Bert Kammerer T-Rex 450 Pro (Pics & Video)

simplelifee

四月中旬才上市, 估计得5月大陆上架吧
说是他看过jason设计的最好的一架飞机
很简约，零件很少
和500的琐尾效果很相像，而且更加有利于升级马达



When Jason first showed me some of the initial drawings of his new T-Rex 450 design last year while on a trip together, my first impressions were very positive. However, I honestly thought that some of the design features were not going to be made possible during the prototype stages. Well, I was wrong! The prototype came out exactly as the drawings showed. I received a pre-production version a few days ago and I am extremely impressed with this little heli.
This is by far the lowest part count helicopter I have ever built. These features stood out from the first time I saw the drawings:

• Single side frame design with a very low parts count
• Single piece bearing block and servo mount
• Single piece anti-rotation guide and gyro mount
• Single piece landing gear with only two bolts attaching it to the frames
• Single piece battery and speed control mount that keeps CG closer to the disk
• Torque tube driven tail
• Weighed tail rotor blade grips (Chinese weights built in)

This is in my personal opinion Jason’s best design ever. Flying wise, this heli feels very light in the air, the power-to-weight ratio is incredible. It is also extremely precise due to its servo layout and rigidity combined with a very “beefy” head and ball links that fit like a “glove”. The heli also tracks exceptionally well for a machine this size and its tail feels so locked in that it can be compared with the tail fee of a T-Rex 500. For those of you who would want to upgrade the motor in the future, you can get away with ridiculous head speeds due to its low tail gear ratio of 4.24:1.
Expect the new T-Rex 450 Pro to be released around mid April.

Some info and pics:

http://www.bertrc.com/heli_videos/bert_kammerer_450pro-1.wmv

http://www.bertrc.com/archives/144

[ 本帖最后由 simplelifee 于 2009-3-16 14:08 编辑 ]

garfieldhummer

简洁  轴传不错  不过估计不便宜 直接上大机了

小拖鞋

:em07:

unicorn18

:em13:

simplelifee

3200了 价钱已经出来了

jamesndsc

3200是套装还是裸体？

simplelifee

套装 要裸体那还了得了:em01:

炸机之王

好贵:em25:

飘渺神域

:em01:

hazy

算下来空机2000左右，还行了

aotsuki

电池大肚子了。。。。:em17:

wxyh

等便宜再考虑

lzmars

价格好高啊

zet

期待

o0小凯0o

不便宜啊

betmanofbmw

Weighed tail rotor blade grips (Chinese weights built in)
这一句没看明白是什么意思！在介绍图片里不是这么说的，BERT说的“内嵌中国重量”不知道啥意思

simplelifee

应该是在原有的基础上把 尾旋翼爪 加重

黄瓜哪有苦瓜爽

:em10:

zhx318

原帖由 <i>betmanofbmw</i> 于 2009-3-17 12:59 发表 <a href="http://bbs.5imx.com/bbs/redirect.php?goto=findpost&pid=3682630&ptid=283867" target="_blank"><img src="http://bbs.5imx.com/bbs/images/common/back.gif" border="0" onclick="zoom(this)" onload="attachimg(this, 'load')" alt="" /></a><br />
Weighed tail rotor blade grips (Chinese weights built in)<br />
这一句没看明白是什么意思！在介绍图片里不是这么说的，BERT说的“内嵌中国重量”不知道啥意思

<br />
按我的理解:chinese weight是指尾桨夹在尾桨螺丝附近的配重，此配重有利于增强运动时的锁尾效果。

betmanofbmw

还是老外热情，基本上还是有问必答。LS说的基本上是对的，但不完全对。
不知道自己翻译是否正确：
尾旋翼控制臂因为随尾旋翼组一起转动，也会产生离心力，这个额外的力会把尾桨往中立点拉，造成“网球拍效应”。为了减小这种效应，可以在桨夹处增加额外的重量，而且重量分布要离桨夹的离心力轴有一定距离（效果才明显，所以不管是哪种形式，都会是突起的形式），这个增加的重量叫CHINESE WEITHT！这在真实的直升机中也存在，可能是某个中国人发明的小方法，因而得名！

[ 本帖最后由 betmanofbmw 于 2009-3-19 00:06 编辑 ]