Trex 450 SE and general build videos are here

[skid]

I don't know how much roll you are getting, but that is normal to a point. It is caused by advancing and retreating blades in ff. If the head was spinning counter clockwise, the heli would want to roll left. Some one please correct me if I'm way off on this.

[Finless]

Are you seeing this int he swash plate when watching it on the table? If you are something is not right as there should be very little noticable at the swash.

What radio?

Bob

[spankedchrome]

(My first post !!)

A super fantastic on the Vids Bob , I'm not yet a flyer as I've been confused with having bought a Robbe FC28 Tx with a printed off
( http://www.mh.ttu.ee/risto/rc/fc28.htm )manual at Font size five :shock: and miss-understood I was to go through with Tx programming through masses of assigning channel mix to channel whatever for at least 5 months of through studying (monsterous) , But now your videos have explained it all , It's quite straight forward after all :mrgreen: .
Thanks :idea: :lol:

Oh yeah , I now know the tail blades are the wrong way , thanks BOB-vids and ,.. SKID + (How nice to meet you all like this .) :glasses2:

[skid]

spankedchrome.... your tail rotor blades are on backwards. Also check the directon of the tail rotor. when you turn your head clockwise, the tail should turn counter clockwise when looking at it from right side. :wink:

[4trx]

Has anyone tried flipping the tail shaft mounting blocks upside down , so the smooth part is on the bottom.
Rick

[AntP]

Thanks for posting all this .. i am new to helis and this has been VERY helpful .. :noteworthy

[Finless]

Hey all... helping is why I do the vids.... Thanks for all the thanks!

Just please tell me when you get in the air and how well it went! That's what floats my boat :)

Bob

[MarkD]

Hi - first post :D

Not new to heli's but new to the forum. Just watched the CCPM vids and I wish these were out a few years back - would have made setting the Morley F1 up a breeze. Now just need to apply the theory to the F1 and the Shuttle to increase the neg pitch without binding :D

Just one question tho - I've just bought a 450SE and is it normal to leave out the rubber vibration dampers on the servos?? I'v always used them on my 30 and 60 size heli's as per the destructions

[Finless]

Yea we dont use the rubbers on the Trex.

Bob

[sjaa]

Are you seeing this int he swash plate when watching it on the table? If you are something is not right as there should be very little noticable at the swash.

What radio?

Bob

Hi Bob..

Yes I can see the int on the swash, it´s not a lot; maybe 1 mm at the most. In flight it´s enough to get the heli of track in a loop by several meters. I use Waypoint 084 servos, Graupner MX-12 radio (Jr equivalent is 6102 if i´m not mistaken) Gyro is a 401 with a Waypoint 060PB (0.09 sek/60 degrees).

I have angeled the servo-swash rods as accurately as possible, but with the align cf the angles of the rods will not be equal across the whole servo travel; and this is what I think might be the problem here. I had to put in a small amount of sub-trim to get the servo arms at 90, but no more than the value 30 on the radio (I am at the office atm, so I can´t check what the unit for sub-trim is). Is it possible that subtrim can cause this problem? I thought that only affected endpoints at extreme movements, and my setup i am nowhere near extreme travel for any of the servos.

Will I be able to solve this by mixing, or are there something important I have overseen?

Thanks in advance for all help :)

Best regards
JoE

[AdrianM]

I have some issues with interaction on my XL with Align CF frame.

When trimmed in hover it tends to give a small amount of right roll input in ff/fff. This is bloody annoying, and I´m thinking about trying to neutralize the interactions with mixes. I know a few others struggeling with the ccpm interactions, maybe this could be the subject of one of your great vids Finless?

I think I can say that your videos has learned me most of what I know about my rex.. Thanks a lot!

When you look at your cyclic endpoints (ATV's on Futaba) are the cyclic inputs very close to equal in pitch and roll? If you have your head all square mechanically all your endpoints should be very near equal.

I looked over a buddy's heli that had a problem like what you describe and he had 32% left Ail. and 77% right Ail endpoints. He swore this was how it had to be to get 6 deg of Ail cyclic in both directions. 15 min of spinning rod ends later we were at 44% in both directions and his roll on forward cyclic was gone.

Check your washout block and see saw pivots for wear. If those two bushings wear all kinds of goofy stuff can start happening in the head.

[sjaa]

I have some issues with interaction on my XL with Align CF frame.

When trimmed in hover it tends to give a small amount of right roll input in ff/fff. This is bloody annoying, and I´m thinking about trying to neutralize the interactions with mixes. I know a few others struggeling with the ccpm interactions, maybe this could be the subject of one of your great vids Finless?

I think I can say that your videos has learned me most of what I know about my rex.. Thanks a lot!

When you look at your cyclic endpoints (ATV's on Futaba) are the cyclic inputs very close to equal in pitch and roll? If you have your head all square mechanically all your endpoints should be very near equal.

I looked over a buddy's heli that had a problem like what you describe and he had 32% left Ail. and 77% right Ail endpoints. He swore this was how it had to be to get 6 deg of Ail cyclic in both directions. 15 min of spinning rod ends later we were at 44% in both directions and his roll on forward cyclic was gone.

