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HelicopterAlignT-REX 700XN News  700NX!!!
11-28-2017 02:55 AM  5 months agoPost 41
knightofcarnage

rrElite Veteran

chicago

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Wow it has a transmission in it.

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11-28-2017 03:47 AM  5 months agoPost 42
ICUR1-2

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Ottawa, Ontario

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That last picture really is disappointing seems like a horrible design IMO . That's a deal breaker for me.

spending time, paying attention

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11-28-2017 10:01 AM  5 months agoPost 43
joeplumber1

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cincinnati ohio

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I don't know buy it may work just fine yes it has a few more bearings but no different than using a belt that can stretch and fail at a blink of an eye at least this is a hard part that should give an idea when there is an issue

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11-28-2017 11:44 AM  5 months agoPost 44
MOZENZ

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Denby Dale UK

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Like the idea of intermediate gear takes some of the weight of the clutch bearings. Never liked belt drive pain in the arse when cold weather, gear drive for me all the way.

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11-28-2017 01:30 PM  5 months agoPost 45
datidun

rrKey Veteran

N Ireland

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Hope the 600 looks as good.

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11-28-2017 01:58 PM  5 months agoPost 46
joeplumber1

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cincinnati ohio

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I myself was sceptical at first but the more I look at it I don't think it's a problem at all definitely not a deal breaker I believe I will be buying

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11-28-2017 02:08 PM  5 months agoPost 47
Richardmid1

rrProfessor

Leeds, England

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My only concern is how quickly the gears will wear and what they cost to replace when they do!

Also that's a lot of bearings spinning at close to engine rpm!

60% of the time, it works every time!

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11-28-2017 04:13 PM  5 months agoPost 48
knightofcarnage

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chicago

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11-28-2017 05:43 PM  5 months agoPost 49
ICUR1-2

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Ottawa, Ontario

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Well as soon as normal people have it. With in a few months we will know if those extra gears are trouble. I'll wait and see

spending time, paying attention

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11-28-2017 06:17 PM  5 months agoPost 50
Richardmid1

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Leeds, England

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.To get the c of g right for direct servo to swash all they had to do is make a larger main and pinion gear so the motor sat further forward, this would also mean they could put the tank directly under the main shaft so no c of g change throughout the flight. Judging by the look of the main gear and where the tank is they haven't done this which is a shame.
They must have read my post, they just didn't want a huge main gear which would mean an ugly fat canopy (cough Synergy N7, Gaui nx7)!

60% of the time, it works every time!

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11-28-2017 11:28 PM  5 months agoPost 51
ICUR1-2

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Ottawa, Ontario

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They must have read my post, they just didn't want a huge main gear which would mean an ugly fat canopy (cough Synergy N7, Gaui nx7)!
but but couldn't they have done with just one extra gear


if CG was what they were after
my corrections to this frame would be flipping the aileron servos around.

moving the tail servo forward a bit more.

make the clutch assembly a little beefier for the extra weight
maybe using 1 gear instead of 2

I do like the position of the fuel tank
and the way the moved the motor forward with the larger heat sink mount.

spending time, paying attention

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11-29-2017 12:16 AM  5 months agoPost 52
joeplumber1

rrNovice

cincinnati ohio

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Bearings are very inexpensive the gears are made of metal, I think it will provide a lot of flights prior to replacement my dfc nitro is about three years old now I've gone through two engines and only just now replaced a couple of bearings and this thing has a gazillion flights on it. Hey nobody ever thinks twice about a transmission in your car and there is hundreds of moving parts in it,bearings, friction plates "fiber and steel" oh and yes gears that take a massive amount of abuse everyday they are driven

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11-29-2017 12:50 AM  5 months agoPost 53
ICUR1-2

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Ottawa, Ontario

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joeplumber1
Hey nobody ever thinks twice about a transmission in your car and there is hundreds of moving parts in it,bearings, friction plates "fiber and steel" oh and yes gears that take a massive amount of abuse everyday they are driven
Cars don't fly and helicopters don't need extra weight.
All they had to do was move the cg forward

spending time, paying attention

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11-29-2017 01:36 AM  5 months agoPost 54
buburub

rrApprentice

Bayside, NY

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The original Trex 700N had a final gear ratio of 8.2. The newer Trex 700 DFC has a gear ratio of 8.0 to allow for higher headspeed or keep the same headspeed and allow the engine to operate in a stronger portion of it's power band. The gear ratio of this new 700XN is back to 8.23. I wonder why they went back to that ratio? I also wonder if the transmission will give the motor some kind of mechanical advantage and allow for more torque during demanding maneuvers?

Goblin 700 KSE, Align 700X, Align 700N, Align 500X

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11-29-2017 10:14 AM  5 months agoPost 55
joeplumber1

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cincinnati ohio

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You're right cars don't fly and the amount of weight they added to this thing with the extra parts you will probably never notice! I have my money ready and when it hits I will pull the trigger. I for one am not scared of this design I think it's awesome, everything I own is align so keep up the good work!

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11-29-2017 11:35 AM  5 months agoPost 56
Richardmid1

rrProfessor

Leeds, England

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The gear ratio of this new 700XN is back to 8.23. I wonder why they went back to that ratio?
Is it just me or are the 2 gears next to the pinion gear bigger than the pinion gear? If the pinion is 13T and the main is 107T then that is 8.23 ratio BUT IF those two gears are larger then that changes the ratio doesn't it??

Edit: Sorry it doesn't change the ratio, just worked it out! Silly me!

Maybe they went for that ratio so it can run their 720mm blades? It does mean more torque so you won't have as high initial head speed but it will hold it better.

60% of the time, it works every time!

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11-29-2017 11:42 AM  5 months agoPost 57
Richardmid1

rrProfessor

Leeds, England

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Hey nobody ever thinks twice about a transmission in your car and there is hundreds of moving parts in it,bearings, friction plates "fiber and steel" oh and yes gears that take a massive amount of abuse everyday they are driven
That's in a sealed case running in oil though!

60% of the time, it works every time!

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11-29-2017 02:18 PM  5 months agoPost 58
joeplumber1

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cincinnati ohio

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Honestly the way I intended not to start an argument just how I feel that people are over analysing it. It's a simple design and it works. I'm one to follow the k.i.s.s rule when it comes to these things and align does a fine job at it! As soon as they release it I will have one at the house I will run a 105 in it so the extremely small amount of weight the extra gearing/parts will bring is going to be out done by the weight of the motor so I will never know anyway nor do I even care

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11-29-2017 09:15 PM  5 months agoPost 59
knightofcarnage

rrElite Veteran

chicago

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They must have read my post, they just didn't want a huge main gear which would mean an ugly fat canopy (cough Synergy N7, Gaui nx7)!
You are correct they made the transition gear to keep it slim and for GC. Also they did not want to go with a belt. I don't blame them on the belt that is another thing to worry about and make sure its tension correctly. I would not worry about oiling the bearings, Nitros by nature self oil the entire heli =P.

Personally I would love to stick YS 120 in it. It sad that hatori stop producing pipes for 105 and 120.

But anyways no nitro from me anymore =(.

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11-30-2017 02:23 PM  5 months agoPost 60
Richardmid1

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Leeds, England

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I wonder if Align will do a pipe for the 105?

60% of the time, it works every time!

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HelicopterAlignT-REX 700XN News  700NX!!!
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