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Hangar 9 F22 Raptor Glow-To-Electric Conversion

Old 10-25-2015, 10:02 PM
  #76  
guapoman2000
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Originally Posted by solentlife View Post
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
Nigel,

The Elevator halves are linked together (both push rods are linked together using a round metal ring with set screw). I noticed this a LONG TIME ago and noticed the uneven UP Elevator situation but, I really didn't think it would cause such an issue but, it did!

I will perhaps bite the bullet and add another servo (reversed) to use on one side and be done with this issue.

Thanks!
Carlos
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Old 10-25-2015, 10:44 PM
  #77  
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You can play fun games with mixes if you put the elevators on separate channels.

But.. you will be adding the weight of another servo in a model that is already a bit heavy.

An alternative is "mini" class servos but they are expensive just to save about 1 ounce.
HS-85MH (a "fat micro" or small mini)
HS-225MG
HS-5245MG
$25 to $40 a servo
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Old 10-25-2015, 11:08 PM
  #78  
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Originally Posted by fhhuber View Post
You can play fun games with mixes if you put the elevators on separate channels.

But.. you will be adding the weight of another servo in a model that is already a bit heavy.

An alternative is "mini" class servos but they are expensive just to save about 1 ounce.
HS-85MH (a "fat micro" or small mini)
HS-225MG
HS-5245MG
$25 to $40 a servo

Thanks for that......however, I have two JR SPORT ST47's that will add another 1.5 oz. and I am not in the least worried about any weight gain as I have it less than 7lbs. and that's using the large 4,000mAH 4-Cell battery pack.

I was surprised that it didn't weigh-in heavier since I used Standard Servos for the Flaps.

Nope, I believe it will still haul the mail with another 1.5oz. on-board.

Thanks for the suggestions.

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JR SPORT ST47 Pair.jpg (123.2 KB, 299 views)
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Old 10-26-2015, 01:06 AM
  #79  
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Default 2nd Flight Pics!

Guys,

My buddy Gerry took some neat in-flight photographs from my 2nd Flight today after my maiden flight as he came later on in the morning to our RC Club.

The morning was heavily overcast which forced him to shoot at iso 800 and f5.6, not the optimum settings for quality action photography, however , thanks to Photoshop, he was able to extract some life from the otherwise dull images.

A few pictures and thanks to Gerry!















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Old 10-26-2015, 04:16 AM
  #80  
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Well guys,

I found an interesting BULLETIN for this model over at the HORIZON HOBBY web site and allow me to share it with all of you.

http://s733.photobucket.com/user/gua...ohehd.jpg.html

My only reason for sharing is that I am just thinking out-loud as what direction I will take to make the Elevator halves to be controlled by separate servos. Additionally, I am considering to change out the Futaba Standard servos with the JR SPORT ST47's as well.

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Old 10-26-2015, 04:31 AM
  #81  
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Okay,

In similar manner the user manual (perhaps an updated manual) lists three options for flaps. This of course pertains to the modification I am about to do with Elevator halves.

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Old 10-26-2015, 10:55 PM
  #82  
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Guys,

I had an opportunity to measure the UP Elevator Deflection on each Elevator Halves and was horrified to witness that the LEFT Elevator Half has 1/2 inch more than the Right Elevator half.

This certainly caused the model to ROLL to the Left on each LOOP attempt and certainly caused a stall way UP high and subsequent spin.

I will try the least expensive and less intrusive solution to the issue by disconnecting the clevis at the Right and see about increasing the RIGHT Elevator Travel while decreasing the LEFT some as well.







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Old 10-27-2015, 01:06 AM
  #83  
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Okay guys,

Got down to get her done with the required adjustments and it turns out that I will not need to add another servo for making Elevator Halves with their independent servo. I did go to the Hobby Shop and bought the Reversed JR SPORT ST47 (Part Number JSP20050R ), however, I will not be needing it since I was able to perform the adjustments at the control surface clevis end.



