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Hangar 9 F22 Raptor Glow-To-Electric Conversion

Old 10-19-2015, 05:56 PM
  #51  
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Originally Posted by fhhuber View Post
What I meant about "not worth it" is the complex system needed for multi-stage Fowler flaps and retractable leading edge slats. That gets heavy fast.

Oh, I understand......

Yeap, I will use no Slats anyway.
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Old 10-20-2015, 10:36 AM
  #52  
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Default Totally Finished and Flight Ready!

Got her done last night with the installation of the APC 11 X 7 "E" propeller and test running it up and found that the RED spinner just was not good enough (Balanced). So, a BLACK spinner that had better balance was installed and doing great.

Additionally, it was the first time that the wing servos (Ailerons & Flaps) were activated and the only item was the Left Aileron that required mechanical linkage adjustment and now all systems are a GO!:popcorn:





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Old 10-20-2015, 12:44 PM
  #53  
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Guys,

I am just hanging and waiting for good weather conditions for Central Florida.

Hopefully, by Sunday morning it will be good low wind conditions as I like as little cross wind conditions for this model. I have been reading up the FUEL section discussing this model that seems like there seems to be some sort of ugly reactions to cross wind. Or......perhaps lacking pilot skills from those reporting? In any case I will err on the conservative.

No wine before its time....

Here is the present forecast....

http://www.usairnet.com/cgi-bin/laun...=KTTS&state=FL
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Old 10-20-2015, 06:36 PM
  #54  
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So as it happens, a Scott Todd have replied over at RCGroups and reminded me that this model was designed for training and that I should not see any bad habits from it.

Really nice that someone who owes this model came over to chime in with his personal experience on this F22 Raptor!

Last edited by guapoman2000; 10-21-2015 at 12:40 PM.
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Old 10-20-2015, 09:50 PM
  #55  
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Well... it has bad habits when not in full trainer configuration.

The add-on "wing droops", flaps and forward CG cure the worst of it.

But in advanced configuration (flaps up), especially with best flight performance CG it can have a wicked snap into a spin when it stalls.

It can also be interesting about wanting to act like a pogo stick on landing, regardless of configuration. Ensure the mains touch first and slowly add elevator to keep that nose-wheel off the ground as long as you can.
That is why the plane had a tendency for the nose to break off and needed the reinforcement... it bounces like a rubber ball.
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Old 10-20-2015, 10:21 PM
  #56  
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Originally Posted by fhhuber View Post
Well... it has bad habits when not in full trainer configuration.

The add-on "wing droops", flaps and forward CG cure the worst of it.

But in advanced configuration (flaps up), especially with best flight performance CG it can have a wicked snap into a spin when it stalls.

It can also be interesting about wanting to act like a pogo stick on landing, regardless of configuration. Ensure the mains touch first and slowly add elevator to keep that nose-wheel off the ground as long as you can.
That is why the plane had a tendency for the nose to break off and needed the reinforcement... it bounces like a rubber ball.
Interesting!

Perhaps if I change out the nose wheel tire to a foam material it may reduce the bounce?
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Old 10-20-2015, 11:02 PM
  #57  
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Nope... Maybe if you put on a spring action trailing link....

http://www.altecare.com/struts.htm

Note... this particular one in the link is EXPENSIVE

I have 2 from trike gear retract sets that was $30 and the trailing link handled the nose-wheel of my 14 lb EDF model that had a calculated 40 mph stall speed and would be ideal for your model. (Clip the nose-wheel strut and the trailing link installs with a set screw)
I still use a full set of the retracts on my Dynam Me-262
But they are discontinued...

I'll look some more for something more appropriate that is still available.
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Old 10-20-2015, 11:05 PM
  #58  
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http://www.hobbyking.com/hobbyking/s...ting_Pin_.html

Found the exact trailing link that was on the nose-gear of the electric retract set
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Old 10-21-2015, 04:38 AM
  #59  
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fhhuber,

Thanks so much! You are indeed a Super Contributor!

I just ordered one!

Awesome!
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Old 10-21-2015, 11:36 AM
  #60  
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Originally Posted by fhhuber View Post
Well... it has bad habits when not in full trainer configuration.

