RE: New Hangar 9 1.50 P-51 Build (Full Version)

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FLYING HILLBILLY -> RE: New Hangar 9 1.50 P-51 Build (2/4/2007 9:12:31 PM)

i got hooked on air about 2 years ago when i built the 60 size mustang had some bad luck with landing gear servos i got cought in a strong cross wind when i was touching down
striped the landing gear servo done a lot of damage to the plane i said then that it would be air from now on



FLYING HILLBILLY -> RE: New Hangar 9 1.50 P-51 Build (2/4/2007 9:53:30 PM)

THANKS FOR THE HELP SPITPILOT I'LL CHECK IT OUT



Rip n Bank -> RE: New Hangar 9 1.50 P-51 Build (2/4/2007 10:01:24 PM)


quote:

ORIGINAL: Spitpilot

OK, so where are these shots?


Spitpilot,

Just click the "Gallery" link at the bottom left of any of my posts, including this one.

Bo



1080tommy -> RE: New Hangar 9 1.50 P-51 Build (2/5/2007 1:04:47 AM)

Here she is. All I have to do is break in the motor and fly. I built the plane stock according to the manual and power is a SAITO 1.80 with an APX 16x8 prop. The only problem is that it is now about -1 degree outside. I can't wait til spring. The Hellcat is also Hangar 9 and these two planes are replacements for the other planes damaged in December when my basement flooded. Oh yeah, I will be painting the spinner yellow also. Hope all your builds go as smooth as this one did.


Tom



Rip n Bank -> RE: New Hangar 9 1.50 P-51 Build (2/5/2007 3:36:57 AM)


quote:

ORIGINAL: 1080tommy

Here she is. All I have to do is break in the motor and fly. I built the plane stock according to the manual and power is a SAITO 1.80 with an APX 16x8 prop. The only problem is that it is now about -1 degree outside. I can't wait til spring. The Hellcat is also Hangar 9 and these two planes are replacements for the other planes damaged in December when my basement flooded. Oh yeah, I will be painting the spinner yellow also. Hope all your builds go as smooth as this one did.


Tom


Looks great, Tom!

Can't wait to see a maiden flight report from you soon.

Weather here in Colorado sucks, too. Seven snow storms in seven weeks, beginning 5 days before Christmas. Three days ago it was -8 degrees F. Snow drifts still cover the ground almost everywhere! Worst winter for snow here since 1914.

Thank goodness for build projects like this one that help keep the dream alive!

Bo



1080tommy -> RE: New Hangar 9 1.50 P-51 Build (2/5/2007 5:23:05 AM)

You guys have definitely had a worse time then us over here in Illinois. Interesting story is that until about three weeks ago people were flying. We had weather in the 50's. However, my insurance company took their sweet time getting out to estimate my damages. People were saying that we would be able to fly all winter which would be very unusual for us. I told them just wait until my planes are done and there will be snow and cold. Just got both planes to were I could have them in flying condition and wham, the coldest weather of the year. I can't even fly my T-rex heli, becuase it is so cold the rotor head will come apart. I have to say all you guys on this site are great. I have been a member of several websites like this and there is consistentley great, informative posts and limited negative useless posts. I have only been building since august of last year, and flying since June of last year, and just hope that future builds will be as good as some of yours. Here's some pics of the planes I lost. The Somethin Extra is a kit, and my first covering job. Man when that baby flew I fealt great becuase I had put so much time and effort into the build. The unfinished it was going to be a 28% Edge 540, however it was basically submerged when the pipe in my basement broke. Oh well, could have been worse. I just can't wait until spring. Thanks for all the great posts on this and many other planes.

Tom



captainron -> RE: New Hangar 9 1.50 P-51 Build (2/5/2007 2:30:27 PM)

RIP N BANK,
Thanks for the pics of your hanger. Naturally my favorite is the Hanger 9 P-51 60. I am a Mustang addict. I have 4, all differant sizes.
Also, started the 220 this weekend. Let me fill you in on someting. THIS IS ONE SWEEEET ENGINE!! I bolted her up to the breakin stand. With manual in hand, primmed her up, put the glow burner on her, pulled her through by hand a half dozen times, felt that tell tell sign ( bump ) when she fired. Hit her with my old 90 size electric starter and away she went. ran a full tank through at about 2500 RPM. You talk about oil! at 5 1/2 turns rich, I had so much on the ground, it was melting the snow. After the first shut down, I felt the cylinder head, cool as a baby's but in a winter storm. Fueled her again. Again she took right off. Fired immediatly, this baby likes to run. Got a good 20 minutes on her. Shut her down, loaded my P-40 in the car and went flying. More good news. My student, (buddy ) who I been working with all last summer, finally soloed Sunday. First take off and landing.