Additionally, during the 2nd landing the Nose Wheel steering quit working and the Keeper just came off from the Rudder Servo Arm so, I didn't have any plastic lock to match the size diameter of the keeper I am using so, I used a Wheel lock collar and worked like magic.



Also, I activated the model and double checked (Verified) that both Elevator Halves were matched for the entire travel and at every level including when it is at neutral.






I can't wait to fly it again!:popcorn:
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Old 10-27-2015, 01:42 AM
  #84  
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Guys,

Reflecting on the Maiden Flight gives me goose bumps that I didn't lose the model on Take-Off. Yes, I may have horse UP the model before its time but, I am certain that when I pull UP Elevator the model started its Roll maneuver to the Left as a result from the uneven Elevator halves!

I was lucky that I let go of the UP Elevator Pressure thinking that I was on a STALL due to my efforts of horsing up the model too soon.

In any regard, I just can't wait to see the model zoom like a home sick dove, like this LOW FAST PASS during the Maiden Flight!

https://youtu.be/uMujfDyVBLs

Last edited by guapoman2000; 10-27-2015 at 01:58 AM.
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Old 10-27-2015, 02:47 AM
  #85  
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I was just curious and decided to rough estimate the speed from the Video noting the distance of the pass when the model came into view all the way to the end of the field view.:p

Estimated a total travel of 260 feet and using 2.5 seconds.

That's 104 Feet per second (104ft./sec.)

That is almost 71-MPH.

Here's the Field and noting that I included additional travel footage:



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Old 10-27-2015, 05:17 AM
  #86  
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Curious- Is 71mph considered fast for that plane? My souped up PZ T-28(power-up 25) is as fast and my Roc hobby Voodoo will pass it like its standing still. Most of my edf's are at or above that range. Most are 100+ But if 71 is considered screaming fast for that plane, beat your chest ! Looks pretty nice !
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Old 10-27-2015, 07:11 AM
  #87  
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Hi G ... surely before maiden when you were setting up controls, a 1/2 inch difference in elevators should have been obvious ?
I always elevate model to eye-line and the view along length of model to check ailerons / elevators are aligned at neutral and deflected. The eyes are actually remarkably able to detect slight differences.
Also a quick way to check full reflection is equal .... deflect and hold, now tilt model while looking along longitudunally. The LE should appear and dissapear at same moment both sides with elevator.... change deflection and check same for ailerons. A quickie way to rough check.

Good you found it anyway before any crash.

Looking forward to flight reports !

Nigel
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Old 10-27-2015, 10:09 AM
  #88  
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Hi Guys!

This is perhaps the first RC Airplane Model that has a tapered trailing edge Elevator and for me was illusive for my eyes. The Elevator Halves looked okay when operated during my initial checks. My thoughts that the model had previously flown using GLOW power and the Elevators should have been setup properly during the previous owner, right? How WRONG that thought was! It may explain why (Chad) sold me the model as it looked pretty NEW!

As far as the Speed, I am just guessing and was just messing around with a wild guess estimate. I am hoping to have someone with a Radar device to make things more accurate.

Yes indeed, I will keep you guys posted on my next flight.

Thanks!
guapo
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Old 10-27-2015, 04:33 PM
  #89  
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Originally Posted by dahawk View Post
Curious- Is 71mph considered fast for that plane? My souped up PZ T-28(power-up 25) is as fast and my Roc hobby Voodoo will pass it like its standing still. Most of my edf's are at or above that range. Most are 100+ But if 71 is considered screaming fast for that plane, beat your chest ! Looks pretty nice !
says the slowest guy at our field -
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Old 10-27-2015, 04:41 PM
  #90  
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The average glow trainer cruises appx 55 mph. 70 is easy to achieve.

The PTS F-22, with the right prop and a good .46, couldn't quite make 100 in level flight.
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Old 10-27-2015, 05:09 PM
  #91  
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Originally Posted by fhhuber View Post
The average glow trainer cruises appx 55 mph. 70 is easy to achieve.

