RE: TF 1/5 Scale P-51 ARF Assembly Thread  
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RE: TF 1/5 Scale P-51 ARF Assembly Thread - 10/18/2003 11:47:01 PM   
Shrky



Posts: 101
Joined: 9/22/2003
From: Vancouver, WA, USA
Status: offline 		For ailerons you don't need a progamable channel just to get a greater up travel then down (or vice versa) Instead of setting the arm perpendicular to the servo body when the servo is centered, move the arm 2 or 3 teeth in the direction of travel that you want the lesser throw. This will give you more throw one direction than the other and you can just adjust the end points on the one channel to get at least very close to the recommended throws.

Scott

_____________________________

Never run out of airspeed, altitude and ideas all at the same time.

(in reply to splais)
       Post #: 151

RE: TF 1/5 Scale P-51 ARF Assembly Thread - 10/19/2003 12:39:59 AM   
splais


 

Posts: 2711
Joined: 12/12/2001
From: Yuma, AZ, USA
Status: offline 		Well, I ran the DA50 today. All I got to say is sweeeeet. First start had to flip it about 20 times to get fuel into everything. when it started, it just purred. Let it cool down and started it a second time. First flip. This thing was set at the factory recommended start settings. I swear I could have just taxid out in the street and taken off and it would have run just fine. Has a nice deep growl with the Slimline muffler that sounds pretty good.

Only problem is I have found that you need every single screwed or bolted anything lock tited. A lot of overall vibration. had the lock nut on the air valve and a BB Adjuster on the flaps come loose. I have lock tited everything now.

Oh, yeah. Remember that canopy. Well it blew completely off after about 5 minutes. Popped right off, pulled out all 8 screws. RC56ing tonight. Like I said earlier. the canopy install instructions are unsat.

I have given up on tailwheel doors. they will never work correctly. The tailwheel already pulled one loose. I painted the inside of the tailwheel well Zinc Chromate. Going to remove the doors completely I think.

This bird is going to fly next Saturday for sure.

(in reply to splais)
       Post #: 152

RE: TF 1/5 Scale P-51 ARF Assembly Thread - 10/19/2003 3:22:39 AM   
pittsdriver



Posts: 820
Joined: 2/25/2002
From: Twin Falls, ID, USA
Status: offline 		Guys, If you want the Robart retracts Chief Hobbies sells them for $209 and he will have them Monday or Teusday. Also has the tailwheel for $106 and the Mustang is $429 shipped. I have dealt with these guys a lot full and RC scale and they are first class. Don

(in reply to splais)
       Post #: 153

RE: TF 1/5 Scale P-51 ARF Assembly Thread - 10/19/2003 7:07:54 AM   
pittsdriver



Posts: 820
Joined: 2/25/2002
From: Twin Falls, ID, USA
Status: offline 		Scott, Here is a picture of the setup on my Master Scale Mustang kit. I built one of these 20 years ago and this setup worked great. Don

Attachments
Click to see fullsize image.
Click for fullsize 		Click to see fullsize image.
Click for fullsize

(in reply to pittsdriver)
       Post #: 154

RE: TF 1/5 Scale P-51 ARF Assembly Thread - 10/19/2003 11:58:59 PM   
splais


 

Posts: 2711
Joined: 12/12/2001
From: Yuma, AZ, USA
Status: offline 		Well I'm getting tired of posting here and writing on my review, but a few almost final comments are required.

I have had to trash the Hughes Fuel Juel. Just doesn't work worth a darn. It leaks badly because it works on a loose fitting tube being shoved down the fuel line. I could not come up with a combination of tube and hose that prevented it from leaking - so scratch another product that looks good but doesn't work.

I have also determined that the Robart pressure indicator is a waste of money. It is not near precise enough. Just get a good tire gauge and use that. I have found that my retract system works fine until the pressure gets down to 28-30 pounds, then the gear may not go all the way up. However, it looks like with a starting pressure of 80# I can get about five cycles. So no problem there at all.

The biggie, I haven't commented on - CG. Did my first checks this weekend. The plane is a little nose heavy, but not much. I think I can get her balanced right on this week without adding any weight.

I have solved my programming problem with a minimum of hazzle. I'm going to use a Futaba SR-10 Servo Reverse and run a Y on the elevators.

(in reply to splais)
       Post #: 155

RE: TF 1/5 Scale P-51 ARF Assembly Thread - 10/20/2003 3:04:11 AM   
AirBearMA



Posts: 225
Joined: 3/18/2003
From: North Attleboro, MA, USA
Status: offline 		Check with your LHS to see if they have a Servo Programmer that you can reverse a Hitech digital servo with. Many of them will gladly let you use one to do this. It is definitely less expensive than using a matchbox.

