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HomeAircraftHelicopterAerial Photography and Video › Is it time for a 450 front mount?
03-05-2008 04:12 AM  10 years agoPost 1
iflybyu77

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Fort Wayne, IN

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Guess so! Eat your heart out, Maxi Joker/Trex 600's!

Always thought it would be fun to try on a 450. Technically it works well, and is lighter than the underslung I was using. Some creativity is required to get CG right (especially with that HEAVY WA lens), and I modified things substantially to do so. Too bad I can't get something that does good video too.

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03-05-2008 04:25 AM  10 years agoPost 2
rroback

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Irvine (UCI), Ca

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Alright, let's see you put a 5d on it :P Looks good, but I'm amazed you can c.g, let alone fly it!

Rhett..... I can't fly, but the Profi sure can.

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03-05-2008 06:04 AM  10 years agoPost 3
jascamera

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san francisco, ca

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Have quite a bit of experience with the 450. first, your t-rex looks great. Only things that I will change is lighter camera under 180grams and shorten the boom for the mount, thought it stick a bit far, which in my experience will affect the 450's performance and try keeping 450 under 1050 to 1,100g, I fine that is the best weight, not too heavy and not too light. I believe there are few brands out there have 28mm wide angle lens camera that are are quite light. I have a lot of luck with the Nikon L12, both for video and still photos, but lens is only 35mm. Here is a sample video that I make in HK, which I have posted here before, but added a few clips and music in case you want to know what the little t-rex can do.

http://jasonlamphotography.com/video/hkrr.mpg

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03-05-2008 07:16 AM  10 years agoPost 4
Shortman

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Portland, Oregon

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Hats off to you! Thats a small heli, I can't believe it lifts a camera that size!

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03-05-2008 01:16 PM  10 years agoPost 5
500Driver

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Burlington, IA

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Nice. (are you missing a screw for the servo arm?)

I've been working on a front mount too for a 450 and extended the battery tray out the back.

When it's flying I'll take some pictures.

Your's is really clean...nice job.

When in doubt...auto out

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03-05-2008 01:17 PM  10 years agoPost 6
500Driver

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Burlington, IA

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PS - What blades are you using?

When in doubt...auto out

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03-05-2008 01:19 PM  10 years agoPost 7
Seablade

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earth

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Nice job!
A Nuemotor 1105 is said to run cooler and less battery drain on a 450.
Tried to order one, but mfg. takes too long to make them!

I'd definitely put some cooling fins on the align motor.

I would also find a way to mount the ESC vertically so that the cooling fins are inline with the downwash off the rotor, might give it better cooling. also trim the heat shrink all around the base so that it does not act as a fairing to guide the cooling airflow away from the fins.

Since you now have a safer place to mount the gyro under the forward supports what about moving it there to avoid the dreaded paddle strike in a crash?

Just things I would do yours looks good and is working for you

"Vini, Vidi, Velcro"

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03-05-2008 02:17 PM  10 years agoPost 8
iflybyu77

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Fort Wayne, IN

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Yes, it easily will pick this camera up. Not Rhett's 5D, but hey, that's life. I was maybe an ounce or more heavier with the last setup. It wasn't RTF when I took the pic (and no, it wasn't Nooobs quality photography! )

Getting the CG isn't as hard as I imagined, and only requires some deliberate placement of components. The addition of new Evo Lite 2500mah packs helps too, as they are a touch heavier.

I haven't investigated any power upgrades (yet) as this system has run without a hiccup (yeah, that knock on wood thing comes in here) for over 100 AP sorties.

The blades are Rotortechs. I have a set of 350's on the way to play with too. The things that surprises me most is I've done a lot of searching on RR and elsewhere for people doing 450 stretches, and found little or no information! What an appropriate thing I think to do on a good platform, and no one has done it? Well, here we go..

