T-Rex 500 Info

[raptorheli2]

phil the angles are like that for a reason, it is to allow more pitch. finless done a nice little video explaining this. you may or may not agree with what they say but the video is maybe worth a watch then make your mind up boss.

http://video.helifreak.com/?subpath=...ame=geo101.wmv

[Smoothound]

I'll take your word for it then!


I can't be bothered to fiddle with my cookies etc. to get access to the videos I can log in, get my PM's but not see the videos for some reason

[J3DI]

Same here Phil, i've played with my cookies but still can't view videos - but can post OK.

[Leebert]

Interesting...
It's designed to reduce interaction due to the speed of the servos linkages changing due to the geometry of the servo arm and linkage (because the servo arm travels in an arc). It is set so that there is less interaction at hovering pitch (RWU) as this is where the heli spends most of it's time (unless your name is Trev ). I guess that whilst inverted, the interaction due to non-linear linkage movements would be worse?

[Ashley Davis]

cop out......most modern radios have settings to adjust for this and modify the way the servo travels to eliminate servo arc interaction.
On JR radios it's the EXP setting on the swash mixing menu. With a cyclock you can eliminate it entirely as you adjust interaction at minimum pitch, mid pitch and full pitch.

[Leebert]

I tend to agree. I'd rather have equal issues on both the positive and negative side of zero pitch. A cyclock would sort out any issues if required.

Ash or anyone who knows... Would a cyclock be able to deal with the fact that there would be different amounts of interaction on each side of zero pitch (I've never used one)?

[Smoothound]

Why not just design it right in the first place? Or am i just barking up the wrong tree?

[trvo]

Ash or anyone who knows... Would a cyclock be able to deal with the fact that there would be different amounts of interaction on each side of zero pitch (I've never used one)?

Yes, there's interaction correctors for both sides of pitch (separate). You need to set everything up correctly at 90 degrees for zero pitch, then check the travels at full positive, then negative and anything you have left over can be taken out with the interaction correctors...

Trev

[ChrisB]

Come across this database for Lipos mainly but has other stuff and is being updated regularly

http://progressiverc.com/Research.html

[Ashley Davis]

looks to be aimed at tracking low prices and where to buy rather than tracking performance of packs over time.

[Sesame]

Well it was all complete yesterday, had a little prob with CofG had to put a fair amout of nose weight in it to balance it out im gonna be using to start with 2 x 2100 revolutions from my 450. i'm using a small 5927 on the back so that not a reason for the lack of balance and im using a spartan fo even the gyro is very light, but anyway its done ive taken a couple of really awful snaps, which I shall improve on later. but the build ent very well. only snags I had were not enough spacers for the servos, only enough for the front servos, I had to make some for the rear one plus no canopy rubbers, which on the whole really isnt a problem, going to take it in about 20 mins for its first flight.

[ChrisB]

looks to be aimed at tracking low prices and where to buy rather than tracking performance of packs over time.

It looks like it is but i found the size and weight info useful,maybe it will get more detailed later

Just looked at the 6s side of it and its kinda wrong,it says the 4800 Revos have Align balance plugs!!!?

[Leebert]

Yes, there's interaction correctors for both sides of pitch (separate). You need to set everything up correctly at 90 degrees for zero pitch, then check the travels at full positive, then negative and anything you have left over can be taken out with the interaction correctors...
Trev

Thanks Trev.
Did you set your servo arms at 90 deg to the linkages (i.e. servo arms pointing slightly upward) or did you set it up with the servo arms horizontal (i.e. perpendicular to the servo)?

[trvo]

I set the servo horizontal since I was in a hurry to get out and fly it. I'd suggest setting them up 90 degrees to the rods.

Trev

[Edders]

well done that man I managed to maiden mine today .very few issues withteh build and flew pretty good for its first days flying. time to start the tweaking stage


Edders

Well it was all complete yesterday, had a little prob with CofG had to put a fair amout of nose weight in it to balance it out im gonna be using to start with 2 x 2100 revolutions from my 450. i'm using a small 5927 on the back so that not a reason for the lack of balance and im using a spartan fo even the gyro is very light, but anyway its done ive taken a couple of really awful snaps, which I shall improve on later. but the build ent very well. only snags I had were not enough spacers for the servos, only enough for the front servos, I had to make some for the rear one plus no canopy rubbers, which on the whole really isnt a problem, going to take it in about 20 mins for its first flight.