roydefiant

Almost done with cockpit

ravill

My Feedback: (11)

These pics are amazing!!!!

Auburn02

My Feedback: (1)

It's hard to tell from the angle, but please don't glue the back of the pilots' helmets to the headrest like everyone loves to do on our models. That's not how pilots sit/look in the cockpit.

Cockpit looks awesome though.

roydefiant

Thanks. I can remove the whole thing in about 3 minutes

flyloose

Andrew Bird

A few from today - Tim and I eventually ended up at the same place with both of ours.

flyloose

Awesome pics guys....Question about the difference between the 27 vs 30. I see the 30 has canards and the double nose wheel assembly. Were there additional mods done between those two?

Dave Wilshere

The front fuselage is different where the canards mount. From memory there is a fin difference too. The model is ordered in either version.

flyloose

Got it, thanks

Andrew Bird

And obviously the biggest difference is the 27 is better

Pierrot57

Some pictures about mine, engine are 2x Jetcat P130 Rx

Dave Wilshere

Looks amazing and with 300N+ on tap and light turbines it’s going to be fantastic on the vertical acceleration.

Dave

Pierrot57

Thanks,

not made the maiden, but lots of power inside 😉

Best Regards

roydefiant

Business End

skymaster68

My Feedback: (4)

has anyone installed electron's linear actuators for gear doors and retrofited DIY Electron Electric motors on the Retracts??
On 7ht day of quarentine I'm think a lot of staff ....

Edgar Perez

My Feedback: (13)

Hello. I bought a second hand SU-30 jet and would like to confirm if anyone is flying either that plane or the SU-27 with a CG different than the 20mm in front of the main wing tube indicated in the manual? Mine needs a lot of weight in the tail to achieve the manual recommendation... Thanks!

Auburn02

My Feedback: (1)

Where are your batteries and what engines are you using?

Edgar Perez

My Feedback: (13)

Using two JetCentral Cheetahs. The prior owner have Jetcat P100 with a single ECU battery in the nose, and other batteries in front of the cockpit,. I was waiting on the CG measure to decide where the two (2) ECU batteries should go. I did the CG measurement and even if I were two locate the two batteries in front of the vertical stabilizers (behind target CG), will still need to add about 2 pounds in the tail to achieve 15mm (midpoint 10-20 mentioned in the manual) CG
At around 62 pounds, the plane seem to be "overweight" by about 10 when compared with what the manual states. The plane do have the thrust vector system, so i do expected it will be somewhat more heavier in the tail.

I'm going to repeat the CG measure with a different system to be sure. I used a digitech digital balancer, now will use a balancing jig. However I don't imagine that a small measurement error with the digital system will result in such a big difference.

Asking about the CG being used, so that I can minimize the amount of weight needed.

Thanks!

Dave Wilshere

The manual setting is for the SU-27 is nose heavy, but it’s OK for the canard SU-30. Tanks with landing fuel in

Auburn02

My Feedback: (1)

The one I built also had Cheetahs, but all 4 batteries are near the forward edge of the cockpit. Granted this is the Su-27 model so perhaps the canards add a bit of weight. But then, you have thrust vectoring which we did not. I think we balanced just on the front edge of the main spar. Seems crazy to have to put the batteries basically in the tail and still be that nose heavy. We also did not have a cockpit or pilots in it at the time, is your cockpit that heavy?

Are you using electronic scales or supporting the plane at the balance point?

Edgar Perez

My Feedback: (13)

Ok. So CG should be as per the manual, but measuring with tanks filled with landing fuel.
Forgot to mention I added two 40 ounces tanks. I set them up to empty first and keep them empty for the CG measurement. They are close to the CG, so don't think they are a factor here.
Thanks

Edgar Perez

My Feedback: (13)

I used digital scale, but will verify today using balance jig. I know its easy to make a mistake with the digital ones, so always recheck with other system. Waiting for my wife to help my lift the plane (LOL) , as the virus lock-down make it difficult to get help in the shop. The cockpit don't seem particularly heavy.
Hopefully it s an error using the digital scales..

Dave Wilshere

The balance is not critical, for sure it could go back a little more than manual even on the SU-30.
With the SU-27 it’s normal to have the batteries back from the nose.

Edgar Perez

My Feedback: (13)

So I was able to recruit my wife to help me put it in a balancing jig.
Good news: results are aligned with the results using the digital scale.
Bad news: need to figure out how to secure batteries in the needed location so its not too hard to recharge them, plus securing the 1.8 Lbs / 0.8 Kg in the vector thrust area

Appreciate everyone inputs.


thats 1.8Lbs in the tail area

About 15mm in front of the main tube

Andrew Bird

Looks fantastic Edgar! I was running with 240 grams of weight in the tail cone extension where you haver some weight in the picture. Over time the wood in that rear former started to crack where I had the key way cut to hold it on. I've shifted the batteries back now to remove the weight and used carbon plate on the woodwork to strengthen it if I decide to stick any weight back there again. Just a heads up if you do put some weight back there

Cheers,

Andrew.