The PTS F-22, with the right prop and a good .46, couldn't quite make 100 in level flight.

I have been actively watching -- I have a New but out of box grey one, it will be getting a Hyperion HS4025 740kv that I have laying around on a 10S. Should tear the wings off
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Old 10-27-2015, 05:56 PM
  #92  
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Originally Posted by waytooslow View Post
I have been actively watching -- I have a New but out of box grey one, it will be getting a Hyperion HS4025 740kv that I have laying around on a 10S. Should tear the wings off
Hi WaytooSlow,

The issue (in my opinion) with a low Kv motor is that it would need significant more Cells to produce respectable RPMs at the motor output shaft. Certainly, one with more Kv's would limit the Propeller diameter size and I realize this, however, this model has already a limiting factor from the size of the landing gear setup out of the box.

Your selection process is a good choice assuming you can fit a 5-Cell Lithium Polymer Pack in this F22 Raptor.

I have attached two screen captures of an on-line (dirty, rough calculator estimator) and the motor's specification page.

Let us know who it goes.


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Old 10-28-2015, 05:27 PM
  #93  
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WTS is our club speed demon ! Go faster and do more damage !
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Old 10-28-2015, 05:34 PM
  #94  
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Originally Posted by dahawk View Post
WTS is our club speed demon ! Go faster and do more damage !

you all know me well..... bigger motor -- more cells !!!!!!!!!!!!!!!!
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Old 10-28-2015, 07:10 PM
  #95  
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You can always go to 2x 3S packs in series and put them one behind the other...

the rear one might not even reach back to the wing tube.
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Old 10-28-2015, 07:46 PM
  #96  
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Guys,

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

Tomorrow seems to be perfect for the 3rd flight (Post Maiden Adjustments) and will try to record another Video action.

Stay tuned!
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Old 10-28-2015, 07:53 PM
  #97  
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Originally Posted by waytooslow View Post
you all know me well..... bigger motor -- more cells !!!!!!!!!!!!!!!!
Hum......I would be careful with the speed on this model. Unless you have the all GREY covering and covering was applied in such a manner that there are no seams at the leading edge of anything then, I would say you are okay.

Unfortunately, I have had to touch UP various areas on mine (RED, WHITE) covering and noticed that there's a seam at the Leading Edge of wing and where the RED covering Diamond on TOP of wing was coming off at the edge.

I would highly consider some sort of clear tape or sealer if you find seams at the leading edges and most especially if the model has had contact with FUEL or FUEL residue!

Best of luck on your quest to break the Sound Barrier with yours!
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Old 10-29-2015, 04:51 PM
  #98  
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Default 3rd Flight after Post Maiden Flight Adjustments!

Guys,

Wow!

She is a terrific flyer!:p

After the Post Maiden Flight Adjustments, especially the Elevator Halves, it turns like she is on rails and oh, I didn't stall her up high as I was ready for her during a large wide loop!

She still comes in fast even with flaps.

Select High Resolution and Full Screen!

https://youtu.be/UpZC1na9c1Q
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Old 10-31-2015, 09:46 PM
  #99  
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Exclamation Saturday RC Flying (10-31-2015) 4th Flight!

4th Flight!

Guys,

Can't wait for Gerry's picture results as the sky was perfectly BLUE with partial clouds and he was able to place the camera in the optimum mode for best quality and sharpness.

Here are my own pictures from my iPHONE 4S while the model was resting at the setup table.



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Old 11-01-2015, 02:06 AM
  #100  
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Wow,

Today, I flew my F22 Raptor for about 6 minutes and it was pretty much at 3/4 Throttle for exhilarating speed and performance.

The charger just quit and placed back 2256mAH into the Admiral (MotionRC) 4-Cell, 4,000mAH, 40C, Lithium Polymer.

Seems like I am getting very good performance from these packs and I am planing on ordering some more.

Going to fly again in the morning!
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