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HomeScaleAircraftHelicopterScale Model RC Helicopters Docs  Bell 407 Build
08-06-2011 02:58 PM  6 years agoPost 21
Phoenix NOTAR

rrApprentice

Tallahassee, Florida USA

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Work is progressing on the Marvelcraft Bell 407.

I got the operating side hatch door installed. This was quite finicky, as each the hinge is made from 7 small parts, and you need to make some properly located 1mm wide slots in the body to install the hinges. Overall it came out quite nicely, and works well. The hatch is needed to gain access to the mechanics to install the batteries, connect wires etc.

I also got the fins and tail cone attached. I used nylon screws with nuts to attach the vertical fin, just in case of a ground strike of the fin/stinger wire, I am hoping the screws will break and not the tail boom.
It is always interesting to cut out the opening for the tail output and pitch change in something like the tail cone, as it seems that you have to just keep cutting away, and cutting away, and cutting away material until everything fits AND you can get it mounted to the tail boom.

Sandy

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08-06-2011 03:14 PM  6 years agoPost 22
Phoenix NOTAR

rrApprentice

Tallahassee, Florida USA

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IT FLIES!

It still needs the windows installed and the decals applied (OK, and the interior installed!).

It seems to work very well.
I will need to revise the gearing to get the rotor rpm down a bit for this scale application (The donor Joker 2 was a 3D heli for me). It has plenty of power using an Actro 32-3 motor and 12S 5800 batteries. 10S would probably be fine, but 12S is what I use in my other helis.

Looking forward to IRCHA!

Sandy

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08-06-2011 05:31 PM  6 years agoPost 23
Mojave

rrElite Veteran

Palos Verdes, Ca. USA

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Looks great in the air! I like your idea of using nylon hardware to attach the vert fin. It might just save the part in the event of an oops...

All helis and planes have an expiration date stamped on them...you only find it after you crash!!

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08-06-2011 08:00 PM  6 years agoPost 24
Copter Doctor

rrProfessor

Enterprise/ft.rucker ,al- home of army aviation

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great idea on the nyIon screws Sandy!! i have aIways made my vert fins removabIe but never used the nyion screws. i wiII now.great Job on the buiId

drive a rotary, fly a rotorcraft

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08-06-2011 10:09 PM  6 years agoPost 25
marc28

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new york

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Lookin very nice sandy,what kind of flight times are you getting?

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08-07-2011 03:19 AM  6 years agoPost 26
doorman

rrProfessor

Sherwood, Arkansas

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All Right Sandy!!!!!
Looking good and glad you got it in the air.. it does look good (as do all you builds!!!!)... looking forward to seeing it up close and personal this coming week!!!!!

Stan

AMA 2918-Team Spin Blades,,Castle Creations, Unique Aircraft

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08-07-2011 04:11 AM  6 years agoPost 27
Phoenix NOTAR

rrApprentice

Tallahassee, Florida USA

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Marc,

I have no idea about the flight times yet. I did not have the pulleys needed to get the gearing low enough for a "scale like" look with 12S. I am shooting for 1350 - 1400 rotor rpm. When the Joker 2 was in 3D form I was running 2000+ rpm. So I had to switch to 10S (I had one set of (2x) 5S 6000 packs "in stock" ). I made a flight today with these packs, and I think that they will be fine, but I was messing around with throttle curves (an older Schulze Future 160-40H ESC) and the gyro, so it was not a "real" flight to get any meaningful flight time data.

Stan,

Thanks for the nice compliment, but this is a pre-painted kit, with almost everything done for you. My job was more or less just to assemble it without screwing up!

Mojave,

Thanks to Gerd Guzicki of Minicopter for the nice picture of the heli's first flight. He stopped by my house and flying field on his way from Germany to IRCHA, and he was able to take some great pictures for me.

Sandy

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08-13-2011 04:03 AM  6 years agoPost 28
Phoenix NOTAR

rrApprentice

Tallahassee, Florida USA

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Works well, flies well!

I got the front six windows, and some of the stripping and decal installed prior to leaving for IRCHA.
I did installed one side window with the rubber molding, but then removed it when I realized the decal / stripping that came with this kit has stripes that pass through the side window openings. I needed to wrap the stripes into the pre-cut window opening, so the window molding needs to be installed after the stripes are applied.

I will add the pre-painted scale exhaust when I go flybarless, because with the under-slung flybar on the Joker 2, there is too great a probability that I would knock it off with the flybar when carrying it, or if the flybar is very tilted when I start the spool-up.