_____________________________

AirBearMA
The bear in the air.....

(in reply to splais)
       Post #: 156

RE: TF 1/5 Scale P-51 ARF Assembly Thread - 10/20/2003 5:16:37 AM   
splais


 

Posts: 2711
Joined: 12/12/2001
From: Yuma, AZ, USA
Status: offline 		It would be if I had a local hobby shop, but the nearest is 200 miles. The Hitec programmer is about $160.00. the Futaba servo reverse is $40. Not much of a decision to make there.

PS: I found a servo reversing Y that only cost $18.

< Message edited by splais -- 10/20/2003 11:38:17 AM >

(in reply to splais)
       Post #: 157

RE: TF 1/5 Scale P-51 ARF Assembly Thread - 10/20/2003 7:11:48 AM   
Rutlec80


 

Posts: 49
Joined: 6/17/2003
From: Montpelier, OH, USA
Status: offline 		BVM is selling small pressure gauges. Mounted mine about 1 inch below the rear deck behind the pilot. You have to look straight down to see it.

(in reply to Shrky)
       Post #: 158

RE: TF 1/5 Scale P-51 ARF Assembly Thread - 10/20/2003 3:46:21 PM   
pittsdriver



Posts: 820
Joined: 2/25/2002
From: Twin Falls, ID, USA
Status: offline 		I have a portable battery-compressor that has a pressure guage built in. All an onboard guage does is add weight and two more potential leak spots. KISS is almost always the best way to go. Don

(in reply to splais)
       Post #: 159

RE: TF 1/5 Scale P-51 ARF Assembly Thread - 10/20/2003 4:34:59 PM   
gary9648


 

Posts: 1175
Joined: 10/22/2002
From: Troy, OH, USA
Status: offline 		Splas, crank up that air pressure! I always put 100# of pressure in my tank to start out. You should get many cycles with that much pressure. Also, if your plane is slightly nose heavy, I would fly it there first then move it back. This means that the plane balances slightly nose down at the recommended CG. My TF Corsair is very squirrlely at the recommended CG. One fellow did a revue of the Corsair in High Flight and had the same problem. He moved the CG about a quarter of an inch forward and really calmed it down. I did the same. You do not want it to nose heavy because it will nose over easily.
Can't wit to hear about your first flight!

(in reply to splais)
       Post #: 160

RE: TF 1/5 Scale P-51 ARF Assembly Thread - 10/20/2003 6:42:36 PM   
splais


 

Posts: 2711
Joined: 12/12/2001
From: Yuma, AZ, USA
Status: offline 		Pittsdriver. you are right and I am removing the gauge. my little 12v tire pump also has a gauge on it.

[Note: I have posted my almost complete review in the "User Product Reviews" forum. it is under my moms sign-in, bhunn3; don't ask. I'll have pictures added hopefully, tonight.]

(in reply to splais)
       Post #: 161

RE: TF 1/5 Scale P-51 ARF Assembly Thread - 10/20/2003 7:03:34 PM   
MustangFan



Posts: 586
Joined: 3/25/2003
From: Canton, MI, USA
Status: offline 		Splais

I viewed you frustration concerning trying to get your P-51 in the air and all the delays.

At least you don't have the delay encountered in our area .... that is WINTER.

I'll have to wait until May or June before I can do ANYTHING productive.

Enjoy flying ... I'm in the building season.

By the Way ... Nice going ... hope you enjoy a P-51 ... I know I will next year.

_____________________________

Thats Just My Opinion - I Could Be Wrong ( Dennis Miller )

(in reply to Shrky)
       Post #: 162

RE: TF 1/5 Scale P-51 ARF Assembly Thread - 10/20/2003 7:20:57 PM   
BHunn3


 

Posts: 61
Joined: 3/7/2003
From: Orosi, CA, USA
Status: offline 		I thought that was what frozen lakes or skids are for. What are you waiting for. Get going.

(in reply to splais)
       Post #: 163

RE: TF 1/5 Scale P-51 ARF Assembly Thread - 10/20/2003 7:35:57 PM   
MustangFan



Posts: 586
Joined: 3/25/2003
From: Canton, MI, USA
Status: offline 		My hands and feet get too cold. Plus my radio probable won't work in the cold. ( too Frail ???)
Not to mention our flying field doesn't have a lake, and I hate shoveling snow.

But I will be building my P-51 while its cold.

_____________________________

Thats Just My Opinion - I Could Be Wrong ( Dennis Miller )

(in reply to Shrky)
       Post #: 164