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P-6E Curtis hawk (build thread)

Old 01-05-2006, 10:29 AM
  #301  
pettit
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Default RE: P-6E Curtis hawk (build thread)

If it's not glued on yet, use a black magic marker on the white plastic at the cut edges of the fin fairing and turtle deck.

It looks better than bright white!
Old 01-05-2006, 10:34 AM
  #302  
samparfitt
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Default RE: P-6E Curtis hawk (build thread)

good idea on the black marker pen: I wish I would have thought of that BEFORE glueing it on.
Maybe I can put some tape down first.
Watching that fantastic bowl game on last night got me distracted: hard for me to do two things at once!
Old 01-05-2006, 11:54 AM
  #303  
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Default RE: P-6E Curtis hawk (build thread)

Hi samparfitt,
What a nice job you have done-both in your build and in the photo documentation! Thank you for the effort! I look forward to reading about your flights. My Hawk is about 1-2 months behind you-I build very slowly!
Best Wishes,
Jim
Old 01-05-2006, 01:57 PM
  #304  
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Default RE: P-6E Curtis hawk (build thread)

Folks, I’d like to provide some expanded comments on the P-6E Hawk for those of you still building or contemplating this bird. To put the below in contact, I have assembled ARF’s from most of the top companies around from the very high dollar giant scale pattern and 3D birds down to the .40 size cheapies. So I think I have a pretty good handle on what you are getting with the Great Planes Hawk.

My Hawk has a brand new engine in her. I was experiencing idle adjustment problems that resulted in several hot landings and two or three deadsticks. I have nearly two dozen flights on the plane with a 25cc gasoline engine.

This plane is one of the most solidly designed, well mannered, fun to fly planes, I have owned. Mine is not light with the gasoline engine and smoke system coming in at 16.2 pounds. But she flies like a butterfly. The design of this plane is extremely well thought out. I have had nothing come loose or break and even with the new gas engine, nothing has vibrated off. On one hot landing I flipped the Hawk over on her back. Absatively no damage to anything. I had a deadstick into about a 10mph headwind and thought I wouldn’t make it back to the field. The Hawk has a long glide slope. If you look at the plane from head-on it has a very slick and streamlined frontal profile for a bipe. The plane has a very wide flight envelop and can handle both slow and high speeds well. It’s hard to explain, but this plane is so comfortable to fly that you can get down low to the deck and bushes and really have fun with her. I was also impressed with the fact inverted flight is a joy. At the recommended CG you can flip her over with no more than a tad of up elevator. Takeoffs and landing are non-vents. Tracks straight on takeoff roll with an effective rudder. I did notice you have to use a little caution in crosswinds. After the first couple of flights I put all control throws on the maximum available and that is were I fly her all the time. I can only hope Top Flight’s new Staggerwing ARF will be based on this planes design and quality.
Old 01-05-2006, 02:29 PM
  #305  
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Default RE: P-6E Curtis hawk (build thread)


ORIGINAL: splais

At the recommended CG you can flip her over with no more than a tad of up elevator.

Is that a metric or conventional Tad?
Old 01-05-2006, 03:16 PM
  #306  
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Default RE: P-6E Curtis hawk (build thread)

Off topic, but please tell me you aren't kidding about a GP "Staggerwing ARF". ONLY my favorite airplane of all time!!!
Al Carr
Old 01-05-2006, 03:28 PM
  #307  
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Default RE: P-6E Curtis hawk (build thread)

I'm only alluding to the advertisemant that Robart has for a set of retracts for the "Top Flite Staggerwing".

They don't offer one.

Yet...
Old 01-05-2006, 05:37 PM
  #308  
splais
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Default RE: P-6E Curtis hawk (build thread)

I have corresponded with Top Flight (Hobby Services). Yes, they are coming out with a giant scale ARF Staggerwing. sometime in the February-March timeframe. There is a thread on it here: http://www.rcuniverse.com/forum/m_36...tm.htm#3621522
Old 01-05-2006, 05:45 PM
  #309  
splais
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Default RE: P-6E Curtis hawk (build thread)

Tad, is a unique unit of measure that has different meaning for different people for me "a tad" is about an 1/8" of stick movement
Old 01-05-2006, 07:07 PM
  #310  
Capt G
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Default RE: P-6E Curtis hawk (build thread)

Finished mine up today. Put the battery on top of the motor box and no additional weight was needed to balance! All up weight is 13.5lbs. Will test fly Sat and hope to have pics.
Old 01-05-2006, 08:32 PM
  #311  
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Default RE: P-6E Curtis hawk (build thread)

Ought to fly great at that weight Capt G. Be sure and post a flight report and pix.
Old 01-05-2006, 10:25 PM
  #312  
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Default RE: P-6E Curtis hawk (build thread)

Build (continued)

Pic 34:
US ARMY decal added.
(hope I got her right!)

Pic 35:
I put brass tubing in the tank to keep any possibilities of the clunk from bending forward.

Pic 36:
The cowl cut for the OS 1.20 4-stroke.

Pic 37:
Four hardwood blocks glued in for the servo tray.
rear view.

Pic 38:
front view.

Pic 39:
Had to grind the ends off the machine guns as they kept the cowl from seating correctly.

Pic 40:
Control horns put on the tail feathers.

Pic 41:
Lots of holes put into the bottom of the pilot to act like rivets when the epoxy is added.
Wanted to put screws in but a screw driver won't fit inside the fuse.

Pic 42:
The battery (for now) goes where weight should be.
Hopefully, no weight will be needed.

