on each segment of building a plane from it's arrival and inspection to its maiden flight. You know, something like the WM .46 CAP. Just an ARF. Explain the ins and outs and hows and whys. You can upload videos up to 200megs on Putfile for free and there is no limit on the number so it could prove to be an interesting venue for helping folks out. You might want to think about doing that yourself. You certainly have the knowledge and skills needed and I'm sure after the first few you'd get over the camera-shy part! LOL Think about it buddy, it could start a whole new era in teaching on here. Your own mini-series. I really do think it would be an outstanding project.
Al
Actually, Minnflyer and myself already have this very same project in the works right now. We have done up a series of building videos that we are going to make available on the web. They are videos of getting a plane together, start to maiden flight. I'm in the process of finishing up the website now. We're hoping to have it launched either late this month, or early next month. We have plans to follow on with a complete set of how-to's, tutorials, and other help for beginners down the road. The entire site is going to be devoted to helping beginners getting started in the hobby.
Ken
12-10-2007 | 09:56 PM
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From: Port Orchard WA
RE: Redrilling Firewall mount holes????????????
Nice looking tool there OzMo. Had to look around a bit with that photo size. LOL I can never get them to come in that big.[&o][&o][&o][&o] Looks like a simple and easy way to mark a lot of different holes on the plane. Thanks!!!
Ken, That's great news. I got the idea after watching the videos on Bill's 3D flying thread. I think they purvey a great deal more information then a narrative. I figured to just open a thread on here and link the videos in one post after another after they were all done. Don't know if I'll get the time ,or the neighbor, to do mine but I'll sure look forward to yours!!!
Ken, That's great news. I got the idea after watching the videos on Bill's 3D flying thread. I think they purvey a great deal more information then a narrative. I figured to just open a thread on here and link the videos in one post after another after they were all done. Don't know if I'll get the time ,or the neighbor, to do mine but I'll sure look forward to yours!!!
12-10-2007 | 10:11 PM
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From: Sarnia, ON, CANADA
RE: Redrilling Firewall mount holes????????????
There are a lot of great ideas here - If you have an extra 1/4" of room in the plane I have a slightly 'Different' way to mount a blind nut.
First; cut a small block of 1/4" plywood about 1/2" square.
2. Drill a hole through the wood that will accomodate the Blind Nut,
3. Mount the Blind Nut in the block of wood,
4. Put a small amount of vasoline on the screw threads,
5. Drill the holes in the firewall as required,
6. Put Epoxy on the block of wood and align it with a hole in the firewall, insert a screw and tighten it down.
7. Repeat for the other holes as required.
The advantage to this system is that you are not trying to pull the teeth of the blind nut into the firewall as you are crushing the head of the bolt into the wood.
Good Luck!
First; cut a small block of 1/4" plywood about 1/2" square.
2. Drill a hole through the wood that will accomodate the Blind Nut,
3. Mount the Blind Nut in the block of wood,
4. Put a small amount of vasoline on the screw threads,
5. Drill the holes in the firewall as required,
6. Put Epoxy on the block of wood and align it with a hole in the firewall, insert a screw and tighten it down.
7. Repeat for the other holes as required.
The advantage to this system is that you are not trying to pull the teeth of the blind nut into the firewall as you are crushing the head of the bolt into the wood.
Good Luck!
12-11-2007 | 12:20 AM
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From: Calimesa,
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RE: Redrilling Firewall mount holes????????????
ORIGINAL: RCKen
Al,
Actually, Minnflyer and myself already have this very same project in the works right now. We have done up a series of building videos that we are going to make available on the web. They are videos of getting a plane together, start to maiden flight. I'm in the process of finishing up the website now. We're hoping to have it launched either late this month, or early next month. We have plans to follow on with a complete set of how-to's, tutorials, and other help for beginners down the road. The entire site is going to be devoted to helping beginners getting started in the hobby.
Ken
ORIGINAL: Al Lewis
I had actually mentioned to Bill James that I was tossing around the idea of doing a series of videos building a basic plane any newbie might buy if I could talk my neighbor into doing it with me. He's been building kits for 20+ years. I figured we could shoot 10-15 minute videos on each segment of building a plane from it's arrival and inspection to its maiden flight. You know, something like the WM .46 CAP. Just an ARF. Explain the ins and outs and hows and whys. You can upload videos up to 200megs on Putfile for free and there is no limit on the number so it could prove to be an interesting venue for helping folks out. You might want to think about doing that yourself. You certainly have the knowledge and skills needed and I'm sure after the first few you'd get over the camera-shy part! LOL Think about it buddy, it could start a whole new era in teaching on here. Your own mini-series. I really do think it would be an outstanding project.
Al
I had actually mentioned to Bill James that I was tossing around the idea of doing a series of videos building a basic plane any newbie might buy if I could talk my neighbor into doing it with me. He's been building kits for 20+ years. I figured we could shoot 10-15 minute videos on each segment of building a plane from it's arrival and inspection to its maiden flight. You know, something like the WM .46 CAP. Just an ARF. Explain the ins and outs and hows and whys. You can upload videos up to 200megs on Putfile for free and there is no limit on the number so it could prove to be an interesting venue for helping folks out. You might want to think about doing that yourself. You certainly have the knowledge and skills needed and I'm sure after the first few you'd get over the camera-shy part! LOL Think about it buddy, it could start a whole new era in teaching on here. Your own mini-series. I really do think it would be an outstanding project.
