Originally posted by Heirmeistr
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Freewing F-4 drag chute mod
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RDjetdude
I ordered 2 of the DSM-44 servos as shown in the photos for my mod. These servos come with very short arms (yellow in color). I quickly realized that these yellow arms are too short for releasing the trigger. I see in the photos and video you are using a longer white arm for the trigger release. I tried all of my small servo arms but none will fit this servo. Do you know where I can get longer than stock servo arms that will fit the DSM-44 servo? Thank You. I am so close to finishing this mod and I am anxious to give it a try.
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I could not figure out (from searching the web) what longer servo arm would fit the DSM44 servo so off to the LHS I went. Traveling to the LHS is a last resort for me these days as it takes 1.5 - 2 hrs to travel there and back but sometimes it is necessary. At the LHS I did find some arms that fit, they are the E-flite EFLRS754. You just cant use the provided screw as it is a different thread.
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Originally posted by Helmsman52 View PostHi,
Here are some of the directions on how I go about making the drag chute for the Freewing F-4 Phantom.
The short kit comes with all the materials for building. I have penciled in all the cut lines and ribbon placement lines.
First lightly spray with spray mount. I usually spray one sec from three feet above cutting board. Then apply material to the cutting board.
Make sure to smooth out material nice and flat.
Using a rotary razor cut all slots, outer and center.
Cut 10 pieces of 1/16 ribbon at 20 inch lengths and place on a surface to be sprayed with adhesive. I spray about 18.5 exposed and the rest is covered
with tape on end for better handling. Make 3 or 4 passes of adhesive.
Now a apply ribbons quickly while adhesive is tacky onto the marked lines starting with a cross hair pattern then starting anywhere from left to right clockwise.
Press ribbon onto material. Don't worry about the ribbon tails being to even because they will be trimmed to about an inch later.
Now the fun part... slowly start peeling the material off the cutting board, ribbons will come off so be careful. The idea of gluing the ribbons is to aid during sewing.
I then set the chute to the side and flip the mat over and add some baby/talcum powder placing the chute glued side down to kill off the glue residue.
Next I take a poster board and iron to insure glue from the ribbons set better before sewing.
Cut ribbon tails to one inch all the way around and singe ends.
Time to sew. Straight stitch and back stitch at the beginning, center and end of each ribbon.
Now you are just about halfway done with your chute. Place to the side and get ready for suspension lines, shock and finally assembly.
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RCJetDude, I am so impressed with your beautifully done mods on the Freewing F-4. I can't stop chuckling over the cleverness, skill and functionality of it all. How the heck did you think this through so dang well. My hat is off to you, sir, very well conceived and constructed.
Now, how much does your kit cost and does it come with instructions and paint recommendations for the Jolly Roger version, despite the photos here on HS?
Thanks,
JE
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lt was a collaborative effort with Paul. He had the idea for the spring loaded rod, I just ran with it. It is fairly straight forward to install. It comes with the plunger diagram and I am always here to help answer any questions. My Jolly Roger was lightly sanded with 200 grit, wiped down with denatured alcohol and then a tac cloth, masked the canopy with green Frog tape, primed with white Rustoleum primer, masked with yellow Frog tape after first sticking it to my shirt several times then airbrushed with Model Masters acrylic gloss gull gray, semi-gloss black, Insignia yellow and I think Gunmetal on the tail. Paint the yellow on first, then the gull gray. I left the bottom just white primer. Callie graphics and no clear coat. Accents were done with Aluminum. Weathering was simply a wash with watered down Burnt Umber and wiped with a clean cloth. It looks as good today as the day I finished it.
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Paul Helmsman makes the chutes and can also provide the plunger assy. I can provide a short kit which is various pieces needed for the install. The main part is the fiberglass tail cone. I charge $30 shipped in the US, $45 International for the kit I make. You would need to provide your own servos.
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Originally posted by jpjet View PostRCJD, very reasonable. Is there a parts list from you, I have another club member who may want in, and we need exchange names and addresses via email as well as your preferred method of payment.
I'll wait to hear from you.
JE
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Mod is finished and works great - now on to painting and mounting on plane. I am wondering what the proper storage for the mod is? If it is stored cocked, does keeping the 4 springs compressed reduce their expansion force over time? If it is stored un-cocked, does keeping the trigger wire deflected cause it to develop a bend and not seat in the trigger slot properly over time? Also, is there anything (like corn starch or maybe baby powder) that needed to be used on the chute to allow it to open up more easily after being rolled up? Any feedback will be greatly appreciated!!
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Originally posted by paulsnapp View PostMod is finished and works great - now on to painting and mounting on plane. I am wondering what the proper storage for the mod is? If it is stored cocked, does keeping the 4 springs compressed reduce their expansion force over time? If it is stored un-cocked, does keeping the trigger wire deflected cause it to develop a bend and not seat in the trigger slot properly over time? Also, is there anything (like corn starch or maybe baby powder) that needed to be used on the chute to allow it to open up more easily after being rolled up? Any feedback will be greatly appreciated!!
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