Check your washout block and see saw pivots for wear. If those two bushings wear all kinds of goofy stuff can start happening in the head.


Hi and thx for an informative reply.

The head parts are all as good as new (as I am a sucker for bling :)), so that should not be the problem. I am fairly sure that the endpoints are pretty close, but I´ll definetly check them very carefully when I get home from work.. Makes total sense btw :)

[reman]

My T-Rex started as the hde 450 x, But over time its evolved into a sort of short boom se with the last upgrade being the align cf frame + 3 lug swash, and I just thought "Well, everyone says to setup ccpm is a pain, but I found setting up the mechanical mixing so easy, so the ccpm can't mess up my mental state to much........"

I've just watched the "CCPM Setup Part 1 + 2" videos.

:shock: :shock: :shock: :shock: :shock: :shock: :shock: :shock: :shock: :shock: :shock: :shock: :shock: :shock: :shock: :shock: :shock: :shock:

All I wanted to do was get a stiffer frame with less linkages so less free head movement.

I'm now thinking that mechanical mixing wasn't so bad after all.

( Now then........ , erm......... , Were DID I put that xl hde frame?)

[Finless]

reman... really it is NOT hard! Just go for it!

Bob

[Leeadam]

Bob your a genious with all those vids i am about to build my 450 se at weekend and these are such a help..THANKS. :D

[Finless]

YOUR WELCOME!

Thanks for taking the time to post a thanks :)

Bob

[Leeadam]

thats ok..your vids prob help tons of people out...can i ask....i have not looked at all the vids i will this weekend...have watch the soldering one as i was worrying about doing it. also on your setup videos is that just setup fror 3D flight?? i want to setup for standard flight as i am not fully fledged 3d fligher yet?

thanks again.

[Finless]

Set up for 3D and normal as I show! I am not a proponent of teaching the other way (hover at 1/2 stick) as later you have to re-learn the throttle stick and sensativity! Honestly my setup for normal mode really is for "standard flight" as the pitch curve reduces negative pitch for learning yet allows you to go into idle up for 3D and have the same stik poistions. It really is the best way and Oh.... this is how most simulator software comes configured too!

Bob

[MarkD]

Set up for 3D and normal as I show! I am not a proponent of teaching the other way (hover at 1/2 stick) as later you have to re-learn the throttle stick and sensativity!

I learnt with hover at 1/2 stick and going to 3/4 stick was a real mind bend at first. Prob the same as tring to convert from thumbs to fingers and thumbs but not as painful

BTW Bob have you done a vid for the tail setup after the mech stage?? Reason I'm asking as with the 401 I have set up the hover pitch using sub trims and then letting the gyro find neutral on power up. With my other heli's I've set them up using mech as the hover point using CSM 400 Gyros. These let you set each end point seperatly (same as 601??)

Just querying as I can't seem to find anything after the mech setup :D

[Finless]

Yea I did a 401 setup vid if that helps?

Bob

[reman]

Hi there Mr White sir, I watched the CCPM Setup videos again and I think I may have got the head setup ok (ish) now, ( at full pos pitch one blade is just over 10 degrees and the other is a smidge under. similar at neg pitch but around 9 degrees. )

I think I'll just get the blades tracking ok for now as sods law says if I spend hours getting the pitch matched perfectley, the blade tips will be traveling in two disks 2" apart. :?

I don't like spending loads of time getting everything spot on perfect yet as I'm still at the stage were about 1 in 10 flights end in an "abrupt unconventional landing" (and rebuild).
[note to self] , must think up some new excuses as the "Radio glitch !" and "The wind caught it" ones are starting to get over used :roll:

Anyway, there was bound to be a question or two in here somewere, so......

Were they Hitec HS56HB servos in the CCPM Setup videos ?
If so are they much better than HS55's (I've been using these as there not very expensive in the uk, and pretty much every hobby shop keeps the gearsets on the shelf.)

Also, My tail rotor seems to take all day to push (or pull) the tail end around 360 degrees, Am I right in thinking that the gyro see's any tail rotation as something it needs to correct ? ( I'm using a Futaba G190) (Stop laughing every one, I got it when I didn't know any better and I can't afford a GY401 yet.) If not is there any thing else I should check (I've already set the slider to use all the available tail shaft. )

Anyway, I think thats enough for one post so I'll just say thanks again for all the build videos, You're a star !

:D :D :D :D :D :D :D

[KriZb]

I just had my first flight with the SE, after watching all of Bob's video's. I helped me allot to setup this bird :noteworthy Its so stable that i didn't even had to trim (no wind) I can hover for a few seconds without having to touch the controls :D I am very happy and could not have done it without your video's Bob! Thanks :noteworthy :noteworthy :noteworthy :noteworthy

Kris

[scoter12@msn.com]

thanks im learning alot out of these vids.
wat to go

[asong26]

thanks im learning alot out of these vids.
wat to go

Me too! We should find a way to nominate your to the Emmys :lol:

[Finless]

That would be cool! An Emmy... Yea!

Maybe for the lowest B quality movie ;)

Bob