Help! Sudden or no sufficient power from battery to motor, ESC heat up.

[Piotrsko]

Deltas are way too demanding for a new flyer. Kinda like putting a 15 year old drivers ed trainee in a triple trailer semi and expect them to back up straight the first time.

Video would help a lot if possible. Right now we're trying to figure out your description just to figure out what the problem is so we can figure out how to fix it.

 

[Karthik1130]

I agree with Foamforce, can you be more descriptive, what is the plane doing. Just climbing or looping, that is not an indication of tail heavy.
Every plane I have build, you fly it, then adjust the trim it to make it fly straight & level. Often it rolls to one side & climbs or drops, what ever it does, you trim the error out.


It is entirely possible the CG is off on the plans. I have had similar issues with the Tiny Trainer, but with the TT, climbing was not the issue. When you pulled up on the elevator, the wing stalled & it dropped out of the sky.

If it fly's well with the CG forward of the suggested location, then go for it. I'm in the camp if it is not broken, don't fix it. Move the plane until it balances level on your fingers, then tell us how far forward you have moved the CG.

The plane was looping, and not climbing after handlaunched.It loops and crashed into the ground.
When the CG is moved forward by 5.5cm, the plane flies level.

 

[Foamforce]

The plane was looping, and not climbing after handlaunched.It loops and crashed into the ground.
When the CG is moved forward by 5.5cm, the plane flies level.

5.5cm is a huge amount. Something is wrong. Just to confirm, are these the COG points you used? Can you confirm that they’re in the right place on your plane? Any possibility that you scaled your plane but forgot to scale the location of the COG points? Maybe add a photo of your plane with the COG points for starters.

 

[Karthik1130]

5.5cm is a huge amount. Something is wrong. Just to confirm, are these the COG points you used? Can you confirm that they’re in the right place on your plane? Any possibility that you scaled your plane but forgot to scale the location of the COG points? Maybe add a photo of your plane with the COG points for starters.

No, didn't scale anything. Just transferred the full size print plan.
Green point is original CG, Red point is the forwarded CG.

 

[Merv]

The plane was looping, and not climbing after handlaunched.It loops and crashed into the ground.
When the CG is moved forward by 5.5cm, the plane flies level.

I agree with Foamforce, 5.5CM is too much. Something else is way off.
When I had trouble with the TT, I moved the CG 5mm or 1/4 inch.

 

[Karthik1130]

I agree with Foamforce, 5.5CM is too much. Something else is way off.
When I had trouble with the TT, I moved the CG 5mm or 1/4 inch.

In the video link below, during the first trial by one rc pilot, the plane loops and falls in to the ground. This is what happening to me every time when handlaunched. Please click the link below to see the video:
Plane looping in first trial

 

[Merv]

...the plane loops and falls in to the ground....

That's a trim issue in the video.

 

[Foamforce]

In the video link below, during the first trial by one rc pilot, the plane loops and falls in to the ground. This is what happening to me every time when handlaunched. Please click the link below to see the video:
Plane looping in first trial

I agree with Merv. You probably need a bunch of up elevator trim, but you compensated by making it very nose heavy instead.

When I get home, I’ll fly my Delta, confirm the COG marks, and then take a picture of how much reflex I have.

 

[skymaster]

Stay away from those cheap ebay combos. The only good part from the combo is the a2212 brushless motor. i bought a couple of those and on the esc there is paste on the esc with a piece of metal as a heat sink in which the thermal paste is all over the place. witch eventually will end up frying the esc. also check the motor for loose bell make sure that it is secured if not your plane will stall and the motor will be super hot . Check your gear guys before take off. have fun.

 

[Karthik1130]

I agree with Merv. You probably need a bunch of up elevator trim, but you compensated by making it very nose heavy instead.

When I get home, I’ll fly my Delta, confirm the COG marks, and then take a picture of how much reflex I have.

Thanks a lot , for your help. I will also try the trimming method, and post the update.

 

[Foamforce]

Here is what mine looks like trimmed for straight and level flight. The right elevon is perfectly straight with the right wing. The left elevator is noticeably down.

What does yours look like? Make sure you plug in your plane and turn on your radio before checking.

 

[Karthik1130]

Here is what mine looks like trimmed for straight and level flight. The right elevon is perfectly straight with the right wing. The left elevator is noticeably down.

What does yours look like? Make sure you plug in your plane and turn on your radio before checking.

Hi,
Today took for flight.When I measured the angle at both the left and right elevon, it's zero angle to the wing.
As you said I balanced touch nose down on the CG mark as shown in the FT drawing.Then I trimmed the elevator surface , by pushing the trim button towards upside in the elevator channel in Flysky fs-i6 transmitter.
Handlaunched with half throttle, the moment it left from air, it crashed into ground by nose-diving (pitch down) immediately.

I don't know how much angle of down elevator trim should be set for handlaunching and straight line cruise. Before I could ever again try reducing the trim angle ,the firewall in powerpod and propeller got broken.
I don't know how much to trim in the ground. Because I am unable to trim in flight quickly after it's handlaunched, because there is no time to correct the trim, as it immediately starts nose-diving to the ground.