REINCARNATE,
LOVE THE PICS OF THE BIG 51. She looks ready and willing to give you plenty of thrills. Nice job on the exhaust residue behind the exhaust manifolds. Love that realism. I like RIP N BANKS idea of carving out the fuse a little bit, making it possible not to have to do all the micro and epoxy work. Yes, I'm going to remove the covering. I wasn't planning on using any clear. Are you just spraying clear dope over eveything to seal her up? I already sealed the engine compartment with 5 coats of brushed on clear.



reincarnate -> RE: New Hangar 9 1.50 P-51 Build (2/5/2007 8:23:40 PM)

Yeah Cap, I'll clear flat the whoel airframe so that it matches up where I had to seal the paint I put on over the ultracoat. Will help take a little of the shine off to, since with all that gunpowder and exhaust residue, she evidently didn't role off the assy line yesterday. You can't see a lot of the detail in the pics, but there is streaking on the leading edge of the exhaust pipes from the one's behind it, and the exhaust shrouds are drybrushed to simulate the heat stress the heads would have under use. She's only new to me. In my mind she's flown 1000 times and wanted her to look it.

Be careful if you're thinking about carving out the fuse. There is a spar just about in the middle of the shroud that you'll get in to, and weakening the front end with that big engine might not be a great idea. Just a thought.



solarmusic-RCU -> RE: New Hangar 9 1.50 P-51 Build (2/5/2007 8:39:03 PM)

Cut some 1/16 th balsa to fit inside the plastic stack, flush with the edges and attatch with CA. Sand a little to true up. Now the whole thing has some substance, and a large area to hold the CA. Mark the location of the stack on the fuse. Cut away the film 1/16 inside the lines. Dry fit the stack a few times and then go for it. Wet the area with accellerator...put medium CA on the back of the balsa filled stack and carefully place in the exact place you want it. When you pres it down, the CA sets and holds against the slight curve. Later you can poke a little filler where it is needed, but I didn't have to.



reincarnate -> RE: New Hangar 9 1.50 P-51 Build (2/5/2007 9:14:42 PM)

Sorry Solar, those vac formed manifolds went the way of the rest of the plastic in the box. Mine (and I believe Captain Rons?) are Tony Howards great looking mods. Too nice of an airplane and too much time and money in the build to put on the supplied ones. To each his own. I've got the vac formed on the two smaller 51's I currently own though, so maybe I'm indecisive. Wait, no I'm not.



Rip n Bank -> RE: New Hangar 9 1.50 P-51 Build (2/5/2007 9:19:18 PM)


quote:

ORIGINAL: captainron

RIP N BANK,
Thanks for the pics of your hanger. Naturally my favorite is the Hanger 9 P-51 60. I am a Mustang addict. I have 4, all differant sizes.
Also, started the 220 this weekend. Let me fill you in on someting. THIS IS ONE SWEEEET ENGINE!! I bolted her up to the breakin stand. With manual in hand, primmed her up, put the glow burner on her, pulled her through by hand a half dozen times, felt that tell tell sign ( bump ) when she fired. Hit her with my old 90 size electric starter and away she went. ran a full tank through at about 2500 RPM. You talk about oil! at 5 1/2 turns rich, I had so much on the ground, it was melting the snow. After the first shut down, I felt the cylinder head, cool as a baby's but in a winter storm. Fueled her again. Again she took right off. Fired immediatly, this baby likes to run. Got a good 20 minutes on her. Shut her down, loaded my P-40 in the car and went flying. More good news. My student, (buddy ) who I been working with all last summer, finally soloed Sunday. First take off and landing.

REINCARNATE,
LOVE THE PICS OF THE BIG 51. She looks ready and willing to give you plenty of thrills. Nice job on the exhaust residue behind the exhaust manifolds. Love that realism. I like RIP N BANKS idea of carving out the fuse a little bit, making it possible not to have to do all the micro and epoxy work. Yes, I'm going to remove the covering. I wasn't planning on using any clear. Are you just spraying clear dope over eveything to seal her up? I already sealed the engine compartment with 5 coats of brushed on clear.


Captain,

Glad you like the pics. Yep, my "baby 'Stang" is my favorite plane so far, but I can already see that its big brother is going to probably bump it from the throne!

Man, was that great reading about your 220 break-in! LOL's about the spewing fuel & oil when running that rich. One wants no open flames around during the break-in run, that's for sure!

I'm amazed your electric starter would turn her over. Is that with the spinner (and a corresponding larger diameter rubber insert on the starter)?

