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X-treme/Skymaster A-10 1/7.5 Build

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Old 03-22-2018, 07:51 AM
  #101  
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Sergio, did you get a chance to fly yours?
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Old 03-22-2018, 08:27 AM
  #102  
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Originally Posted by ravill View Post
Sergio, did you get a chance to fly yours?
Hello Ravill,

Not yet, I'm waiting for a new clear bubble of the canopy, I was detailing the Canopy and when I tried to clean the excess of paint with acetone the clear bubble started to deform, so I tried to apply heat to correct it and it got worst, so I ordered a new one, and I’m just waiting for it to arrive
to install it, other than that the A10 is ready to maiden.
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Old 03-22-2018, 08:32 AM
  #103  
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Originally Posted by ravill View Post
I got her all put together and all systems are looking good. Little did I know that the new king tech G2's only work on LiFe type voltages, so I have to redo my power install on the turbines, but other than that, she just needs balancing and some engine runs and she should be ready to maiden soon!

Attachment 2259599


Attachment 2259600
looks great, what lighting kit did you use?
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Old 03-22-2018, 08:52 AM
  #104  
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Wow! I would never have thought that a little acetone would hurt the canopy that much. I'll have to make a mental note to not use acetone on canopies! I hope you get a replacement soon.

For lighting, I used unilight. I like their 8 channel controller and I went nuts with lights. I even have some special extra stuff. More on that later.

All that's left is to do some engine runs, clean up the install, install the cockpit and pilot and then balance!

And this is not a small airplane either. It is difficult to manhandle this thing around. I find that I am always putting too much pressure on the engine nacelles, then the slats, the gear doors,etc.... I can't imagine what it would be like moving a Mibo around for assembly!
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Old 04-16-2018, 09:36 AM
  #105  
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Ok, it's official, I needed 8oz (1/2 pound, <1/4 kg) of lead to balance! That's the lowest I've heard of yet, nice! I balanced with dry tanks, full UAT, gear down and on the rear most measure from SM (110mm back from the wing root).

What are people feeling like with the throws suggested by SM?
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Old 04-16-2018, 10:20 AM
  #106  
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Here are my control throws:

Aileron = 1” up, .75” down at root

Elevator = 1” up, .75” down at root (neutral position at blister)

Rudder = .625” either direction at base (max I could get with hidden mini digital servos)

Flaps = 1.5” landing full flaps

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Old 04-16-2018, 10:29 AM
  #107  
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Thanks Nick!

What CG are you using?
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Old 04-16-2018, 10:44 AM
  #108  
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CG = 110mm like you. Last flown October 2017 - horrible weather ever since in Northern Ohio!
__________________________________________________ _
My setup on my SM /Xtreme Jets A-10 1/7.75 (turbine version):

JetCentral Bee80 SE’s – 18lbs thrust each
Hitec 7955 for all wing servos, Futaba BLS173 on elevators, Hitec 7245 on rudders and nose steering
Unilight lighting
Powerbox SRS Gyro and a Powerbox single channel gyro on nose steering
2 – 2cell A123 receiver batteries in nose, 2 – 3cell A123 ECU batteries in nose, 1 – 2cell A123 lighting battery in nose
CG at 110mm 1.5 pounds lead shot in nose to balance
Dry weight – 37 pounds 6 oz - digital scales
Fueled weight – 44 pounds estimated

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Old 05-02-2018, 06:40 AM
  #109  
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Woohoo!

Successful maiden.

It needed the elevator trim pretty much right at the blisters, thank you Nick.

The rudders have a lot of authority.

This was many firsts for me so I was a bit more meticulous than usual. New radio system (Jeti DS-24), first twin, new servos (savox), sound system (!), new engines (Kingtech G2's) with onboard GSU's, first time with demon cortex pro......

Since I had not had the chance to run the engines full throttle, and then pick up the airplane and move it all around at home, as the engines are too loud, I took the opportunity there. I've learned that you can have occult fuel bubbles that can be flushed out in this fashion. And sure enough, a bubble flamed out the starboard engine! EEK! But that is what ground checks are for. All subsequent full throttle shake downs were unremarkable.

I found that it had smmoooooottthhh take offs. It reminded me of my F-100. Those kind of take offs, make for a much less stressful flight.

My first landing was super smooth and my second landing had a small bounce and I found a crack in one of my landing gear blocks that I added to accept the BVM gear I'm using. I think the screws that I used to hold the gear on are too short. That should be an easy fix. Unfortunately, this grounded me for the rest of the day.

I also found that I need to increase the gear door delay as the air was slowing down the nose gear enough that it would get stuck on the outside of the gear door even after hitting the gear switch on rotation.

All in all, it was a successful maiden. I've got a few more things to iron out (I was ironing things out all day!) and I didn't have a chance to activate the gyro and play with it, so I'm excited about using it!

Check out my sound system! (Make sure you listen towards the end too, to hear and see the gatling gun!)









Last edited by ravill; 05-02-2018 at 06:45 AM.
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Old 05-02-2018, 08:52 AM
  #110  
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Beautiful Rav. Glad to hear all went well.

Scott
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Old 05-02-2018, 06:34 PM
  #111  
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Hello Ravill,

Glad to hear that you had a succesfull maiden, great idea the sound and light system.

Did you use the gyro? is it really necesary, I'm planning to add one for mine, a one axis gyro (Igyro 1e) just for the rudders, to help in case of a flameout.

Mine is still on the table, I´m still waiting the canopy, and I had a configuration problem with my Jeti CB200 and took it back for waranty, I hope to maiden it soon.