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03-05-2008 04:15 PM  10 years agoPost 9
jascamera

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san francisco, ca

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I find hacker 20-6XL are very reliable motor. I used about a year for 3d flying and another year for ap flying. It runs pretty cool for AP, get about 5 minutes with 1050g t-rex, on 2100mah

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03-05-2008 05:12 PM  10 years agoPost 10
iflybyu77

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Fort Wayne, IN

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Butter. It flies, and that is the best word for it compared to underslung. No tendencies to oscillate like it used to, and just sits there. It was even a bit gusty, and for a 450 it just tolerated it well.

I tried out a 11 tooth pinion for the first few flights. The headspeed sounds low of course, and punch outs are probably going to be questionable, especially as the packs get down on voltage. I may try a 12 tooth or return to the 13 if need be. I really like the lower headspeed for stability though.

And please, no jokes about the white stuff in the pictures. That four letter word s**w fell again last night to the tune of 6 inches with ice. Did I mention I'm a fan of global warming?

EDIT: The reason for putting the gyro back up top was to allow room for the battery if I took off the glass on the front. That way the battery can be slid forward up to the motor. Space constraints didn't allow for the battery AND gyro occupying the same space.

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03-05-2008 05:58 PM  10 years agoPost 11
Seablade

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earth

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Yeah...I know your hard pressed to find space on the airframe.
I was thinking you could try the gyro just forward of your front servo underneath the two arms for the camera mount.
I think I saw two holes for fasteners in the airframe where it slopes downward you might be able to make a mounting pad for it?

I noticed you didn't have any boom supports. Is there any flexing of the boom with the rudder servo all the way aft? (good idea for the servo!)

"Vini, Vidi, Velcro"

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03-05-2008 06:05 PM  10 years agoPost 12
iflybyu77

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Fort Wayne, IN

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That carbon boom is gonna snap before it flexes! The tail servo isn't heavy either, and the thing doesn't do 3D, so I'm not concerned. I MAY put some on there if I stretch it a few millimeters to fit the 350's. I'm waiting to fit them first before I get concerned about the main/tail blade overlap. I'd REALLY have to crank on it to get it to hit. So far, I think I can get away with the stock boom and a longer belt and squeeze out the extra few mm to get the appropriate clearances.

Good idea on the front mounting of the gyro, however keeping the weight aft IS the key. That camera aint no featherweight.

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03-05-2008 07:00 PM  10 years agoPost 13
Seablade

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earth

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ya gotta try them new helium filled lenses!

"Vini, Vidi, Velcro"

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03-05-2008 07:17 PM  10 years agoPost 14
500Driver

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Burlington, IA

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That really is a nice set-up. I see the battery extension 'tray' now...my camera is not quite as heavy...but that looks great.

I agree...mounting the tail servo aft on the boom is really nice too.

Are the 350's made by RotorTech? I've heard rumors of 350 blades but never found them

When in doubt...auto out

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03-05-2008 07:19 PM  10 years agoPost 15
500Driver

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Burlington, IA

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Just noticed you doubled up on flybar weights too. Are you finding that to be helpful?

When in doubt...auto out

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03-05-2008 11:13 PM  10 years agoPost 16
iflybyu77

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Fort Wayne, IN

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Unknown how much it really effects it. I ran one set before. I don't think it's a ton. I could still do piroflips, tic-tocs etc on the deck with one set. That of course was before it was a front mount!

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03-05-2008 11:43 PM  10 years agoPost 17
KarbonBird

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Australia

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I find hacker 20-6XL
I have had excellent success with this motor - great for AP!

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03-06-2008 04:19 PM  10 years agoPost 18
iflybyu77

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Fort Wayne, IN

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I'll have to order one. Wonder what difference it is to say a Scorpion?

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03-06-2008 05:20 PM  10 years agoPost 19
jascamera

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san francisco, ca

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Here is where you can get a pair of 350mm.

http://www.helidirect.com/product_i...roducts_id=5926

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03-06-2008 05:21 PM  10 years agoPost 20
iflybyu77

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Fort Wayne, IN

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Mine just came in today - same ones.

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HomeAircraftHelicopterAerial Photography and Video › Is it time for a 450 front mount?
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