Different subject: I just talked with Kelvin @ Keleo this morning and I'm about 10 days to 2 weeks from receiving my Pitts-style muffler from him. He did offer to change my Pitts muffler from a "two-down-pipe-from-the-cross-pipe" configuration to a single, slightly larger "oval" down pipe angled backwards so that it passes out the angled fuselage exhaust vent w/o needing to cut further into the chin cowl. I readily agreed with that offer!

Bo




solarmusic-RCU -> RE: New Hangar 9 1.50 P-51 Build (2/5/2007 9:19:28 PM)

Well, its a good trick for attachment of the flimsy ones. I usually get away with them because I do a lot of smoke streaks etc.



reincarnate -> RE: New Hangar 9 1.50 P-51 Build (2/5/2007 9:40:26 PM)

quote:

ORIGINAL: solarmusic-RCU

Well, its a good trick for attachment of the flimsy ones. I usually get away with them because I do a lot of smoke streaks etc.

Without a doubt the best way to attach them. Hope you didn't take that wrong.

Rip,
I wanna see that exhaust when Kelvin gets it to you. The 47 I'm building next (fall?) is trying to talk me into letting her have some of these. Ferocious Frankie just growls at her and tells her to get back in her box. He's still grouchy from the exhaust surgery that he had to have.[8D]



captainron -> RE: New Hangar 9 1.50 P-51 Build (2/6/2007 12:00:06 AM)

RIP N BANK,
Yes sir, 5" Dave Brown spinner was on and yes I used the stock rubber insert. I just turned her back against the compression stroke, held it up to that big spinner and let her rip. It seemed to spin her through just fine. I'm tellin ya, after about maybe 10 spins through the compression stroke that big 220 is barking at ya. SWEET!

REINCARNATE,
Thanks for the info on the spar. I want to do it right, so I'll probably just follow Tony's instructions.

DANG, I LOVE THIS HOBBY, CAPTAIN RON.



Rip n Bank -> RE: New Hangar 9 1.50 P-51 Build (2/6/2007 2:56:17 PM)


quote:

ORIGINAL: reincarnate

quote:

ORIGINAL: solarmusic-RCU

Well, its a good trick for attachment of the flimsy ones. I usually get away with them because I do a lot of smoke streaks etc.

Without a doubt the best way to attach them. Hope you didn't take that wrong.

Rip,
I wanna see that exhaust when Kelvin gets it to you. The 47 I'm building next (fall?) is trying to talk me into letting her have some of these. Ferocious Frankie just growls at her and tells her to get back in her box. He's still grouchy from the exhaust surgery that he had to have.[8D]


Reincarnate,

Yep, I'll definitely post some pics of the Keleo exhaust shortly after it arrives.

Regarding the mounting my fake, scale exhaust: the curve under the exhaust location is where the 1/8"+ balsa exterior sheeting bends around the outer edge of the firewall and begins curving in towards the nose as part of the fixed cowl.

I haven't positioned my exhaust yet and trimmed away the ultracote underneath (mainly because I'm still examining web-based photos of real P-51's to better determine where to exactly position it), but it seems the balsa sheeting that's wrapped over the edge of the firewall could be hogged out under the exhaust, even down to the outer edge of the firewall, w/o weaking the overall structure. The base of the exhaust is only 7/8" wide.

After all, the main structural element in this area of the fuselage are the two internal, built-up longitudinal "spars" on either side of the gas tank. These connect the firewall to the bulkhead at the front of the servo/receiver bay, both connecting ends of which I have already fiberglass reinforced together.

I won't know more until I get under the covering, but if it looks at all questionable to remove any of the sheeting under the middle of the exhaust, I'll just build up under each end of it, instead.

Bo



Ski-pilot -> RE: New Hangar 9 1.50 P-51 Build (2/9/2007 6:23:00 PM)

Hi,

Its keeping my spirits up to see that you all have done so well building the new Mustang!

I´m still waiting for mine to arrive - its terribly delayed and its agonizing I can tell you... I have a lot of accessories in place, Robart offset struts, the TopFlight cockpit, an Elite Force pilot and Keleos wonderful exhausts ordered. But no plane. ARGH!

In the meanwhile, has anyone measured the exact diameter of the supplied damped gear struts? The Robart offset struts 662R/L are 7/16" (11.11mm). Would these fit into the stock retract mechanism with a little or not-so-little modification in your opinion? Still not decided on going servo or air. The Robart struts are by the way very stiff in compression. I´m measuring about 5kg/10mm compression, and the total available travel is about 27mm.

