Build - New Version CARF P-51 Mustang
12-03-2012, 11:16 AM
#26
RE: Build - New Version CARF P-51 Mustang
ORIGINAL: k_sonn
The standoffs I ordered from PSP arrived so it was time to install the motor. An electric motor can be installed closer to the spinner than a gas motor so the first thing needed was a new firewall. I used a contour guage to get the correct shape of the bottom of the fuse and cut out a couple formers from 1/8th inch aircraft ply and laminated them together with epoxy. I taped a couple of standoffs together to get a length of 3.25 inches and tack glued them to the original firewall. The new firewall was pushed against the standoffs and hysoled in place. This allowed the transfer of the right thrust and down thrust from the original firewall to the new firewall. The next day the firewalls were drilled and the top two standoffs were bolted in place. These standoffs anchor the top of the new firewall and prevent it from moving. Next, the motor was installed using 2 inch standoffs. I also received some 4-40 counter sunk flat head slotted machine screws from Micro Fasteners. I'll be using these to secure the cowl.
Kirk
The standoffs I ordered from PSP arrived so it was time to install the motor. An electric motor can be installed closer to the spinner than a gas motor so the first thing needed was a new firewall. I used a contour guage to get the correct shape of the bottom of the fuse and cut out a couple formers from 1/8th inch aircraft ply and laminated them together with epoxy. I taped a couple of standoffs together to get a length of 3.25 inches and tack glued them to the original firewall. The new firewall was pushed against the standoffs and hysoled in place. This allowed the transfer of the right thrust and down thrust from the original firewall to the new firewall. The next day the firewalls were drilled and the top two standoffs were bolted in place. These standoffs anchor the top of the new firewall and prevent it from moving. Next, the motor was installed using 2 inch standoffs. I also received some 4-40 counter sunk flat head slotted machine screws from Micro Fasteners. I'll be using these to secure the cowl.
Kirk
Behzad
12-06-2012, 05:48 AM
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RE: Build - New Version CARF P-51 Mustang
Hi Kirk, nice project.
I have the CARF Spitfire and the plan is to go with the Hacker A150-8, that way I could turn the 28" diameter 3 blade prop. I know it's meant to be a 4 blade for the mark 9, but seems that as the kit is a fudged mark 5 anyways...
I will also go with the Bendini sound system. Looking to your build I am going to place my batteries where you have your speaker box. Question is, where are you going to place your batteries?
BR, Gregg
I have the CARF Spitfire and the plan is to go with the Hacker A150-8, that way I could turn the 28" diameter 3 blade prop. I know it's meant to be a 4 blade for the mark 9, but seems that as the kit is a fudged mark 5 anyways...
I will also go with the Bendini sound system. Looking to your build I am going to place my batteries where you have your speaker box. Question is, where are you going to place your batteries?
BR, Gregg
12-10-2012, 01:47 PM
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RE: Build - New Version CARF P-51 Mustang
ORIGINAL: DUCMOZ
Hi Kirk, do ou think just two posts is enough to hold the lower part of the second fire-wall? with the amount of torque that you have, I would think that you would need at least a square piece of material there to prevent the nose of the plane from twisting.
Behzad
ORIGINAL: k_sonn
The standoffs I ordered from PSP arrived so it was time to install the motor. An electric motor can be installed closer to the spinner than a gas motor so the first thing needed was a new firewall. I used a contour guage to get the correct shape of the bottom of the fuse and cut out a couple formers from 1/8th inch aircraft ply and laminated them together with epoxy. I taped a couple of standoffs together to get a length of 3.25 inches and tack glued them to the original firewall. The new firewall was pushed against the standoffs and hysoled in place. This allowed the transfer of the right thrust and down thrust from the original firewall to the new firewall. The next day the firewalls were drilled and the top two standoffs were bolted in place. These standoffs anchor the top of the new firewall and prevent it from moving. Next, the motor was installed using 2 inch standoffs. I also received some 4-40 counter sunk flat head slotted machine screws from Micro Fasteners. I'll be using these to secure the cowl.