Pic 43:
Cockpit with on/off switch, charging jack and voltwatch.


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Old 01-05-2006, 10:57 PM
  #313  
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Default RE: P-6E Curtis hawk (build thread)

Got the First Place Engines 1.3 gasser today. Here it is compared to my test layout-just right!
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Old 01-06-2006, 01:11 AM
  #314  
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Default RE: P-6E Curtis hawk (build thread)

I may have missed them, but I haven't seen any comments on engine cooling for the Hawk. Is the small square opening just below the shaft hole in the cowl sufficient? I'll be using an O.S. 1.20 FS.
Old 01-06-2006, 02:59 AM
  #315  
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Default RE: P-6E Curtis hawk (build thread)

Sounds good,will see you Sat.
Old 01-06-2006, 06:43 AM
  #316  
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Default RE: P-6E Curtis hawk (build thread)

Bring the Avenger?
Old 01-06-2006, 11:14 AM
  #317  
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Default RE: P-6E Curtis hawk (build thread)

Hi,
Well done! Since I am trailing your progress, I will sure look forward to your upgrade posts!
Jim
Old 01-06-2006, 05:28 PM
  #318  
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Default RE: P-6E Curtis hawk (build thread)

Hi,
Well, I find that with the cowling snug against the fuse as it should be, I measure some 5 7/8 in. from the engine mounting bulkhead to the outside edge of the prop shaft exit on the cowling. For me, it means that I will add aabout a one in. thick ( or so) ply spacer if the FP 1.3 is indeed 5 in. from back to front. Have I missed something?
Regards,
Jim
Old 01-06-2006, 05:35 PM
  #319  
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Default RE: P-6E Curtis hawk (build thread)

Has anyone installed a 91 four stroke--Saito--or OS in the Hawk? This is my preference for various reasons. Don't care if I need weight up front for balance. I am an experienced builder and pilot and am not after speed or vertical performance. Just reasonable scale like speed and performance

JW
Old 01-06-2006, 05:45 PM
  #320  
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Default RE: P-6E Curtis hawk (build thread)

Damn.....I've spent the last two years scratch building a 1/3 scale Curtis Hawk P6E (partly because you hardly ever see them...), now I have to see a bunch of cookie cutter clones everywhere.....why did it have to be great planes???? all of there stuff flies great! Why couldnt it be a company who makes crap come out with this beautiful airplane??
Well, at least mine will be bigger.
Old 01-06-2006, 05:55 PM
  #321  
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Default RE: P-6E Curtis hawk (build thread)

ORIGINAL: pahtreek

Damn.....I've spent the last two years scratch building a 1/3 scale Curtis Hawk P6E (partly because you hardly ever see them...), now I have to see a bunch of cookie cutter clones everywhere.....why did it have to be great planes???? all of there stuff flies great! Why couldnt it be a company who makes crap come out with this beautiful airplane??
Well, at least mine will be bigger.
I feel your comments are misguided. I for one LOVE the fact that this is in ARF form becuase I would never get around to building one from a kit. ARF's provide a means for us that dont have the time skill or want to build from Kits. We can go on all day about things not being scale etc but this isnt built to win Scale competitions.

matt
Old 01-06-2006, 06:13 PM
  #322  
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Default RE: P-6E Curtis hawk (build thread)

I was just making a tounge in cheek comment. Sorry if anyone is taking it too seriously. I have nothing against arfs (other than I have no pride in the one that I own). Who would want to build from a kit when 99.9% of us out there end up building them twice as heavy as arfs. It's hard to beat the quality of a guy in china making .20 cents an hour. (that's another joke......)
Old 01-06-2006, 06:31 PM
  #323  
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Default RE: P-6E Curtis hawk (build thread)

Build (continued)

Pic 44:
I added the CG before putting the wing on (2 black lines). 5 7/8" back from LE.

Pic 45:
No worry on the landing gear cover coming off without gluing it (the wheel pants hold it on!).

Pic 46:
My first 'mod'.
I put the throttle servo up front.

Pic 47:
top view.

Pic 48:
Second 'mod'.
One of my clubs don't allow screwed on fasteners for control rods,
so I put two servos in for the elevator.
This is a real easy mod.
I put the rudder servo where the throttle servo was suppose to be (left side).
The center and right servos are for the elevators.
I had to cut a thin slice in the former to move the right gray tube to the right about a 1/2"
and used a piece of scrap ply to hold the gray tubing in place.
Two servos for the elevator is a good safety item anyway: I can fly her a lot better with half an elevator versus none
should one of the servos go bad.
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Old 01-06-2006, 07:44 PM
  #324  
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Default RE: P-6E Curtis hawk (build thread)


ORIGINAL: hookemut

For me, it means that I will add about a one in. thick ( or so) ply spacer if the FP 1.3 is indeed 5 in. from back to front. Have I missed something?
Regards,
Jim
Nope, I've ordered 1" long 1/2" diameter aluminum standoffs with a #8 clearance hole to use as spacers, and a bag of 8-32 x 2" socket head screws from McMaster-Carr. You can use the 8-32 blind nuts from the kit. I'm waiting for a Graupner 15x8 3-bladed prop before I test run the engine. Will be interesting to see if it can handle a Master Airscrew 16x8 3-blade, it has narrower blades than the Graupner.
Old 01-06-2006, 07:48 PM
  #325  
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Default RE: P-6E Curtis hawk (build thread)


ORIGINAL: samparfitt

Build (continued)

I added the CG before putting the wing on (2 black lines). 5 7/8" back from LE.
How far back from the firewall (not the engine mount) would that make the proper CG?


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