The Snake

My Feedback: (10)

Power tested the navigation lights and landing lights.
Working on the plumbing, everyone says I should use the 60 Itrap so I mounted it the same as Rudy did.
Still trying to hook up the wiring for the gyro and yes =AZXtG7tFNVhlaB76aXDo3IV9BeG1sDqgRlu9AkmFnd_TE4Pf5 KWNbZUo9qKQHJGvrpMy1UAz7jjGeIoc6U0Tl_QTLEOZqQn_Nnn 8qAjWReQEXAye1Z_67vWsMd0WWluwtKw&__tn__=-]K-R]Ralph Salgado the brake gyro . Test the gear doors soon.

essyou35

My Feedback: (11)

Nice build.

I am having issues with my front gear stopping randomly, I think it may be if the 2s Lipo I am using is not 100% charged. It seems 90% even can cause issues. Mike says a 3s Life is permitable (9.9v) but I think I am going to go the route someone else mentioned. Ill use a 3s Lipo with a CC pro regulator to 8.4V. I may up it slightly if I need it though.

I think will ensure I have a steady 8.4V without having to over volt it.

Vincent

My Feedback: (61)

I have had that JP controller do strange things when powered by direct a 3 cell life battery. Nothing will smoke but sequencing will get confused doors and gear will be out of time etc. regulating it to 8.4v problems disappear and things work smoothly. This has happened to me on several of my installs and once i discovered this and installed a castle regulator the quirks are gone.

essyou35

My Feedback: (11)

Good 2 know, Im having it do strange things at 8V so lets see if this regulator fixes it.

essyou35

My Feedback: (11)

Maybe my gear controller is just crazy, but Id be crazy to use it. Even with a CC pro regulator at 8.5V the thing still is unreliable.
I have all 3 gear plugged in and the servos plugged in. I put an ammeter on the front gear. Randomly the front gear just decides to stop moving. The ammeter proved the controller is actually stopping the gear, its not jammed, it never pulled any high current. I power reset of the gear controller makes it go away and it then it will cycle a couple times ok. Its like a software bug of some sort.

Then for the gear doors, I setup one got it working, setup the other two got them working. Then the first one quit working, it just stays open. It is in D mode. I have made certain the servos are not stalled.
Then it smoked one of my servos.

I installed a jetronics door sequencer and within 5 minutes have them working with a 13 second delay. Without the servos plugged into the JP controller, it seems happier.

I am going to get the xicoy as this controller still randomly just messes up for no reason. I think the issue is they are trying to detect when the gear are fully retracted based on current draw and that DOES NOT work.

I tried a er-150 controller and it works perfect, unfortunately it never turns off the current and it sits there pulling nearly an amp forever.

I think I got it for now and need to test it a few more and see if that front gear behaves!

Ive lubed it, watched the current draw, it is not jammed at all. The controller is just simply buggy.

tp777fo

My Feedback: (28)

I'm using the JP controller to operate the gear only using 2s LIPO. The gear/doors sequence is run by my Jeti transmitter sequencer program. Yep, it eats up a lot of channels but works well. I added a CB100 to my CB 210 to give me enough channels. So far it is working well.

essyou35

My Feedback: (11)

Did you have issues with the gear doors as well?

Vincent

My Feedback: (61)

The JP controller also has a long delay on the initial up gear cycle. I set my travel to 150 on the up side and it speeds up the cycle. I run gear and door sequencing thru my DX 18 where i can but that jp controller has a nice feature where it waits to see the gear cycle completed before activating the doors. If you notice there is no time delay settings in that controller. This way in the event you have a gear stuck down (like i did this weekend) the door will sit there open and not slammed up against the gear leg burning up the servo.

essyou35

My Feedback: (11)

A nice feature that doesnt work on mine.

tp777fo

My Feedback: (28)

No. I had problems with the JP controller. It moves the gear fine but couldn't adjust the door closing on one gear. I have a new controller and may install it when I get back to this one.

essyou35

My Feedback: (11)

I ended up getting the xicoy lg15. Dont waste your time with the JP one.

For throws, elevator says 25mm. Is that 25mm up and 25mm down or 25mm total up and down (12.5 up and 12.5 down)

The Snake

My Feedback: (10)

essyou35

My Feedback: (11)

Congrats on the maiden, but what a horrible place to fly a jet.

Vincent

My Feedback: (61)

Weird to see the gear doors open with the gear down. The nose strut looks like it was not fully extended on landing but did not cause a problem great job!!

tp777fo

My Feedback: (28)

What motor and where did you set your cg?

The Snake

My Feedback: (10)

I started at 430 mm but it still seemed nose heavy. The Acex 190

The Snake

My Feedback: (10)

Yes I noticed the gear was not all the way down but it was too late, I think my battery is draining too quickly with everything hooked up to it the navigation lights and the landing lights seem to be on all the time. Plus I had the strobe light plugged in too. But I believe the motor shaft got bent. So I asked Mike if I could get it replaced

essyou35

My Feedback: (11)

Throws? 25mm total or 25mm each way on elevator?
What do the air brakes do, are they worth activating and do they cause any pitch or roll or anything?

tp777fo

My Feedback: (28)

Thanks

seattlebuoy

My Feedback: (1)

QQ: what did you sat as your LG15 current limit? I am going this route. Don't have time to fiddle with the JP controller, went down that path in a prior plane, bit of a time sink...

​​​​​​Thanks!

essyou35

My Feedback: (11)

I went with .9A on the mains and nose. I forgot why I set it there but i know I used an ammeter inline with the the JP controller to come up with a value. I also have stalled them a couple times during testing no issues.

I know I talked with Mike but for my peace of mind, would you measure your stab incidence left and right? Mine differ Id feel better if someone else did it too.

seattlebuoy

My Feedback: (1)

Thanks. I was guestimating about that.

There was a post on FB where Mike stated this was due to fuselage mold and theybare set correctly vs. wing. Check there for more details. I am traveling at the moment, so no access to the plane.

essyou35

My Feedback: (11)

That was me on FB, but no one has confirmed what mike said. Im concerned mine is the only because if others were that way someone would gladly confirm.

seattlebuoy

My Feedback: (1)

Measured as you did, mine were 25mm on left and 27mm on right side. That looks similar to yours. Perhaps pull out an incidence gauge to see if same angle.

essyou35

My Feedback: (11)

Hey Guys had a maiden tonight. Whatever the reason, I needed 0 trim. Never had that happen.
I do have a cortex gyro but had it turned off, there wasnt much wind but Im thinking I dont even need a gyro. Normally f86 tail wags but this one didnt seem to do it much.

Unfortunately on landing I ran off the side of the runway and my front strut collapsed. The jack screw on the retrac motor snapped so I ordered a couple more. Banana hobby is the only place I could find them stock they are M4 47mm version so Ill cut it down to 42mm.
A club member took a video Ill try to post it.

Great flying jet, very stable. No ad habits.

CG is around 420mm and I have extra throws all around. I plan to add much more aileron.

The main retracts did not fully retract in. I was probably going a little fast. I am using the lg15 controller and may need to dial up the stall amps a bit more to account for wind. More than likely just need to do a circuit and slow way down to retract them which par for jets with gear doors and complex gears with heavy tires.

My mig29 which was air, was the same way, big rear tires and sensitive to air speed.