RE: New Hangar 9 1.50 P-51 Build  
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RE: New Hangar 9 1.50 P-51 Build - 3/1/2007 7:11:21 PM   
captainron


 

Posts: 183
Joined: 6/19/2006
From: PUEBLO WEST, CO, USA
Status: offline 		RIP N BANK,
I FIGURED IT OUT,
HANGER 9 SENT OUT ALL THE BAD KITS TO THE GUYS WHO ARE GOOD AT AND WHO DON'T MIND MODIFYING THINGS TO MAKE THEM WORK. THEN, THEY SENT OUT ALL THE GOOD KITS TO GUYS LIKE ME THAT JUST WANT TO BUILD IT FROM THE BOX AND GO FLY EM'.
AFTER READING YOUR LAST POST, I RAN OUT AND CHECKED MY WINGS. JOINED THEM FOR A DRY RUN WITH THE SPAR AND THEY SEEMED TO BE OK. BUT, MAYBE MY TOLERANCES ARE A LITTLE LESS STRINGENT THAN YOURS. WEATHER GETING BETTER IN COLORADO, WON'T BE LONG NOW. EXCEPT FOR WEDNESDAY. SHOULD BE A NICE WEEKEND, GO GLY SOMETHING.

DANG, I LOVE THIS HOBBY. CAPTAIN RON.
quote:

ORIGINAL: Rip n Bank


quote:

ORIGINAL: Jarrah

Bo, looks great, i am reallly impressed with your access hatch. I was actually going to do something similar but i think ill mount all my switches in the cockpit and then hold that on with magnets ifi can find some sutible ones. Hopefully should start mine with the keleo in the next few days.


Thanks, Jarrah. I'm pleased with the way the hatch came out, too!

On a different note: I'm curious if anyone ended up with a "too short, too thin" wing spar. I was going to epoxy the wing together the other night and found that the spar was 3/16" short on each end, (3/8" overall). It wasn't thick, or tall, enough either and really rattled around in the wing receiving pockets.

I don't feel comfortable making up all that empty space in the pockets with epoxy, so I just finished making a replacement hardwood spar that's 3/8" longer, and a hair bigger in thickness and height. I'm sanding it down carefully to a perfect fit that still has space for a good coating of epoxy on all sides.

Much as I love this plane, I have to say that my spar problem, the wing replacement I had to do because they drilled the flap holes too big, and the noticable "undulating" surface of the fuselage and the wing under the ultracoat, that this is the poorest quality H9 plane I've built so far.

That won't stop me from lovin' it when I'm ripping down the runway 10' off the deck, but given the price, I'm a bit disappointed with this one...

Bo






(in reply to Rip n Bank)
       Post #: 301

RE: New Hangar 9 1.50 P-51 Build - 3/1/2007 11:13:52 PM   
Rip n Bank


 

Posts: 501
Joined: 3/12/2005
From: Fort Collins, CO, USA
Status: offline 		Captain Ron,

LOL! Well, I definitely got one of the "Caution: Some custom, and repair, work required" labeled boxes!

Do this please: using the apex of the two dihedral angles, draw a centerline on your spar with a pencil. Check to make sure it's equidistant from the ends. Then, slide the spar all the way into one wing and mark the spar with a pencil where the inside-most rib runs across it. Then, keeping the spar orientation the same (same side forward), slide the spar into the other wing pocket all the way, and scribe the another pencil line for that depth of insertion. Chances are, you have three lines showing. At issue is how far apart the lines are.

Now, perfect would be all three lines were pretty much on top of each other, or at least close. If not, then it's likely the spar slid in past the center line in each wing. so, let me know how far apart your outermost lines are.

For me, the line for the right wing inside edge was LEFT of the center line, meaning the spar went in too far and, therefore the spar wasn't long enough. Same thing for the left wing. These two outside-most lines were 3/8" apart (3/16" to either side of the center line), which is a lot of missing wood from the length of the spar (and correspondingly, a lot of epoxy fill, which isn't as strong as wood when it comes to occupying this void!). And, like I said, it's also too thin (wiggles a lot front to rear in the pocket) and short in height (wiggles a lot up and down in the pocket).

Conclusion: H9 is building the wing spar pockets too big, or making the spar (already fairly short for such a wingspan) too small. Nothing I can't overcome, but I shouldn't have to...

