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Home✈️Aircraft🚁Helicoptere-AlignT-REX 700 › DFC head 5th flight boom strike
03-26-2012 07:30 AM  7 years ago
Sam2b

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Tacoma, WA

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The answer is:

If both models have the same main shaft with the DFC head, YES the distances will be the same. One main shaft is a "3G" main shaft, and one is not. Check the part specifications for the length of each

There is no "700n shaft" and "700E shaft".
_Sam B_
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03-26-2012 08:01 AM  7 years ago
Terrabit

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Seattle, WA - USA

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One benefit of the dfc head is the fact that the shaft is designed to accommodate the third main bearing. This was one of my primary attractions. With my stock v2 kit, I noticed slop in the main bearings - I could rock the head fore and aft. Others have made the same observation, including Casey. I tried other bearings, shafts, the KDE extension but none were effective for me. I am noticing now that there is less slop with all three bearings engaged using the dfc shaft.
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03-26-2012 08:17 AM  7 years ago
Crash549

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Raleigh NC

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So....

The answer is:
If both models have the same main shaft with the DFC head, YES the distances will be the same. One main shaft is a "3G" main shaft, and one is not. Check the part specifications for the length of each
There is no "700n shaft" and "700E shaft".
_Sam B_
Flybarless since 2008 [quote]

So it's the same distance to the top of the top bearing block because the main gear in the same position on both models therefore driving the umbrella gearset to drive the torque tube in the same position, both models E AND N?
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03-26-2012 02:26 PM  7 years ago
rudyy

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E. Amherst, NY

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I will stay away from the DFC head. The probability to have this happened should be nil.
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03-27-2012 12:06 AM  7 years ago
Sam2b

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Tacoma, WA

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Crash,
a bit over complicated, but if the main shafts are the same, then all the rest must be true as you've stated. Browse the mainshafts part numbers for yourself and do due dilligence personally if this is such an important issue. http://www.align.com.tw
the main gear in the same position on both models... therefore driving the umbrella gearset to drive the torque tube in the same position
Note: I just learned there is a third main shaft released:
700DFC Main Shaft
"http://www.readyheli.com/H70089-700...9389.html";
_Sam B_
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03-27-2012 12:07 AM  7 years ago
Sam2b

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Tacoma, WA

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Terrabit,
interesting there's a new mainshaft with the DFC head upgrade kit.
I am noticing now that there is less slop with all three bearings engaged using the dfc shaft.
I too have that slop you talk about, but I wonder what adverse effect it would have in the air? So far my main bearings are smooth. Or maybe that is what's causing the non-rigid feeling? Hmmm, got me thinking.
_Sam B_
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03-27-2012 05:40 AM  7 years ago
Terrabit

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Seattle, WA - USA

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It made for a very spight shutter in direction changes. I probably wouldn't have noticed. As you are aware, I'm not that great of a pilot. Casey was the one who noticed it in flight. His style is precise and subtle. I think it took that and a lower headspeed (1900) to make it apparent.
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03-28-2012 12:46 AM  7 years ago
Crash549

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Raleigh NC

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Sam2b,

I don't believe my question was understood immediately.

The answer is both the 700N and 700E equipped with DFC Head Upgrade have an equal chance of a boom strike. The main blades are no further from the boom on the 700N based on the fact that all three mainshafts have the same distance from maingear bolt hole to upper bearing collar.
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03-28-2012 05:43 AM  7 years ago
Terrabit

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Seattle, WA - USA

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... Except that many 700e pilots are running higher headspeeds than 700n pilots which produce greater centrepital force (mv^2/r). This added force works against blade flex reducing the probability of boomstrike.
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03-28-2012 01:38 PM  7 years ago
jetblue2135

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Atlanta, GA

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Hit the 200th flight today with the DFC head, all is good. Changed the dampeners out after the first 100, installing the KBDD dampeners.Align I Team Futaba I Thunder Power I
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03-28-2012 06:37 PM  7 years ago
3dgimble

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Rochester

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WOW, 200 flights with out a crash? What kind of flying do you do?
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03-28-2012 06:41 PM  7 years ago
rudyy

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E. Amherst, NY

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I think it is possible if there is no unexpected electronic and mechanical failure and you just fly in the comfort zone without trying new stuff.
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03-28-2012 07:47 PM  7 years ago
jetblue2135

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Atlanta, GA

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no had a bad crash 2 weeks ago (mechanical malfunction), rekit basically...back up and running. Flying hard 3D.Align I Team Futaba I Thunder Power I
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03-30-2012 03:26 AM  7 years ago
paulpeffly

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Knightdale, NC US

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wow jetblue, 200 flights! how many flights a week? Wish I had time to go out that much!Team HeliDirect
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03-30-2012 05:29 AM  7 years ago
jetblue2135

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Atlanta, GA

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I put about 10-15 flights a day on my off days, I'm off about half the month on average. I am lucky enough to be able to fly near my house and with 5 sets of packs and the charging capability to charge lipos in 10-12 minutes it allows me to fly back to back all day long. That and my wife doesn't mind, I am very fortunate. I was able to get in 37 flights the past 3 days I've been off from work, so that's it for the week.Align I Team Futaba I Thunder Power I
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03-30-2012 05:57 AM  7 years ago
paulpeffly

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Knightdale, NC US

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wow thats a lot of flight time. Im lucky to get in 10 on the weekend Team HeliDirect
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04-04-2012 02:24 AM  7 years ago
504RonerrKey Veteran - New Orleans, LA. -
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Watch at YouTube

boom shocka locka
NO FLYBARS
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04-04-2012 02:30 AM  7 years ago
paulpeffly

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Knightdale, NC US

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yeah just watched that. what a bummer! I would be sooo pissed!Team HeliDirect
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04-04-2012 02:49 AM  7 years ago
504Rone

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New Orleans, LA.

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Me too! Thats worst than the gear stripping bs last yr.NO FLYBARS
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04-04-2012 03:00 AM  7 years ago
rudyy

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E. Amherst, NY

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A buddy of mine has the DFC bolt sheared off yesterday. This was the second time happening to him. He is switching back to the original head.
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Home✈️Aircraft🚁Helicoptere-AlignT-REX 700 › DFC head 5th flight boom strike
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