Regards
Sergio
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Old 05-03-2018, 06:48 AM
  #112  
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Originally Posted by sergio turbo View Post
Hello Ravill,

Glad to hear that you had a succesfull maiden, great idea the sound and light system.

Did you use the gyro? is it really necesary, I'm planning to add one for mine, a one axis gyro (Igyro 1e) just for the rudders, to help in case of a flameout.

Mine is still on the table, I´m still waiting the canopy, and I had a configuration problem with my Jeti CB200 and took it back for waranty, I hope to maiden it soon.

Regards
Sergio
I did not get a chance to use the gyro. One of the steps that you have to do is to redo the stick position set ups after trimming out your airplane. I had to "figure" out my new Jeti DS-24 and I was planning on turning on the gyro on the next flight but my gear block crack kept me from doing that.

Is a gyro necessary? Well, that's like a rhetorical, metaphysical and philosophical conundrum! LOL!

I had one bad experience with a gyro that cost me my F-4 phantom. It was my fault as I didn't know anyone who was flying with one and I set it up wrong. Here is the tip I did not know: Make sure you can turn off the gyro at anytime. This is the most important tid bit. The next important tid bit is, being able to change your gains in flight.

Click image for larger version

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I have an electric tucano that I've been playing with a demon cortex with, and it is 100% better to fly with a gyro than without.

A-10's (shoot, any twin) have tons of reasons of why they could have a lot of gain (pun intended!) with a gyro. I say, if you are thinking about putting a gyro on one axis, you might as well do all three!
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Old 05-04-2018, 11:20 AM
  #113  
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Congrats on the successful maiden flight! Glad all went well. Lots that could go wrong on a twin with that many control surfaces. The small SM A-10 is a joy to fly as you discovered......

Working on adding D4S ordnance (kit form) to my small A-10 for this season. Lots of work......

Nick
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Old 06-04-2018, 03:49 PM
  #114  
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Hey Guys a question. Did you hysol/epoxy your engine pods to fuse? SM instuctions say to with epoxy. I see there is a bolt and washer but not sure if I see a need to bond them to fuse?
Thanks for feedback!
Rob
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Old 06-04-2018, 04:35 PM
  #115  
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I did not epoxy or Hysol my pods. I thought of my giant scale aircraft and the force on the wings. All the force is against the wing tube and the attachment to the fuse is a relatively small screw and small anti-rotation pins. Same with the turbine pods in my opinion; all the force is against the carbon fiber rods.

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Old 06-04-2018, 06:50 PM
  #116  
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Flight of the Valkyrie's made me smile.

Grats on the maiden!
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Old 06-05-2018, 12:05 PM
  #117  
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Thanks Bob!

After I had one of those nacelle screws knockout the backing plate of where they mount, I just decided to glue the nacelles.
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Old 06-08-2018, 07:23 AM
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Hi Ravill,

Which sound and lighting system did you use? Love the Brrrrt of the gau-8 with the muzzle flashes! I'm in the process of setting up a gen3 Mibo A-10 and would love to add sound and lighting.

Dave

Originally Posted by ravill View Post
Thanks Bob!

After I had one of those nacelle screws knockout the backing plate of where they mount, I just decided to glue the nacelles.
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Old 06-08-2018, 08:19 AM
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Okay guys how did you secure nacelle doors? Was thinking of tongue and groove type of closure? Any pics would help.
Rob
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Old 06-08-2018, 12:23 PM
  #120  
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Originally Posted by zdsh13 View Post

Hi Ravill,

Which sound and lighting system did you use? Love the Brrrrt of the gau-8 with the muzzle flashes! I'm in the process of setting up a gen3 Mibo A-10 and would love to add sound and lighting.

Dave


Actually a canadian company.

Model Sounds Inc. - The Ultimate in Radio Controlled Model Sound Systems


Lights are unilight.
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Old 06-08-2018, 12:23 PM
  #121  
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Originally Posted by Robzylla View Post
Okay guys how did you secure nacelle doors? Was thinking of tongue and groove type of closure? Any pics would help.
Rob

I glued wood stoppers on the inside of the corners and used good ole fashioned screws.
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Old 06-08-2018, 01:23 PM
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Thx Ravill,

When your flying can you hear the cannon fire?

Originally Posted by ravill View Post
Actually a canadian company.

Model Sounds Inc. - The Ultimate in Radio Controlled Model Sound Systems


Lights are unilight.
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Old 06-08-2018, 03:01 PM
  #123  
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Originally Posted by ravill View Post
I glued wood stoppers on the inside of the corners and used good ole fashioned screws.
Same here. One in each corner and one in the middle of each of the three sides.
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Old 06-19-2018, 07:35 PM
  #124  
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Ok thanks for fix on turbine nacelle hatch covers. Im on to my next problem and a bit more serious!
I had designed the layout to include the fuel tanks being back against the former underneath the mid fuselage hatch right on top of the wings spar. Now realizing that the wings bolts are inserted from the inside of the fuse so realizing fuel tank placement will need to go forward. I could swear that pics of Sergio Turbo build shows tanks underneath the hatch cover at mid fuse. Sergio???
Thanks
Rob
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Old 06-19-2018, 08:10 PM
  #125  
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Originally Posted by Robzylla View Post
Ok thanks for fix on turbine nacelle hatch covers. Im on to my next problem and a bit more serious!
I had designed the layout to include the fuel tanks being back against the former underneath the mid fuselage hatch right on top of the wings spar. Now realizing that the wings bolts are inserted from the inside of the fuse so realizing fuel tank placement will need to go forward. I could swear that pics of Sergio Turbo build shows tanks underneath the hatch cover at mid fuse. Sergio???
Thanks
Rob
Hello Rob,

I insert the wing bolts from the outside under the fuse.


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