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Old Jan 31, 2005, 09:21 PM
The Prop Rotates Around $
iflyprops's Avatar
Orlando Herndon, Florida
Joined Oct 2004
693 Posts
Yippee!
Ron Daniels Hawker Sea Fury SHE FLIES

Ron Daniels Hawker Sea Fury

http://www.rwdrc.com/

Well, here we go! I just recieved my Sea Fury kit from EAM.net. I opened the box up and was very suprised at the lasercutting. It is probobly the best I have seen. Hopefully I will do this beautiful kit justice. I have an Axi 2820-10 and a pheonix 45 on order to power the beast and plan on putting retracts in, the question is what kind. I'll post my progress with pictures, but don't expect an overnight build, I'm a college student!!!

Specifications: (from Ron's site)

Span: 42.5" (1079.5 mm)
Wing Area: 326 sq. in. (21.03 dm 2)
Weight: 2 1/4 - 3 1/2 lbs (1021-1589 g)
Power: .20-32 2-stroke glow
.26-.30 4-stroke glow
035-05 geared electric

-Adam
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Old Feb 01, 2005, 06:45 AM
4th Generation
ShaverR6's Avatar
Canada, MB, Winnipeg
Joined Sep 2004
326 Posts
You will find that it builds up very quickly. I just hope you dont mind sand paper. Good luck, I'll try to get some pics of mine up soon.
Patrick
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Old Feb 01, 2005, 07:53 AM
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Quote:
Originally Posted by iflyprops
Ron Daniels Hawker Sea Fury

http://www.rwdrc.com/

Well, here we go! I just recieved my Sea Fury kit from EAM.net. I opened the box up and was very suprised at the lasercutting. It is probobly the best I have seen. Hopefully I will do this beautiful kit justice. I have an Axi 2820-10 and a pheonix 45 on order to power the beast and plan on putting retracts in, the question is what kind. I'll post my progress with pictures as I progress, but don't expect an overnight build, I'm a college student!!!

Specifications:

Span: 42.5" (1079.5 mm)
Wing Area: 326 sq. in. (21.03 dm 2)
Weight: 2 1/4 - 3 1/2 lbs (1021-1589 g)
Power: .20-32 2-stroke glow
.26-.30 4-stroke glow
035-05 geared electric

-Adam

Adam,

This will be a rather fast model.....

Wing Loading calculation:

Wing Loading = Weight / Wing Area

Where... Area = sq.-in. / 144 & Weight in oz.

therefore, let say it comes out to exactly 3 lbs. full flight ready.

Wing loading = 48 oz. / ( 326 / 144) = 21.2 oz. / sq.-in.
-------------------------------------------------------------------
Stall Speed is calculated as:

Stall Speed = 3.7 X Square Root (Wing Loading)
= 3.7 X [(21.2)X(1 X exp .5)] = 10.6 MPH <---Correction: 17 MPH
Recommend a minimum of 45 MPH of pitch speed!

--------------------------------------------------------------------

Carlos
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Old Feb 01, 2005, 08:40 AM
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Ron Daniels's Avatar
Kitchener, Ontario, Canada
Joined Jan 2001
1,176 Posts
Carlos,

You are right that the Sea Fury is a fast model. However, it is MUCH faster than your calculations would indicate.

I would visually estimate the landing speed of mine (56 ounce, 12 cell beastie) at about 17 MPH. The wings are nearly fully symmetrical in airfoil. They have a very wide stall envelope to allow lots of warning of an impending stall. I optimized them for stall characteristics, rather than stall speed.

As for pitch speed, I recommend a minimum of 60 MPH for a "flat out" pitch speed. My Tempests use either an 8 1/2 pitch at 7200-8300 RPM (8300 is brushless, 7200 is a very old 05G), a 5" pitch at 16,500, or an 8" ptich at 9400. My12 cell Sea Fury uses a 10 x 8 M/A electric (undercambered) at 10000 RPM.

The 12 cell plane is both very fast and very powerful, with a near vertical climb. I would not be surprized if it pushes the 100 MPH mark in a moderate dive.

If you use the recommended AXI set-up with the recommended 11 x 8 1/2" prop and 10 A-sized high current cells, you will have about a 60 sustained climb, as well about a 70-75 MPH top speed. Flights will last about 8 minutes (when you can loop at anything over 1/2 power, there is no need to fly flat out all flight). Landing will happen at about 15 MPH.

Once they are used to the launch and flying characteristics, some of my customers switch use an 11 x 10 to get a bit more top speed, at the expense of a tiny bit of climb.

BTW Carlos, do you speak Tagalog? Guapo is a word often used on my son by our Tagalog-speaking relatives.




Ron Daniels
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Old Feb 01, 2005, 09:11 AM
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Yes, the higher the total flight weight the higher the stall speed.....therefore, the 17 MPH is about right since we are talking about 56 oz. versus 48 oz. an almost 10 oz. difference.

For 56 oz. total flight ready weight, Stall Speed is 18.4 MPH

Adam, will aim, hopefully for the lightest wing loading possible such that he can slow her down as much as possible thereby increasing the places he can fly her.

Nope I don't speak the language....sorry....Spanish, Italian, or American English.

