Pulsar Biplane Build
08-14-2011, 04:47 PM
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RE: Pulsar Biplane Build
I have all the surfaces for the wings cut and boxed now. Ready to test fit hinges. I had to modify the wing panel attachment method due to the spar pieces not being in the kit. I am going to use 5/16" dowel as re-enforcers instead of the balsa rectangle pieces that are missing. Soon I will attach and do the tips once I have the wing panels glued together.
Kevin Clark
Kevin Clark
08-22-2011, 05:08 PM
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RE: Pulsar Biplane Build
I have the wings joined and the surfaces in place. I am still working on the tips. I decided to do them a little different than it called for in the plans and instructions.
Kevin Clark:
Kevin Clark:
01-04-2012, 08:34 PM
#29
RE: Pulsar Biplane Build
I'll revive this thread. Here is my Pulsar project. A buddy of mine got a bunch of Pulsars from what was left of Cass and one went to me. I got a new/bare fiberglass fuse along with a pair of covered wings and a donor fuse that had stabs. Basically a Pulsar mix and match.
I cut apart the donor fuse and pulled out the stabs and un-covered the wings I got. I guess some guys did not bother with the round tips as they did not have them. I, however, think the plane needs them (at least from a aesthetic standpoint) so I cut my own. I still need to sheet these over.
I have glassed the stabs and am working toward glassing the wings. I plan on painting this bird and entering it at the WRAM static display.
Power will be a YS 63.
I have cut CyA hinges for the stabs; not sure what I want to hinge the ailerons with. I don't like the exposed portion of the Robart hinges as per the plans, I may just double bevel the ailerons and go with CyA hinges there too.
I cut apart the donor fuse and pulled out the stabs and un-covered the wings I got. I guess some guys did not bother with the round tips as they did not have them. I, however, think the plane needs them (at least from a aesthetic standpoint) so I cut my own. I still need to sheet these over.
I have glassed the stabs and am working toward glassing the wings. I plan on painting this bird and entering it at the WRAM static display.
Power will be a YS 63.
I have cut CyA hinges for the stabs; not sure what I want to hinge the ailerons with. I don't like the exposed portion of the Robart hinges as per the plans, I may just double bevel the ailerons and go with CyA hinges there too.
01-10-2012, 02:03 PM
#31
RE: Pulsar Biplane Build
I sanded and primed the fuse. Overall it is looking good but is going to take a bunch of sanding to be award worthy.
The wings and struts are about to get glassed as well.
The wings and struts are about to get glassed as well.
01-10-2012, 03:00 PM
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RE: Pulsar Biplane Build
Is that a YS .63??? I bet that will be one great combo on the Pulsar. That is very light and powerful and plenty of power. I am going with an electric set up so that I can compete in SPA this coming year. I need to hurry and finish mine so that I can start trimming.
Looks great.
Kevin Clark
Looks great.
Kevin Clark
02-26-2012, 05:35 PM
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RE: Pulsar Biplane Build
Well, I have been a busy little bee. I ordered all my electric stuff and have started putting it all together and testing. I have also been trying to figure out how to fit everything inside the fuse. So far everything is working out great. I even was able to spin up my motor and do some testing.
I went with a Rimfire .80 (500kv) motor, 80A ESC, and a 6s (22.2v) 4000mah lipo set with a new charger. I am looking to use a 13x8, 13.5x10,11,12,13,or 14. Not sure which will put me at the 1400 allowable legal watts. I will have to experiment and find out. I have added some pics of everything. I am planning on mounting the motor case forward so the shaft is exposed to put a collett style prop adapter on. I believe the ply circle (pictured below) in place of the aluminum X mount provided with the motor will be sufficient. I plan on gluing the ply circle holder in place with resin and glass to the fuse nose for the motor mount. Maybe you electric guys can weigh in on that and let me know if it is under engineered or OK for this application. I am not exactly sure being my first electric set up. At 7 pounds all up weight that would put the system at 200watts per pound and should provide unlimited vertical. I will just have to see about that once I get it off the ground.
I went with a Rimfire .80 (500kv) motor, 80A ESC, and a 6s (22.2v) 4000mah lipo set with a new charger. I am looking to use a 13x8, 13.5x10,11,12,13,or 14. Not sure which will put me at the 1400 allowable legal watts. I will have to experiment and find out. I have added some pics of everything. I am planning on mounting the motor case forward so the shaft is exposed to put a collett style prop adapter on. I believe the ply circle (pictured below) in place of the aluminum X mount provided with the motor will be sufficient. I plan on gluing the ply circle holder in place with resin and glass to the fuse nose for the motor mount. Maybe you electric guys can weigh in on that and let me know if it is under engineered or OK for this application. I am not exactly sure being my first electric set up. At 7 pounds all up weight that would put the system at 200watts per pound and should provide unlimited vertical. I will just have to see about that once I get it off the ground.