Also - Spitpilot - if you are reading this - how much modification to the area around the engine did you have to do to accomodate the Keleo scale exhausts? Could you provide a picture looking under the hood?

Best wishes,

/Petter



Rip n Bank -> RE: New Hangar 9 1.50 P-51 Build (2/9/2007 10:43:09 PM)


quote:

ORIGINAL: frieberg

Hi,

Its keeping my spirits up to see that you all have done so well building the new Mustang!

I´m still waiting for mine to arrive - its terribly delayed and its agonizing I can tell you... I have a lot of accessories in place, Robart offset struts, the TopFlight cockpit, an Elite Force pilot and Keleos wonderful exhausts ordered. But no plane. ARGH!

In the meanwhile, has anyone measured the exact diameter of the supplied damped gear struts? The Robart offset struts 662R/L are 7/16" (11.11mm). Would these fit into the stock retract mechanism with a little or not-so-little modification in your opinion? Still not decided on going servo or air. The Robart struts are by the way very stiff in compression. I´m measuring about 5kg/10mm compression, and the total available travel is about 27mm.

Also - Spitpilot - if you are reading this - how much modification to the area around the engine did you have to do to accomodate the Keleo scale exhausts? Could you provide a picture looking under the hood?

Best wishes,

/Petter


Petter,

Sorry to hear about your long wait for this plane! I think you'll find it well worth it, though.

I've search the web for the Elite Force WWII American pilot ("Doc Miller") for this plane. From the Blue Box Toys web site to their listed distributors, no luck. Man, I'll say right now: some of these guys have WEIRDLY structured web pages! Anyway, can't find anyone selling the "Doc" in North America. Anybody know where these can be had?

The PAINTED stock struts are exactly 10mm in diameter. To get them fully into the clamping housing in the retract, I had to grind off the layers of paint on the end of the strut (making it <10mm), and they were still a very tight fit. I don't see how a strut measuring 11.1mm will fit into the stock gear unless you grind out the diameter of the clamp. It might also be possible to remove the set screw entirely, and pry apart the jaw ends of the clamp to accept a slightly larger diameter strut, but I didn't want to break mine by trying.

Oh, before I forget, the technical support folks at Horizon strongly advise against using a 6 volt battery for JR791 retract servos. Even though the JR web site lists 6 volts as supported (with a corresponding 285 oz of torque!), they apparently tend to "burn out" from overworking themselves at the ends of their travel with that voltage.

So, I'm changing my dual on-board battery set-up from two 6 volt batteries (one for Rx, one for the retracts) to a 6 volt for the Rx and 4.8 volt for the retracts.

Bo





Rip n Bank -> RE: New Hangar 9 1.50 P-51 Build (2/9/2007 10:47:32 PM)

Grrrrr, didn't put that smiley/winky in my last post! It was merely a "close parenthesis". Might hafta turn that off in "profile"...



reincarnate -> RE: New Hangar 9 1.50 P-51 Build (2/10/2007 1:00:07 AM)

Rip... Your killin me here! [8D] Just sent an e-mail to JR asking them the 6v battery question. Warranty may cover the servo's if they burn up, but I don't relish the thought of sliding the 51 in on her belly if they fail. If they won't guarantee servo's at 6v, I may switch to air, and save the servo's for a later project. Will let you know what they say. By the way, what prompted you to ask Horizon that question? Just curious.



san26141 -> RE: New Hangar 9 1.50 P-51 Build (2/10/2007 1:01:06 AM)

!!!!!!!!!!!!!!!!I GOT MINE IN TODAY!!!!!!!!!!!!!

....girlfriend is PO'ed. She probably expects something as "$$$$" on V-day.....sure...I'll get her the p-51 PTS!!!! Heck I'll even put her name on it..."Dangerous Debbie"....


Dang that box is big....I gotta go and play.....



Rip n Bank -> RE: New Hangar 9 1.50 P-51 Build (2/10/2007 1:42:54 AM)


quote:

ORIGINAL: reincarnate

Rip... Your killin me here! [8D] Just sent an e-mail to JR asking them the 6v battery question. Warranty may cover the servo's if they burn up, but I don't relish the thought of sliding the 51 in on her belly if they fail. If they won't guarantee servo's at 6v, I may switch to air, and save the servo's for a later project. Will let you know what they say. By the way, what prompted you to ask Horizon that question? Just curious.


Rein,

Read about the "791 vs 6-volt" issue elsewhere on RCU. Thought I'd dig into it. Heck, it's ONLY a $1500 airplane, right?