Al
Actually, Minnflyer and myself already have this very same project in the works right now. We have done up a series of building videos that we are going to make available on the web. They are videos of getting a plane together, start to maiden flight. I'm in the process of finishing up the website now. We're hoping to have it launched either late this month, or early next month. We have plans to follow on with a complete set of how-to's, tutorials, and other help for beginners down the road. The entire site is going to be devoted to helping beginners getting started in the hobby.
Ken
Sorry to butt in here, but had a question. My son and I are going to build our first kit (Tiger 60) together right after Christmas (presuming my son is not on Santa's naughty list). I have your LT-40 build on my favorites, planning to refer to it a lot. Great thread, but has a lot of "non-building" posts from others. If you have a readers digest version of the build or videos that I can purchase, I would be very interested.
Thanks,
Pete
12-11-2007 | 12:27 AM
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RE: Redrilling Firewall mount holes????????????
ORIGINAL: mesaflyer
Ken,
Sorry to butt in here, but had a question. My son and I are going to build our first kit (Tiger 60) together right after Christmas (presuming my son is not on Santa's naughty list). I have your LT-40 build on my favorites, planning to refer to it a lot. Great thread, but has a lot of "non-building" posts from others. If you have a readers digest version of the build or videos that I can purchase, I would be very interested.
Thanks,
Pete
Ken,
Sorry to butt in here, but had a question. My son and I are going to build our first kit (Tiger 60) together right after Christmas (presuming my son is not on Santa's naughty list). I have your LT-40 build on my favorites, planning to refer to it a lot. Great thread, but has a lot of "non-building" posts from others. If you have a readers digest version of the build or videos that I can purchase, I would be very interested.
Thanks,
Pete
You're not the first to ask this question. Sorry to say that right now I don't have one made up, but because I've had several requests such as yours I'm hoping to have some time over christmas weekend to convert it to a document that you can download. Keep an eye on the build thread for a link to the document when I get it done.
Ken
12-11-2007 | 12:45 AM
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From: Calimesa,
CA
RE: Redrilling Firewall mount holes????????????
ORIGINAL: RCKen
Pete,
You're not the first to ask this question. Sorry to say that right now I don't have one made up, but because I've had several requests such as yours I'm hoping to have some time over christmas weekend to convert it to a document that you can download. Keep an eye on the build thread for a link to the document when I get it done.
Ken
ORIGINAL: mesaflyer
Ken,
Sorry to butt in here, but had a question. My son and I are going to build our first kit (Tiger 60) together right after Christmas (presuming my son is not on Santa's naughty list). I have your LT-40 build on my favorites, planning to refer to it a lot. Great thread, but has a lot of "non-building" posts from others. If you have a readers digest version of the build or videos that I can purchase, I would be very interested.
Thanks,
Pete
Ken,
Sorry to butt in here, but had a question. My son and I are going to build our first kit (Tiger 60) together right after Christmas (presuming my son is not on Santa's naughty list). I have your LT-40 build on my favorites, planning to refer to it a lot. Great thread, but has a lot of "non-building" posts from others. If you have a readers digest version of the build or videos that I can purchase, I would be very interested.
Thanks,
Pete
You're not the first to ask this question. Sorry to say that right now I don't have one made up, but because I've had several requests such as yours I'm hoping to have some time over christmas weekend to convert it to a document that you can download. Keep an eye on the build thread for a link to the document when I get it done.
Ken
Pete
12-11-2007 | 07:42 PM
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From: Nutley,
NJ
RE: Redrilling Firewall mount holes????????????
RCKEN - I have pulled my blind nuts and am test fitting the mount I am thinking of leaving one alone because it is blocked in by part of the frame behind the firewall. I cant get in there to cut away the frame, replace blindnut, and replace wood once done. If I leave like this, it will bring the centerline of the engine off by about 5mm. Will this make a difference?
12-11-2007 | 08:55 PM
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From: Nutley,
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RE: Redrilling Firewall mount holes????????????
This is on a Hanger 9 SHowtime 50. The specs call for a. .82 four stroke. I am using a Saito .91. When I originally mounted the engine, I had to shave some of the insides of the engine mount to get the engine to fit. I wasnt really crazy of the idea thinking I was weakening the mount. In order to get the engine to fit, I need to space the mount holes on the firewall further apart.
12-11-2007 | 09:55 PM
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RE: Redrilling Firewall mount holes????????????
Yeah, that may be a bit much to shave off. So let's see if we can solve the problem of the blind nut. When you try to insert the blind nut what is interferring with it?? Tri-stock on the back of the firewall??
Ken
Ken
12-11-2007 | 10:51 PM
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From: Nutley,
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RE: Redrilling Firewall mount holes????????????
Here are some pics. If you look at the first...the two dots on the top are where the new holes would be if I was to utilize the existing mount holes on the bottom. The second pic shows the cross brace which I cant get to to remove and replace once I remove the blindnut just in front of it.