I have been flying for about 9 minutes at a time, and using 10S battery packs I have been typically putting about 3000mAh back into the packs.

Sandy

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08-13-2011 06:03 AM  6 years agoPost 29
seattle_helo

rrKey Veteran

Seattle, WA USA

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Looks great!

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12-14-2011 08:02 PM  6 years agoPost 30
sstewart

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Keller, TX - USA

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Any updated pictures of the 407 ? Thinking of startingone for my next project.

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12-14-2011 08:11 PM  6 years agoPost 31
Heli143

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Phenix City, Alabama

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Yes it does look good!!

I just received mine last week and am in search of 700 mechs to install in it.

I wish the tail rotor was on the correct side but I can live with it.

However, I intend to do something about the placement of the tail rotor as it is just too far forward of the tail cone for my taste.
Marvelcraft puts out beautiful fuses so hopefully they will provide a solution to this in future fuselages.

Roy Mayoral

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12-14-2011 10:51 PM  6 years agoPost 32
Phoenix NOTAR

rrApprentice

Tallahassee, Florida USA

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Here are a couple of new images of my Marvelcraft Bell 407, now with a 4 blade head from Helicoptermanufaktur (type M003). It flies really, really well with this head using Radix 690mm blades and NO stabilization at all.

I have also installed a C.C. HV ICE2 80amp ECS. The spool-up is nice, and the head speed is perfect (1450 rpm).

Sandy

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12-15-2011 02:21 PM  6 years agoPost 33
Mojave

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Palos Verdes, Ca. USA

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That looks great and you have a flying field that I would kill for SoCal is such a crowded place...
Barry

All helis and planes have an expiration date stamped on them...you only find it after you crash!!

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12-15-2011 07:17 PM  6 years agoPost 34
Phoenix NOTAR

rrApprentice

Tallahassee, Florida USA

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Barry,

It is a nice field. But the downside (depending on your point of view) is that we share this runway with full size aircraft. It is a privately owned airport with small aircraft (Pipers, Ultra-lites, Gyrocopters, gliders, etc.) using the runway. So there are often times when we must quickly land, or wait before taking off, so that the full size craft can take off or land. For some strange reason they get priority over the R/C planes and helis

Sandy

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12-15-2011 11:12 PM  6 years agoPost 35
sstewart

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Keller, TX - USA

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Looks good with the 4 blade rotor system. Have you since installed the side windows ?

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12-16-2011 08:13 PM  6 years agoPost 36
Phoenix NOTAR

rrApprentice

Tallahassee, Florida USA

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sstewart,

Hmmm, the windows........

I WANT to put them in a make the heli look even better...

But the current situation is still that since I am using the Joker 2 mechanics, and keeping the batteries in the standard location within the side frames, I need to put my hands into the windows to strap-in, and to connect the two 6S battery packs.

So I would need to make the window moldings work in a manner that would allow me to easily "pop" them in and out for each flight. The side windows have been pre-trimmed by Marvel Craft to work properly with their supplied moldings, and have the moldings / windows mounted permanently (or at least semi-permanently).

So the short answer is No, the windows are not in yet. But I fly this heli often enough that I am (for now) Ok with the look of the 407 in the air without the side windows.

Sandy

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12-16-2011 10:26 PM  6 years agoPost 37
sstewart

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Keller, TX - USA

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I am going to have the same issue I'm affraid with my 206. I should be installing the mechs soon, so I will have to wait and see.

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12-16-2011 11:22 PM  6 years agoPost 38
CARLOS LUIS

rrApprentice

Maracaibo-Venezuela

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Looks awesome!!!

Carlos Arrieta .......The Scale Helicopters are the Best

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12-16-2011 11:22 PM  6 years agoPost 39
Mojave

rrElite Veteran

Palos Verdes, Ca. USA

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For e-power this fuse would be so much better with opening doors or a break open nose. That's one reason why I chose not to buy one. I have big hands and not a whole lot of patience
Barry

All helis and planes have an expiration date stamped on them...you only find it after you crash!!

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12-17-2011 01:51 AM  6 years agoPost 40
Phoenix NOTAR

rrApprentice

Tallahassee, Florida USA

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Mojave,

I agree about bigger openings on an E-power fuse.

This Marvel Craft Bell 407 was designed around a T-Rex 700 nitro, and
does have an opening / functional rear cargo hatch. I use this hatch to insert and remove the battery packs.
If I wanted to, I could have the ESC wires feed to the rear, and connect the batteries through this hatch opening. Assuming I found a better method than the velcro straps to retain the batteries into the mechanics.

Sandy

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