02-26-2012, 06:26 PM
#36
RE: Pulsar Biplane Build
ORIGINAL: patternflyer76
Is that a YS .63??? I bet that will be one great combo on the Pulsar. That is very light and powerful and plenty of power. I am going with an electric set up so that I can compete in SPA this coming year. I need to hurry and finish mine so that I can start trimming.
Looks great.
Kevin Clark
Is that a YS .63??? I bet that will be one great combo on the Pulsar. That is very light and powerful and plenty of power. I am going with an electric set up so that I can compete in SPA this coming year. I need to hurry and finish mine so that I can start trimming.
Looks great.
Kevin Clark
02-26-2012, 06:32 PM
#37
RE: Pulsar Biplane Build
ORIGINAL: patternflyer76
Well, I have been a busy little bee. I ordered all my electric stuff and have started putting it all together and testing. I have also been trying to figure out how to fit everything inside the fuse. So far everything is working out great. I even was able to spin up my motor and do some testing.
I went with a Rimfire .80 (500kv) motor, 80A ESC, and a 6s (22.2v) 4000mah lipo set with a new charger. I am looking to use a 13x8, 13.5x10,11,12,13,or 14. Not sure which will put me at the 1400 allowable legal watts. I will have to experiment and find out. I have added some pics of everything. I am planning on mounting the motor case forward so the shaft is exposed to put a collett style prop adapter on. I believe the ply circle (pictured below) in place of the aluminum X mount provided with the motor will be sufficient. I plan on gluing the ply circle holder in place with resin and glass to the fuse nose for the motor mount. Maybe you electric guys can weigh in on that and let me know if it is under engineered or OK for this application. I am not exactly sure being my first electric set up. At 7 pounds all up weight that would put the system at 200watts per pound and should provide unlimited vertical. I will just have to see about that once I get it off the ground.
Well, I have been a busy little bee. I ordered all my electric stuff and have started putting it all together and testing. I have also been trying to figure out how to fit everything inside the fuse. So far everything is working out great. I even was able to spin up my motor and do some testing.
I went with a Rimfire .80 (500kv) motor, 80A ESC, and a 6s (22.2v) 4000mah lipo set with a new charger. I am looking to use a 13x8, 13.5x10,11,12,13,or 14. Not sure which will put me at the 1400 allowable legal watts. I will have to experiment and find out. I have added some pics of everything. I am planning on mounting the motor case forward so the shaft is exposed to put a collett style prop adapter on. I believe the ply circle (pictured below) in place of the aluminum X mount provided with the motor will be sufficient. I plan on gluing the ply circle holder in place with resin and glass to the fuse nose for the motor mount. Maybe you electric guys can weigh in on that and let me know if it is under engineered or OK for this application. I am not exactly sure being my first electric set up. At 7 pounds all up weight that would put the system at 200watts per pound and should provide unlimited vertical. I will just have to see about that once I get it off the ground.
Firstly I'd use a bolt-on collet on the end of the motor opposite the shaft (like I have pictured). Then I would simply use the X mount and bolt it to the back of the motor (not the front where you have the ply) and bolt that to the stock glow firewall (or glue a normal firewall in if your fuse does not have one. You will be able to get to the screws on your X mount through the front.
03-10-2012, 03:19 PM
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RE: Pulsar Biplane Build
Hi there. I bought a version 1Pulsar in 1979. Ifitted a Saito 80 flat twin4 stroke engine and later a .45 OS 2 stroke. I've now bought a new Saito 90TS which I plan to put in a 10-15% over-sized Pulsar. Ihave plans but need to get some dimensions of the fuselage width so Ican make a new one. Could you help me out?I need to firstly draw a plan, so I need measurements at intervals along the fuse. Iwould like to see more of your project and especially some video.
uploaded pdf file of fuselage plan sizes/specifications.
uploaded pdf file of fuselage plan sizes/specifications.
03-17-2012, 03:00 PM
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RE: Pulsar Biplane Build
I will get you the dimensions once I get them all measured for you and the time. Good luck with your project.