Please help

 

[Foamforce]

Ok, this is progress. Since it pitched up previously and now it pitches down, that verifies that it was a trim issue and not a COG issue.

To get this sorted, plug in the battery, turn on the TX, but keep your kill switch on (no throttle). Find an area with tall grass to reduce damage. Throw your plane (without throttle) and it should glide relatively well. If it noses down too quickly, give it up trim. Continue until it glides nicely.

Once you’re ready, double check that your thrust angle (angle of your motor to the front of the plane) hasn’t changed. Crashing frequently crashes the front of the power pod which pushes the motor down in front, and that will cause the nose to drop when the motor is running.

After that’s confirmed, take it for a flight and it should fly well.

Good luck!

 

[Karthik1130]

Ok, this is progress. Since it pitched up previously and now it pitches down, that verifies that it was a trim issue and not a COG issue.

To get this sorted, plug in the battery, turn on the TX, but keep your kill switch on (no throttle). Find an area with tall grass to reduce damage. Throw your plane (without throttle) and it should glide relatively well. If it noses down too quickly, give it up trim. Continue until it glides nicely.

Once you’re ready, double check that your thrust angle (angle of your motor to the front of the plane) hasn’t changed. Crashing frequently crashes the front of the power pod which pushes the motor down in front, and that will cause the nose to drop when the motor is running.

After that’s confirmed, take it for a flight and it should fly well.

Good luck!

Here there is no tall grass.can I try this by handlaunching on the bed from a distance? and also can I use 5 inch tri blade propeller?

 

[Merv]

... I am unable to trim in flight quickly after it's handlaunched, because there is no time to correct the trim...

Don't start trimming immediately after launch. You must fly the plane first & get some altitude, 2-300 ft (70-100m).

When you are at altitude, now you have time to trim the plane.

Have someone else throw the plane, this will allow you to have your fingers on the sticks to fly the plane. Have them throw the plane upwards, 20 degrees or so. Throw it with a force similar to throwing a ball 30 ft (10m). Your helper can also adjust the trim tabs while you are flying the plane. Move the trim tab the same direction you are pushing the stick. Keep trimming until the plane flys hands off the sticks, straight & level.

 

[Karthik1130]

Don't start trimming immediately after launch. You must fly the plane first & get some altitude, 2-300 ft (70-100m).

When you are at altitude, now you have time to trim the plane.

Have someone else throw the plane, this will allow you to have your fingers on the sticks to fly the plane. Have them throw the plane upwards, 20 degrees or so. Throw it with a force similar to throwing a ball 30 ft (10m). Your helper can also adjust the trim tabs while you are flying the plane. Move the trim tab the same direction you are pushing the stick. Keep trimming until the plane flys hands off the sticks, straight & level.

I couldn't able to reach and sustain that height you mentioned.It immediately falls down before I could ever try with the trimming tabs for elevons.Here , there is no tall grass to check the glide slope.

 

[Foamforce]

Here there is no tall grass.can I try this by handlaunching on the bed from a distance? and also can I use 5 inch tri blade propeller?

Yeah, throwing it onto a bed would work as long as you toss it hard enough. If you don’t throw it hard enough to glide, then it will just stall and fall to the floor.

Something like this is what you want…

Speaking of which, your problem might be that you’re just not giving it enough throttle when you launch it. Even a perfect airplane will fall (stall) out of the sky without enough air speed.

Post a video of your test flights! We can tell a lot more from that.

 

[Merv]

...It immediately falls down before I could ever try with the trimming tabs...

As I mentioned above, you need to get someone else to throw the plane for you. So that you can fly the plane high enough to trim it.

Fly the plane with the sticks on your transmitter until you can trim it.

 

[Piotrsko]

Might also need a good amount of down thrust.

Tall grass has this amazing ability to slow down and cushion a landing plane without damaging bits. If you leave footprints, it is either really wet or tall enough to work for everything but high altitude nose plant crashes.

 

[Karthik1130]

Hello all, today went for flight session with FT Delta rc plane again @25km/h.
First I tried handlaunching in the ground to check for glide slope with the CG aligned as per the drawing. The plane went few metres straight, and then nose dived.
I was not sure whether,that glide slope was ok, and whether I balanced the plane correctly.I didn't try trimming the plane with battery at the rear of powerpod because everytime it's backlooping and breaking the MDF board firewall and propeller.

So,instead of trying and breaking the powerpod, I altogether placed the battery,reciever,esc one behind the other from the front of powerpod behind the motor, and directly flew the plane. It flew straight, but observed a slight nose up tendency
So with a slight elevator up trim, I corrected the plane level relative to ground.

One of the vertical stabilizer got broken.Will it affect the plane stability?

Can, someone please help by posting a video of the position of plane at CG point balanced, the position of the electronics in powerpod and also how to trim the FT delta in ground which is looping back, to properly fly straight. It would be really helpful.