Bo


quote:

ORIGINAL: captainron

RIP N BANK,
I FIGURED IT OUT,
HANGER 9 SENT OUT ALL THE BAD KITS TO THE GUYS WHO ARE GOOD AT AND WHO DON'T MIND MODIFYING THINGS TO MAKE THEM WORK. THEN, THEY SENT OUT ALL THE GOOD KITS TO GUYS LIKE ME THAT JUST WANT TO BUILD IT FROM THE BOX AND GO FLY EM'.
AFTER READING YOUR LAST POST, I RAN OUT AND CHECKED MY WINGS. JOINED THEM FOR A DRY RUN WITH THE SPAR AND THEY SEEMED TO BE OK. BUT, MAYBE MY TOLERANCES ARE A LITTLE LESS STRINGENT THAN YOURS. WEATHER GETING BETTER IN COLORADO, WON'T BE LONG NOW. EXCEPT FOR WEDNESDAY. SHOULD BE A NICE WEEKEND, GO GLY SOMETHING.

DANG, I LOVE THIS HOBBY. CAPTAIN RON.
quote:

ORIGINAL: Rip n Bank


quote:

ORIGINAL: Jarrah

Bo, looks great, i am reallly impressed with your access hatch. I was actually going to do something similar but i think ill mount all my switches in the cockpit and then hold that on with magnets ifi can find some sutible ones. Hopefully should start mine with the keleo in the next few days.


Thanks, Jarrah. I'm pleased with the way the hatch came out, too!

On a different note: I'm curious if anyone ended up with a "too short, too thin" wing spar. I was going to epoxy the wing together the other night and found that the spar was 3/16" short on each end, (3/8" overall). It wasn't thick, or tall, enough either and really rattled around in the wing receiving pockets.

I don't feel comfortable making up all that empty space in the pockets with epoxy, so I just finished making a replacement hardwood spar that's 3/8" longer, and a hair bigger in thickness and height. I'm sanding it down carefully to a perfect fit that still has space for a good coating of epoxy on all sides.

Much as I love this plane, I have to say that my spar problem, the wing replacement I had to do because they drilled the flap holes too big, and the noticable "undulating" surface of the fuselage and the wing under the ultracoat, that this is the poorest quality H9 plane I've built so far.

That won't stop me from lovin' it when I'm ripping down the runway 10' off the deck, but given the price, I'm a bit disappointed with this one...

Bo









_____________________________

The more planes you have in your "hangar," the less likely your wife will notice a new one!

(in reply to captainron)
       Post #: 302

RE: New Hangar 9 1.50 P-51 Build - 3/4/2007 6:14:38 AM   
WALKERS210-RCU


 

Posts: 294
Joined: 2/20/2002
From: Sipsey, AL, USA
Status: offline 		This build thread has been a God Send. I have had my P51 for about four days now and have setup servos and thats about all. I had a problem trying to use the JR 791's on retracts and a Futaba FP148DF 8ch rx. They just would not work. Took the servos to LHS to test on JR system, worked fine. I changed rx to a 127 7ch rx with 6v pack they worked fine. After reading in this post about the 791's issue with 6v I just tried them on the 148 again with a 4.8 pack, they work ?? The diagram to use a dual pack 4.8 and 6v for retracts seems to be the answer to that problem. Has anyone used the Evo 35cc gasser, I had planned on using an OS BGX-3500 but no place to put an exhast without cutting too much out.
Thanks to all for the great info.

(in reply to solarmusic-RCU)
       Post #: 303

RE: New Hangar 9 1.50 P-51 Build - 3/6/2007 4:00:48 AM   
Rip n Bank


 

Posts: 501
Joined: 3/12/2005
From: Fort Collins, CO, USA
Status: offline 		Hey Gang, getting closer!

Had to make some serious progress on the 'Stang recently to be ready in time for my club's annual RC Show at our mall last weekend. (see pic)

Only thing left to do now is to add the elevator & rudder servos, push-rods and control horns, then get a preliminary CG so I can determine where exactly to mount the receiver and two batteries to trim her to spec w/o adding dead weight.

Still need a pilot, too, but haven't found what I like, yet. Which reminds me, are you guys putting in a 1/5 or a 1/6 pilot? At 80", this H9 P-51 comes out to 1/5.5 scale (right in the middle), assuming a 37' wingspan on the real thing. I'm guessing a 1/6 would be best.