Checked the JR web site: 6 volt is listed (ie, supported). Sent an email to Horizon (primary outlet?): no answer (yet). Called them: "6-volt is fine." Got an email a day later (two independent events): "JR791 is 4.8 volt only." Called them again, immediately: "JR791 will eventually burn up at 6 volts." Told them: "TAKE THE 6-VOLT REFERENCE OFF THE WEB SITE!!!" (duh)

Bottom line: this thing will do 260 oz. at 4.8 volts, why do more? Run the Rx (and all other servos) at 6 volts, and power the retracts with a separate 4.8 volt battery. The extra battery, and "Y" harness, is much cheaper than switching to air (assuming you already bought the JR's).

Bo



Ski-pilot -> RE: New Hangar 9 1.50 P-51 Build (2/10/2007 6:16:41 AM)

Hi,

Thanks Bo for the update on the stock struts!

Regarding the Elite Force pilot, I was not able to find "Doc Miller" anywhere either. So in the end I settled for the "Donald Moore" guy. Its a British desert pilot whose upper torso is the most similar to a US pilot that I´ve been able to find. All the scale details like goggles, life vest, parachute and working 6-point buckle are very neat and you could not mistake him for being anything else but an Allied pilot. I guess the mustache is a bit of a British give-away there...

You´ve got to make sure though that noone peers too deep into the cockpit and spots his bare knees! [:)]

Good luck,
/Petter



reincarnate -> RE: New Hangar 9 1.50 P-51 Build (2/10/2007 12:37:09 PM)

You're the man Rip. Hope your legs don't get tired running all of these errands for the crowd. Already own all of the air junk, already bought the dang 791's, just don't want to add another dang battery to already fat bird (lots of scale detail. Gonna post an exact weight of mine later today). Asked Danny @ JR in radio thread, so if you want to follow what he says, check that. Here is why I'm still stalling on this. You can't adjust the travel or end points of gear channel/servo. So if you have your servo set up correctly, it will run to its end point and stop without overdriving. Just thinking out loud, not about to outguess the experts. Like you said, "It's only a $1500 airplane".
Now stop messing with my head![:D]
How's the exhaust coming? I'm looking forward to seeing it.
Keep up the great work.



Rip n Bank -> RE: New Hangar 9 1.50 P-51 Build (2/10/2007 6:37:03 PM)


quote:

ORIGINAL: reincarnate

You're the man Rip. Hope your legs don't get tired running all of these errands for the crowd. Already own all of the air junk, already bought the dang 791's, just don't want to add another dang battery to already fat bird (lots of scale detail. Gonna post an exact weight of mine later today). Asked Danny @ JR in radio thread, so if you want to follow what he says, check that. Here is why I'm still stalling on this. You can't adjust the travel or end points of gear channel/servo. So if you have your servo set up correctly, it will run to its end point and stop without overdriving. Just thinking out loud, not about to outguess the experts. Like you said, "It's only a $1500 airplane".
Now stop messing with my head![:D]
How's the exhaust coming? I'm looking forward to seeing it.
Keep up the great work.


Don't mind the "errands." I'm mostly chasing these things down for my own project, and peace of mind, so it's easy to share what I find along the way.

I'm going to be interested in your final weight. In the overall scheme of things, I believe the weight of an extra (4.8 volt) battery (3 oz.) adds very little additional wing loading in a plane that's known to be pretty reasonable in that department.

My scale exhaust (now mounted!!; pics coming soon!) weights next to nothing. Fiberglass reinforcing of firewall, wing mount and gear rails: what, an ounce or two? Upsized gas tank (23 oz stock to 27 oz World Models): +1.5 oz more (empty, of course). My heaviest addition so far is the on-board glow system with self-contained battery: 3.5 oz. All in all, my add-on's are just over 1/2 lb. Now, something tells me the Elite Force pilot weights alot (Petter: did you weigh yours before installing?). Still don't know if I'll add one of those, yet, even if I find one.

I'm no expert on retract servos, except I know, as you state, they have no adjustment in their end points. The Horizon techie said something like if there is any linkage resistance to the servo reaching it's end point, it'll burn itself out trying to hold end-point using 6 volts (or something to this effect). Using these inputs, I ordered both a 6-volt battery, for the Rx and HiTec 545 servos (they love 6-volt), and a 4.8 volt battery for the 791 retracts (both Sanyo NiMH 2500 mAh) from Batteries America.

Gotta go put another Cub Yellow coat on my DB spinner, eat lunch, then I'll take some pics of my scale exhaust and post them...

Cheers!

Bo




kqutob -> RE: New Hangar 9 1.50 P-51 Build (2/10/2007 6:47:16 PM)

Did anyone fly this bird yet ? Any reviews or test flights anywhere??



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