The add-on "wing droops", flaps and forward CG cure the worst of it.

But in advanced configuration (flaps up), especially with best flight performance CG it can have a wicked snap into a spin when it stalls.

It can also be interesting about wanting to act like a pogo stick on landing, regardless of configuration. Ensure the mains touch first and slowly add elevator to keep that nose-wheel off the ground as long as you can.
That is why the plane had a tendency for the nose to break off and needed the reinforcement... it bounces like a rubber ball.
fhhuber,

Just attaching what Scott Todd posted at the "Other" RC thread Site and who converted his model to Electric.

I am getting two versions here and will Err on the conservative when I get to fly mine.

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Old 10-21-2015, 01:53 PM
  #61  
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"If you can fly a corsair, a Pitts and know how to use the rudder..."

Corsairs and Pitts specials are anything but trainers and beginners rarely touch the rudder except to taxi.

I've had people say "Its like a trainer" about a lot of things that wouldn't really be appropriate as trainers.

Take it high and do some stalls with and without flaps.
Very high without flaps...
Pay attention to keeping the nose-wheel up when landing.
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Old 10-21-2015, 03:34 PM
  #62  
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Default Thank you!

Originally Posted by fhhuber View Post
"If you can fly a corsair, a Pitts and know how to use the rudder..."

Corsairs and Pitts specials are anything but trainers and beginners rarely touch the rudder except to taxi.

I've had people say "Its like a trainer" about a lot of things that wouldn't really be appropriate as trainers.

Take it high and do some stalls with and without flaps.
Very high without flaps...
Pay attention to keeping the nose-wheel up when landing
.
fhhuber,

Rock Solid Recommendations!

Ha! The first couple of sentences remind me of..........



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Old 10-21-2015, 03:49 PM
  #63  
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But... I never had the hat or goggles...
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Old 10-23-2015, 09:33 AM
  #64  
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Default Sunday morning is the Ticket!

Guys,

Finally! Seems like Sunday early in the morning will be ideal to maiden my Hangar9 F22 Raptor conversion.

http://www.usairnet.com/cgi-bin/laun...=KTTS&state=FL

Will be there at the RC Club field early and ready!
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Old 10-25-2015, 06:04 AM
  #65  
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Default The Night Before Maiden Flight 10-24-2015

Hi Guys,

Completed the model to its fullest possible manner before the Maiden Flight on Sunday morning (Today!).

Performed some needed adjustments on both Flaps halves on both wings and Left Aileron control surface.



Black Intake decal missing ever since I took ownership of the model and it bothered me to no end so, I made my own decal and came out pretty good, if I may say so.








Worked on the Battery Tray Holder and came out really good.







Worked on the Top Cockpit Hatch to allow the battery to sit without making contact with the bottom end of the hatch.




Relocated the Pilot Figure further AFT in the cockpit


READY FOR MAIDEN!
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Old 10-25-2015, 06:30 AM
  #66  
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Default Showing it before Maiden!

Okay......

Showing a picture wide angle and closeup before Maiden Flight!

Either it will fly or not!:popcorn:



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Old 10-25-2015, 07:36 AM
  #67  
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The VERY BEST OF LUCK .....

Go get'm !!

Nigel
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Old 10-25-2015, 05:55 PM
  #68  
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Exclamation Maiden Flight Summary!

Originally Posted by solentlife View Post
The VERY BEST OF LUCK .....

Go get'm !!

Nigel
Nigel,

Thanks so much for that LUCK wishes as I needed it and your wishes saved my model!

Post Maiden Summary:

This model is just an amazing Prop Jet model that unfortunately Hangar9 (Horizon Hobby) discontinued a few years ago. Yes, the model is heavy due to the initial design of being GLOW but, it is my opinion that the Electric Conversion has improve its flying abilities in many ways.

Given the take-off without slats nor flaps the model was lifted-OFF from ground slightly before its time and the Propeller Torque (P-Factor) took it into a slightly Left bank but, nothing that an experienced RC Flyer can't get out of. On the second (2nd) flight and take-off, I was ready for it and allowed the model to speed up some more on the ground before applying UP Elevator.