In any case, I'm shooting for her maiden by the end of the month, weather permitting!

Bo


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_____________________________

The more planes you have in your "hangar," the less likely your wife will notice a new one!

(in reply to Rip n Bank)
       Post #: 304

RE: New Hangar 9 1.50 P-51 Build - 3/6/2007 2:53:34 PM   
captainron


 

Posts: 183
Joined: 6/19/2006
From: PUEBLO WEST, CO, USA
Status: offline 		RIP N BANK

BO, SHE LOOKS AWESOME, I'M JEALOUS.

I JUST BOUGHT A NEW 30% EXTRA, STARTED ON IT TO. GONNA GO WITH THE DA50 FOR THE BIZ UP FRONT. I HAVE ALL IDEAS THAT IT WILL BE COMPLETED BEFORE THE STANG.

DANG, I LOVE THIS HOBBY. CAPTAIN RON.

(in reply to Rip n Bank)
       Post #: 305

RE: New Hangar 9 1.50 P-51 Build - 3/6/2007 3:21:51 PM   
Rip n Bank


 

Posts: 501
Joined: 3/12/2005
From: Fort Collins, CO, USA
Status: offline
quote:

ORIGINAL: captainron

RIP N BANK

BO, SHE LOOKS AWESOME, I'M JEALOUS.

I JUST BOUGHT A NEW 30% EXTRA, STARTED ON IT TO. GONNA GO WITH THE DA50 FOR THE BIZ UP FRONT. I HAVE ALL IDEAS THAT IT WILL BE COMPLETED BEFORE THE STANG.

DANG, I LOVE THIS HOBBY. CAPTAIN RON.


Thanks, Ron.

The photo over-exaggerates this (not as bad as it looks), but I am displeased with the match between the H9 "Cub Yellow" I applied to the spinner, and the (supposed) "Cub Yellow" they used on the cowl. I'm going to sand off the spinner's LusterCoat and apply a few more coats of Cub Yellow to see if that "richens" the yellow.

Ahh, looks like the dreaded "Hangar Creep" has struck you! You know, the irresistable temptation to add a new plane to the hangar before you finish the previous one! Well, don't back-burner the 'Stang TOO long!

Bo


_____________________________

The more planes you have in your "hangar," the less likely your wife will notice a new one!

(in reply to captainron)
       Post #: 306

RE: New Hangar 9 1.50 P-51 Build - 3/6/2007 4:14:37 PM   
captainron


 

Posts: 183
Joined: 6/19/2006
From: PUEBLO WEST, CO, USA
Status: offline 		BO,
Didn't even notice the spinner. I just love to look at the gorgeous lines of the legend itself. cool, the way you've got the flaps down for her photo op. I flew the maiden hop on my buddies hanger 9 60 size P-51 (MARIE) sunday. He's a good builder and she flew perfect right out of the box. Man, I hope my big brother flys as well. The first take off was picture purfect if I must say so myself. I had him on the buddy box so he could get some time on her. The first landing was one of my best with a warbird. Mains touched down first followed by the tail wheel. SSSSSSSSSSSSSSooooooooooo PRETTY!!! Please let me know when you plan a test hop on the big stang. I would probably make the drive up from Pueblo just to see it. I"M SERIOUS!!

DANG, I LOVE THIS HOBBY. CAPTAIN RON.

(in reply to Rip n Bank)
       Post #: 307

RE: New Hangar 9 1.50 P-51 Build - 3/6/2007 7:36:49 PM   
Rip n Bank


 

Posts: 501
Joined: 3/12/2005
From: Fort Collins, CO, USA
Status: offline
quote:

ORIGINAL: captainron

BO,
Didn't even notice the spinner. I just love to look at the gorgeous lines of the legend itself. cool, the way you've got the flaps down for her photo op. I flew the maiden hop on my buddies hanger 9 60 size P-51 (MARIE) sunday. He's a good builder and she flew perfect right out of the box. Man, I hope my big brother flys as well. The first take off was picture purfect if I must say so myself. I had him on the buddy box so he could get some time on her. The first landing was one of my best with a warbird. Mains touched down first followed by the tail wheel. SSSSSSSSSSSSSSooooooooooo PRETTY!!! Please let me know when you plan a test hop on the big stang. I would probably make the drive up from Pueblo just to see it. I"M SERIOUS!!

