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3DHobbyShop 55" Extra 300 SHP build and review

Old 09-23-2007, 02:27 AM
  #1  
Mike Parsons
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Default 3DHobbyShop 55" Extra 300 SHP build and review

I am reviewing this plane for RCU. I have always been a big fan of 3Dhobbyshops products as well
as the owner as he is top notch. He has teamed up with Scott Stoops
to form a SHP (Super High performance)
line of aircraft. These two have done an incredible job.
Ok..enough of my babbling..on to the build:

Specifications:
Extra 300 SHP
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  • Wing Span: 55 inches
  • Overall Length: 56 inches
  • Wing Area: 640 sq. inches
  • Flying Weight: 4.5-5.5 lbs
As Equipped:Assembly:
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Old 09-23-2007, 03:56 PM
  #2  
rcers
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I hate to taint your review - but you are going to love it.....

James has been playing with his a while now here....



Mike
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Old 09-24-2007, 04:25 PM
  #3  
Mike Parsons
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Originally Posted by rcers View Post
I hate to taint your review - but you are going to love it.....

James has been playing with his a while now here....



Mike
Not tained at all. I was trying to beat the review going live at RCU, but I failed miserably . I figured I'll do a build review here for those that dont visit RCU.
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Old 09-24-2007, 04:30 PM
  #4  
FlyingMonkey
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3D is for monster movies!!!

Oh, and those with much more skill than I...

Looking forward to the review.
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Old 09-24-2007, 04:30 PM
  #5  
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Click the photos for larger view and captions.

Covering removed in all the right places
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Stab in place and squared up
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To ensure it is at 90 degrees, a string and tape is used to compare the LE on each side
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Once the stab is marked, the covering is removed 1/8th of an inch inside each mark. Then the remaining covering is ironed down to avoid curling upon installation.
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The split elevator halves are installed.
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Enough throw? Uhh..yeah
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Old 09-24-2007, 04:37 PM
  #6  
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There is a pull string installed that assists in installing the aileron servo leads. Nice touch.
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Another view of it being used
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Phenolic Control horns are supplied with the kit.
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The aileron servo is installed and hooked up. Notice that 3DHS supplied ball links for the control horn side of the install. Another nice touch.
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One half of the Elevator installed.
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The Rudder uses a Pull Pull setup. I much prefer this over a push-pull. It provides more positive response.
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Another view of the rudder install. Double tress phenolic control horn with the ball link setup.
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Old 09-24-2007, 04:46 PM
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The landing gear is held on with two Hex Bolts. The gear is nicely painted to match the silver covering. It is also a Single piece.
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The wheelpants are probably the easiest I have ever installed. The molded in recess for the landing gear assists in that greatly.
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The Tailwheel is top notch. I love how it mounts to the fuse and uses a steering wire instead of L mounting into the rudder. This keeps the stress of of the rudder and allows the fuse to absorb the shock of landing
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The Cowl is installed with four wood screws. Standard installation here and no suprises.
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Old 09-24-2007, 04:55 PM
  #8  
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Torque Revolution 4014. A great power house. Has been tested to 1500 watts. Amazing for a 280g motor.
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Another view with included hardware
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Airboss 80 amp esc. This controller can be run up to 5 servos and 5S without the need of an external BEC. It has a switching BEC built in. If you plan on running all digitals I would recommend using an external BEC. It has been tested and has proven to work, but I err on the side of caution
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Maxamps 5S 4ah pack. I have been quite impressed with the performance out of this battery.
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The motor mounts with the included stand offs and blind nuts. The holes do need to be drilled to mount. This allows anyone to use whatever motor they choose.
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A completed power installation
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This is my first experience with XOAR props. I was so impressed with the performance I am ordering more for a couple of my other planes.
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Old 09-24-2007, 04:58 PM
  #9  
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The first flight was for trimming the aircraft and went quite well. I found that I actually had the CG a bit too far forward for my taste and it resulted in a nose heavy condition. After a few circuits and passes, I setup for a landing. The battery was moved around about an inch off of the rear of the battery tray. This seemed to make it neutral in all axis and the presence of any pitch sensitivity was not detected.
The second flight I decided to let it all hang out. I have to admit, the first tumble increased the pucker factor of flying any new plane ten fold. I have never had a plane that would fall over its axis with so much intensity. It was intimidating at first. However, after a few high speed aneurysms, the plane seemed to just float after the momentum wore off and my anxiety faded. Walls were excellent and popped just right without loosing altitude. I also found that hovering was easy enough while managing the control surfaces and a variation of throttle to maintain a nose high condition and providing enough air over the surfaces for maximum control.
Harrier Rolls are quite nice, but I found it easier to do it on low rates as the control surfaces are so effective I found it hard to keep up. I put the ailerons on low rates and left elevator and rudder at a hundred percent and found it to be much easier.
Harriers as well are easily accomplished. With little breeze the elevators could be deflected fully and then it was only a matter of using rudder to steer it around. With the generous wing area, managing between 50% and 100% elevator deflection was necessary in a breeze.
Knife edge flight has almost no coupling and for me required no mixes. I manually corrected the ever so slight pull to the gear to maintain the straight line. Even in a high alpha slow knife edge, it didn't want to couple out.
After moving the battery back the flat spins seemed to settle in, however I could never get it truly flat, but I am working on that.
Have I mentioned the tumbles? Yes? Well let me say again.. this plane is amazing at tumbling. It is a show stopper with the violence it enters and exits a tumble. Waterfalls are amazing and it just keeps asking for more.
IMAC maneuvers are not a problem either. With the rates on low, the Extra 300 tracks very nicely and four point rolls stop when the controls are neutralized. The same applies for up line snaps as well as knife edge to knife edge snaps. It has immediate control response and allows the pilot to easily stay ahead of the plane.
I am putting roughly 8-10 minutes on the Maxamps 4000 packs. Even with as much 3D as I am doing everything comes down cool from the power system to the battery. It is a well matched system. The Xoar props that are also carried and recommended by Ben at 3Dhobbyshop are a great addition as well. There is very little resonance in snaps and high torque maneuvers. Another step in making electrics quieter.

Video:


[if]http://www.rcuniverse.com/magazine/article_display.cfm?article_id=926[/if]
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Old 09-24-2007, 05:25 PM
  #10  
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Nice Mike, My father just got the 47" one, it flys nice I want this one but not sure about power system as now were only using A123 cells in the bigger planes.
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Old 09-24-2007, 06:18 PM
  #11  
Mike Parsons
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Thanks Chris. A123's would do fine in this plane as it is large enough to carry the little bit of extra weight I would think.
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Old 09-24-2007, 06:25 PM
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Originally Posted by Mike Parsons View Post
Thanks Chris. A123's would do fine in this plane as it is large enough to carry the little bit of extra weight I would think.
Well he flys the 47" one on a 4 cell, and it flys great, I can 3D it really nicely.Btw, I sent you a Pm on Rcgroups bout a week or so ago and never heard from you.
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Old 09-24-2007, 07:06 PM
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Mike Parsons
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Originally Posted by Foamiesrfun View Post
Well he flys the 47" one on a 4 cell, and it flys great, I can 3D it really nicely.Btw, I sent you a Pm on Rcgroups bout a week or so ago and never heard from you.
I got it (the one about the showtime) and sent you one back. Ill resend.
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