Kirk
The standoffs I ordered from PSP arrived so it was time to install the motor. An electric motor can be installed closer to the spinner than a gas motor so the first thing needed was a new firewall. I used a contour guage to get the correct shape of the bottom of the fuse and cut out a couple formers from 1/8th inch aircraft ply and laminated them together with epoxy. I taped a couple of standoffs together to get a length of 3.25 inches and tack glued them to the original firewall. The new firewall was pushed against the standoffs and hysoled in place. This allowed the transfer of the right thrust and down thrust from the original firewall to the new firewall. The next day the firewalls were drilled and the top two standoffs were bolted in place. These standoffs anchor the top of the new firewall and prevent it from moving. Next, the motor was installed using 2 inch standoffs. I also received some 4-40 counter sunk flat head slotted machine screws from Micro Fasteners. I'll be using these to secure the cowl.
Kirk
Behzad
Kirk
12-10-2012, 02:01 PM
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RE: Build - New Version CARF P-51 Mustang
ORIGINAL: mungrelv8ute
Hi Kirk, nice project.
I have the CARF Spitfire and the plan is to go with the Hacker A150-8, that way I could turn the 28" diameter 3 blade prop. I know it's meant to be a 4 blade for the mark 9, but seems that as the kit is a fudged mark 5 anyways...
I will also go with the Bendini sound system. Looking to your build I am going to place my batteries where you have your speaker box. Question is, where are you going to place your batteries?
BR, Gregg
Hi Kirk, nice project.
I have the CARF Spitfire and the plan is to go with the Hacker A150-8, that way I could turn the 28" diameter 3 blade prop. I know it's meant to be a 4 blade for the mark 9, but seems that as the kit is a fudged mark 5 anyways...
I will also go with the Bendini sound system. Looking to your build I am going to place my batteries where you have your speaker box. Question is, where are you going to place your batteries?
BR, Gregg
Thanks. That space was my first choice for the batteries but I couldn't find a good alternative place for the speakers. When I built the speaker box, I adjusted the height so I could use the space under them. I also placed the forward former with enough distance so that the space between the formers could be used for the batteries. The batteries I used for checking the space were four 7 cell 5,000 mAh packs. I'll be using 6 cell packs so they will be a little smaller than the test packs. As the photos show, I can get 2 packs under the speaker box and 2 packs inbetween the formers. I'll devise a way to secure the packs later.
Your Spitfire will be a sweet project.
Kirk
12-10-2012, 02:10 PM
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RE: Build - New Version CARF P-51 Mustang
I'm using the 6.25 inch spinner sold by Dino and hit a problem with the fit to the fuse. It fit around the cowl perfectly but did not fit the bottom of the fuse (see the first photo). I fixed this by adding some hysol to the inside of the fuse in the area that needed to be adjusted.I let the hysol cure for a couple of days.Then, using the spinner back plate as a guide, I sanded the fiber glass away until I reached the rough shape needed. Filler will be used to complete the fix.
Kirk
Kirk
12-10-2012, 02:14 PM
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RE: Build - New Version CARF P-51 Mustang
After fixing the above mentioned problem, I started with the filler. The seam and screws on the cowl that was sanded away earlier was filled and sanded. The seam on the top of the fuse between the cowl and wind screen was also sanded, filled, and sanded. The perimeter around the cowl was sanded in preparation for filler.
Kirk
Kirk
12-12-2012, 07:29 PM
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RE: Build - New Version CARF P-51 Mustang
Started the filler work around the cowl. Left side and around the back of the cowl has been completed. Next up is the right side and around the spinner.
Kirk
Kirk
12-19-2012, 07:42 PM
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RE: Build - New Version CARF P-51 Mustang
Work has slowed me down but I managed to do the filler workonthe right side of the cowl and around the spinner. I need to go back and add small amounts of filler to a couple of areas. The last photo shows how the chin scoop fix turned out.
Kirk
Kirk
12-20-2012, 03:53 PM
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RE: Build - New Version CARF P-51 Mustang
K sonn,
....your filler work on the spinner/cowl area is outstanding!!!!!
Really is giving it a look that IMOP needed some attention, I will definitely follow suit on mine
Best regards,
john
....your filler work on the spinner/cowl area is outstanding!!!!!
Really is giving it a look that IMOP needed some attention, I will definitely follow suit on mine
Best regards,
john
02-29-2020, 05:39 AM
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have a carf mustang I don't know the c/g measurement or where on the leading edge to measure from please reply if anybody has this information thankyou steve Roberts [email protected] //// 4017418254