DANG, I LOVE THIS HOBBY. CAPTAIN RON.



Hey, ya gotta display Mustangs with the flaps down. Gives them that "all business" look!

Cool that you got to maiden your friend's 60-size version; mine is a sweet flying machine, too! In fact, it was flying my smaller one that made me decide to add the big one to my hangar.

As to the maiden for my big 'Stang, it'll probably be on a weekday near month's end at LoveAir's airfield, where "Big Bird" and now, I hear, "Warbirds over the Rockies", will occur. As you know, they have a 600 foot paved runway that's ideal for giant scale flights, especially warbird maiden's, with their higher average landing speed. Once I dial her in, and familiarize myself with this 'Stangs characteristics on base and final, under flaps, I'll transition her back to my club's airfield, with it's 250' paved runway.

Wow, that's a LONG drive to come up just to see my bird maiden, man, but you're more than welcome to do so! I'll keep you informed when. Hey, why don't you "back-burner" the new Edge instead, finish your 'Stang, bring it up, and we'll maiden them on the same day up here?

Bo



_____________________________

The more planes you have in your "hangar," the less likely your wife will notice a new one!

(in reply to captainron)
       Post #: 308

RE: New Hangar 9 1.50 P-51 Build - 3/6/2007 7:54:26 PM   
CowboyLifesaver


 

Posts: 411
Joined: 7/7/2005
From: Sun Valley, NV, USA
Status: offline 		Cublover can build you a great 4 blade for that 150 Mustang that will actually work, and look good. That guy is always coming up with something. I know there are 4 blades out there but they are pricey compared to his, and if you ding a blade it's easy to replace.

_____________________________

"What size engine is that???? You''ve got some serious thrill issues." Desert Lakes Fly''n Group Revver #165

(in reply to Rip n Bank)
       Post #: 309

RE: New Hangar 9 1.50 P-51 Build - 3/6/2007 8:21:29 PM   
Oosiksmith


 

Posts: 505
Joined: 9/21/2002
From: Hampton, VA,
Status: offline 		I've been following this thread for some time now and wish there was this much info on the P-51 I'm working on. I'm doing some mods on a CMP P-51 140 ARF and am looking for some info. The air scoop on the CMP plane looks more like a P-51H than a -D model and I was going to make a new one from scratch, but then thought the air scoop for the Hangar 9 P-51 1.50 ARF might be close. Can anyone please provide me with the specs on the scoop; length, width, and height?

http://www.rcuniverse.com/forum/m_5509593/anchors_5509593/mpage_1/key_/anchor/tm.htm#5509593

Thanks,
Tim


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(in reply to CowboyLifesaver)
       Post #: 310

RE: New Hangar 9 1.50 P-51 Build - 3/6/2007 8:22:58 PM   
Oosiksmith


 

Posts: 505
Joined: 9/21/2002
From: Hampton, VA,
Status: offline 		Here are the dimensions of the current scoop:

Width: 6 inches

Height: 3 1/2 inches

Length: 5 inches

Thanks.


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(in reply to Oosiksmith)
       Post #: 311

RE: New Hangar 9 1.50 P-51 Build - 3/7/2007 9:37:42 PM   
reincarnate



Posts: 804
Joined: 10/1/2006
From: Columbia City, IN, USA
Status: offline 		Rip...I was also disappointed with the color match. Paint three coats, sanding between coats, horrible match. Sanded down good, two more coats and clearcoat, still a bit off. I guess it's no worse a match than the bottom cowl was.

Sad day yesterday. The weather was great for the first time in months so I got out the H9 .60 Mustang and headed to the field to shoot some touch and go's. Three perfect shots and hard fourth had me heading in for fuel. Went to turn for final, and halfway through she belly rolled and went in hard on the frozen ground. Just had time to close the throttle. Evidently on the last (hard) touch and go, I loosened the battery connection, because it was the only thing unplugged when I got to the scene. I had used fly line leader to lash the connections together, and it had become brittle. Didn't see it on pre flight. The little Stang is fixable, but I have ordered Sulllivan's connector locks for the rest of the fleet. Check 'em good gents, especially if it's the first flight after a long winter.

(in reply to Rip n Bank)