Carlos
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Old Feb 01, 2005, 10:20 AM
The Prop Rotates Around $
iflyprops's Avatar
Orlando Herndon, Florida
Joined Oct 2004
693 Posts
Quote:
Originally Posted by guapoman2000
Adam,

This will be a rather fast model.....

Carlos

Thanks for the calculations Carlos. Its supposed to be fast, its a Sea Fury .

I just finished framing the cowl up and putting the first of two layers of two sheeting on it. I'll get some pictures up later today, nothing too exciting yet.

I forgot to mention as well, I have an Axi 2820-10 and a Pheonix 45 on order from Stephens Aeromodel...

I need to order some retracts before I can touch the wing...and I am waiting for some other small stuff, before I start on the major sub-assemblies. Picking up my building board and some other small stuff when I go home this weekend (just north of Jacksonville...) to work for a former boss during the Superbowl...

-Adam
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Old Feb 01, 2005, 11:34 AM
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Quote:
Originally Posted by Ron Daniels
Carlos,

You are right that the Sea Fury is a fast model. However, it is MUCH faster than your calculations would indicate.

I would visually estimate the landing speed of mine (56 ounce, 12 cell beastie) at about 17 MPH. The wings are nearly fully symmetrical in airfoil. They have a very wide stall envelope to allow lots of warning of an impending stall. I optimized them for stall characteristics, rather than stall speed.

The 12 cell plane is both very fast and very powerful, with a near vertical climb. I would not be surprized if it pushes the 100 MPH mark in a moderate dive.

If you use the recommended AXI set-up with the recommended 11 x 8 1/2" prop and 10 A-sized high current cells, you will have about a 60 sustained climb, as well about a 70-75 MPH top speed. Flights will last about 8 minutes (when you can loop at anything over 1/2 power, there is no need to fly flat out all flight). Landing will happen at about 15 MPH.

Ron Daniels
Ron,

Thanks for the additional insight on these wonderful models! This is what I call warbird fun!

I calculated the 11 X 10 "E" APC Prop with the recommended AXI 2820/10 and 10 cell, Sanyo 4/5A FAUP 1950's and wow!

Just curious, what batteries type/size do you recommend?

Carlos
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Old Feb 01, 2005, 12:00 PM
The Prop Rotates Around $
iflyprops's Avatar
Orlando Herndon, Florida
Joined Oct 2004
693 Posts
Here are a few photos of the cowl, 'nearing' completion. The cowl has two layers of 1/16" balsa sheeting, the first photo is of me putting on the second layer, and they others are with the sheeting completed and the cowl ring installed prior to shaping/sanding it.

-Adam
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Old Feb 01, 2005, 01:07 PM
The Prop Rotates Around $
iflyprops's Avatar
Orlando Herndon, Florida
Joined Oct 2004
693 Posts
Here's a few more. After a little more than an hour of sanding the cowl ring is basically done, except for final sanding/smoothing. One thing I would do differently, given the chance, is to use wood glue on the cowl rings. It is tough enough shaping the ring much less fighting with the harder CA...

-Adam
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Old Feb 01, 2005, 02:18 PM
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Super!

Reminds me of those days when Earl (Real McCoy) built his Ryan Bearcat!

Carlos
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Old Feb 01, 2005, 05:30 PM
4th Generation
ShaverR6's Avatar
Canada, MB, Winnipeg
Joined Sep 2004
326 Posts
In order to get a more scale cowl outline on my Fury I added balsa inside the cowl on the rear of the front ply ring. This allowed me to sand through some of the 1/16" sheeting and continue the contour further without reducing strength. I will get in gear to post some pictures.
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Old Feb 01, 2005, 05:40 PM
Fly it like you stole it..
Tram's Avatar
Florence, Al
Joined Oct 2000
29,212 Posts
Looking good.. I've been eyeing one of these, along with the chippy, to turn into a Critical Mass..
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Old Feb 01, 2005, 05:44 PM
The Prop Rotates Around $
iflyprops's Avatar
Orlando Herndon, Florida
Joined Oct 2004
693 Posts
Quote:
Originally Posted by Tram
Looking good.. I've been eyeing one of these, along with the chippy, to turn into a Critical Mass..
So far its a great kit, have nothing but great things to say about it! (except I wish it had a vacuformed/fiberglass cowl )

I think I am going to order some retracts this week so I can get going on the wing soon... I also joined the two elevator halves today as well as some other very minor things.

-Adam


Here are a few pics of the elevator joiner rod...
Pretty much self explanitory, its a squared off "U" that goes into the elevator halves and is epoxied in.
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Old Feb 01, 2005, 05:46 PM
Fly it like you stole it..
Tram's Avatar
Florence, Al
Joined Oct 2000
29,212 Posts
Sweet.. I can't wait to see how it turns out.
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Old Feb 01, 2005, 08:10 PM
H2OFLY
Portland Oregon USA
Joined Feb 2000
2,509 Posts
Good on you! Love the airplane. Have an English kit that I blew the plans up to 125% and thus have a 55 inch wing...but ran out of energy after building the fuselage.

Wish I knew someone who would/could cut a 55 inch span wing out of foam

Terry
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