The Loop attempts were unsuccessful, however, I attribute this from uneven push ROD adjustment(s) and while UP the Elevator Halves are not equal so, the model performs a lazy 1/2 barrow roll. As you can see in the Video, the 2nd Loop Attempt I allowed the model to stall and came down in a flat spin condition. I gave it down Elevator and slight power then, the model recovered. Thank goodness for the 5 Mistakes High!

The first landing was done without flaps and with a slight tail wind and she zoomed passed the landing strip. On the 2nd landing I used flaps and I did noticed just a hair indication of UP but, the model maintained level flight without too much Down Elevator input. 2nd landing was DEAD STICK and it floated slower and once again passed the landing target and onto the grass without any damage.

This has been an awesome project and the model looks great in the air!
Thanks ALL for chiming in with your recommendations and tips.

Carlos

Post Maiden Flight Pictures!



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Old 10-25-2015, 06:50 PM
  #69  
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Guys,

Here is the Maiden Flight Video!

Make sure you select High Resolution and Full Screen!

https://youtu.be/S5GR9MLjh0M
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Old 10-25-2015, 07:59 PM
  #70  
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Yep... as expected bad snap-over at stall and a bit of the "Sabre Dance" issue.

Sabre Dance is the tips stalling before the rest of the wing and due to wing shape moving center of lift forward which can make it very difficult to recover until you get it into a fully developed spin.

https://www.youtube.com/watch?v=mZL0x-gEDM8
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Old 10-25-2015, 08:09 PM
  #71  
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Guys,

I found the model to be very forgiving considering the high wing loading and I horse the model UP before its time and reason for Prop P-factor taking over.

I will look into the Elevator halves
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Old 10-25-2015, 09:37 PM
  #72  
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Originally Posted by fhhuber View Post
Yep... as expected bad snap-over at stall and a bit of the "Sabre Dance" issue.

Sabre Dance is the tips stalling before the rest of the wing and due to wing shape moving center of lift forward which can make it very difficult to recover until you get it into a fully developed spin.

I don't know about the Super Sabre "Dance" as that was the F-100.

This Lockheed-Martin F22 Raptor does indeed perform a Flat Spin so, the RC model has the same type of characteristics.

Fast Forward to time hack 3:02 on this following Video and you will see the Flat Spin that I encountered with my model.

Full Size does it the same!

https://youtu.be/wT-MQ9e9q6I
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Old 10-25-2015, 09:45 PM
  #73  
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I didn't name it the Sabre Dance...

Watch the clip... THEY call it the Sabre Dance
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Old 10-25-2015, 09:54 PM
  #74  
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Well,

The Nose Wheel Steering is all fixed as this was the reason for not flying it for the 3rd flight as the battery was topped off.

Just to let everyone know, I took two different battery packs......

1. Turnigy 4-Cell, 3,300mAH, 30C Lithium Polymer.
2. Admiral (MotionRC) 4-Cell, 4,000mAH, 35C, Lithium Polymer.

The first flight it flew with the Admiral 4,000mAH pack and certainly it was heavy but, delivered the AMPs that the motor asked.

The 3,300mAH is an older battery pack and found myself pretty much at FULL Power most of the time to keep airspeed but, did well considering its age.

Now, I am tinkering with the Elevator Halves and push Rod arrangement. If I don't get the Elevators aligned equally, I will use separate servos for each!

Carlos
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Old 10-25-2015, 09:56 PM
  #75  
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The elevators ... two servos on separate channels ?

... I had similar problem on a couple of models of mine that I changed to separate servos ... with single - I had unequal movement and still with twin servos ... even with altering travel on the model and then with Tx settings ... I decided to g'tee equal movement by locking the elevators together with wire connector.

Unequal elevator movement is actually quite common but most people don't realise and trim it out ...

I make it a deal that I measure each surface movement on every model I set up or alter. Because of finding it on not only my models but also other peoples. Most times its such a small difference that quick pre-flight doesn't catch it ... but go into that loop and away you go !

Hope you find way to cure it ...

Cheers
Nigel
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