Kevin Clark
AMA 340037
SPA #427
Kevin Clark
AMA 340037
SPA #427
03-17-2012, 03:07 PM
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RE: Pulsar Biplane Build
Some pics of the progress..... I have to get her done for this coming season.... I am pleased with the progress I just need to produce more in less time.
03-19-2012, 09:32 AM
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RE: Pulsar Biplane Build
looks great Kevin, can't wait to see it on the flight line this season. We had a pulsar when I was a kid, always liked that airplane.
03-20-2012, 02:44 PM
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RE: Pulsar Biplane Build
Thanks Eric. How is your KA going??? I hope to see it out as well this year. If I get the Pulsar done in time I am planning on trying to hit the Knoxville contest in May.
Kevin
Kevin
03-21-2012, 06:17 AM
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RE: Pulsar Biplane Build
I hope you get it done in time. I bet that bipe will really "present" the maneuvers well. I remember ours looked great doing the maneuvers. I have often considered building a Sunray. Growing up a fellow clubmember had both the 60 size and he built a reduced 40 size as well, great flying airplanes as well. Nothing looks more graceful than a bipe in my opinion. No progress on my KA, cores cut but that's about it. It's been a really tough winter to make time to get in the workshop.
09-06-2012, 04:36 PM
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RE: Pulsar Biplane Build
Update for anyone interested. My 15% bigger Pulsar is now in construction.There are a few mods thatwill appeal to any would bemodellers.At this point, I will only mention one... The mounting of amotor into the original Pulsar made impossible tochangeto or upgrade to anothermotor or change the mounting of an alternative motor in anyway, without cutting awayand/or repairing the nose area. Ihave simply designed the fuselage to start at the firewalland the f/glass engine cover is then attached.optional engine covers are a possibility, to suit different motors.Mine is for a Saito flat twin 90TS.
Simulator version - A sim model of the this 'facelift' Pulsar is available soon for use in RC DeskPilot. Seefirst 3D picture...
Simulator version - A sim model of the this 'facelift' Pulsar is available soon for use in RC DeskPilot. Seefirst 3D picture...
11-21-2012, 10:26 PM
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RE: Pulsar Biplane Build
I am in process of ressurecting my old Pulsar and fitting it with new electronics...Can someone tell me whre the recomended CG is.
It looks like "back when" I had added quite a bit of lead to the tail
Thanks,
Ken
It looks like "back when" I had added quite a bit of lead to the tail
Thanks,
Ken
11-22-2012, 08:20 AM
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RE: Pulsar Biplane Build
I'm really liking this renascence of classic planes! I remember very vividly the lime green Pulsar my dad built and flew when I was little. I'll have to see if I dig up some old picture of it. I loved the slick lines of a pattern plane with two wings. Is this having your cake and eating it, too?
11-22-2012, 09:14 AM
#49
RE: Pulsar Biplane Build
ORIGINAL: BUCKETOBOLTS
I'm really liking this renascence of classic planes! I remember very vividly the lime green Pulsar my dad built and flew when I was little. I'll have to see if I dig up some old picture of it. I loved the slick lines of a pattern plane with two wings. Is this having your cake and eating it, too?
I'm really liking this renascence of classic planes! I remember very vividly the lime green Pulsar my dad built and flew when I was little. I'll have to see if I dig up some old picture of it. I loved the slick lines of a pattern plane with two wings. Is this having your cake and eating it, too?
+1
Brian
11-22-2012, 09:32 AM
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RE: Pulsar Biplane Build
ORIGINAL: patternflyer76
More Pics....
More Pics....
Nice work as usual. I can see why it might be inviting to mount the motor as you have but I too would be concerned with what you have done. Those "thin filament" pieces of ply (1/8" I presume) left due to the vent holes you've made would be of much concern to me.
If you really want to mount the motor in that direction, I would definitely use the X-mount to spread the torque over a wider area and put it closer to the bond point of the FW to the fuse. Also, this will allow you to use proper bolts through the mount otherwise you are relying on small "metal-to-metal" intended 4 mm screws to carry the load. This is why the X-mounts are made, to better anchor the torque.
Personally I would opt for the reverse approach and mount the motor in "glow" fashion. This though assumes that the motor can can be passed through the front nose ring, otherwise you have a complication. Venting the motor is much easier if mounted like this.
You can expect that Rimfire to put out gobs of torque. It might be worth checking out how GP mounts that particular motor on a couple of ARF's they make; their bipe and the Extra. They probably have a ply mount framework which wouldn't do on the Pulsar though.
David