RunRyder RC
WATCH
 1 page 1030 views POST REPLY
HomeAircraftHelicopterCentury Radikal G20-30 N640 Hawk Predator › Hawk IV swash plate mixing type for DX8
10-11-2010 07:16 PM  8 years agoPost 1
calvarez

rrNovice

Gilbert, AZ

My Posts: All  Forum  Topic

I recently bought a well-used Hawk IV and have rebuilt it, along with adding a DX8 radio/telemetry system and a GY401 gyro/servo kit. I'm new to helicopters so I've barely had it off the ground, but the expert at the LHS hovered it successfully. He thought it "felt right" but I have one open question I haven't been able to find the answer to. The DX8 has a setting for swash plate type so it can mix properly, but I can't find the type for the Hawk. Anyone know? The options are:

1 Servo Normal
2 Servos 180 degrees
3 Servos 90 degrees
3 Servos 120 degrees
3 Servos 135 degrees
3 Servos 140 degrees

It's been fun reading all the posts in this forum, and I've learned a lot.

PM  EMAIL  HOMEPAGE  Attn:RR  Quote
10-11-2010 07:36 PM  8 years agoPost 2
MikeInMobile

rrElite Veteran

Mobile, Alabama

My Posts: All  Forum  Topic

1 Servo Normal

PM  EMAIL  GALLERY  Attn:RR  Quote
10-11-2010 08:40 PM  8 years agoPost 3
Gearhead

rrMaster

Vt

My Posts: All  Forum  Topic

calvarez, just a suggestion here,

if you are using a "standard 50oz" servo on the Collective it's OK for hovering, but I would suggest to use something a bit stronger once in Forward Flight,,

good luck and ask anything you need to know about your Hawk, we will be happy to help !!

Jim
Buzz Buzz Buzz

PM  EMAIL  GALLERY  Attn:RR  Quote
10-11-2010 11:49 PM  8 years agoPost 4
calvarez

rrNovice

Gilbert, AZ

My Posts: All  Forum  Topic

Thanks guys. Glad you brought up servos, that's on my mind also. The t/r is using the servo that comes in a kit with the GY401, so I assume that's all set. The others are JR NES-507s and I don't know anything about them. The throttle servo has a lot of slop in the shaft and should be replaced. Is there any reason not to use a brand new S3003 I have laying around? I know it's slow and weak, does that matter for throttle for a newbie?

Carlos, Gilbert AZ

PM  EMAIL  HOMEPAGE  Attn:RR  Quote
10-12-2010 03:20 AM  8 years agoPost 5
Gearhead

rrMaster

Vt

My Posts: All  Forum  Topic

the S3003 has 44oz of torque,

yes you can use the S3003 on the Throttle,,

""JR NES-507s""
like I said, once you start using the Collective more replace it with a more powerful servo..

Jim
Buzz Buzz Buzz

PM  EMAIL  GALLERY  Attn:RR  Quote
10-12-2010 03:52 AM  8 years agoPost 6
motorhead540

rrApprentice

eaglecreek,oregon - USA

My Posts: All  Forum  Topic

hey jim i am just breaking in a new os 37 in a hawk pro and seen your note about servos i am using the spectrum servos from a dx 7 radio kit on all except for the rudder beleive they are ds821 are they strong enough or should i find something better to use . my older hawk pro has futaba 3151 digitals they seem ok but i do notice when decending and starting to stabilize the decent seems sluggish is that due to a weak servo not bogging the motor or losing head speed

wife says if i'm going to be an addict at least its to a heli

PM  EMAIL  GALLERY  Attn:RR  Quote
10-14-2010 05:43 PM  8 years agoPost 7
calvarez

rrNovice

Gilbert, AZ

My Posts: All  Forum  Topic

I put the 3003 into throttle duty, and it seems to be fine. I set it up so it gets the quickest throw possible, and turned down the travel on my controller (DX8). I think this should be good since the throttle needs very little torque.

The NES-507 that was on the throttle has a lot of slop. Another one of them has a little slop. Are they worth rebuilding, or just replace them?

Carlos, Gilbert AZ

PM  EMAIL  HOMEPAGE  Attn:RR  Quote
10-14-2010 06:21 PM  8 years agoPost 8
MikeInMobile

rrElite Veteran

Mobile, Alabama

My Posts: All  Forum  Topic

If you can move the servo's ball in instead of reducing the travel in the transmitter, you will get a more precise throttle response! Also, as an added bonus, you will get a little more torque on the throttle servo due to the ball being closer to the center of the horn! You should ALWAYS try to have the transmitter's travel as close to maximum as possible!

PM  EMAIL  GALLERY  Attn:RR  Quote
10-14-2010 06:33 PM  8 years agoPost 9
calvarez

rrNovice

Gilbert, AZ

My Posts: All  Forum  Topic

I may be wrong, but my logic in doing it this way was to speed up the throw. The 3003 is very slow. I understand that ideally I'd use faster servos for this bird, but I'm just learning to fly it and trying to minimize the expense. I had the 3003 sitting around. I realize that I lose precision and torque going this way. Is the precision more important than the speed?

Carlos, Gilbert AZ

PM  EMAIL  HOMEPAGE  Attn:RR  Quote
10-14-2010 07:55 PM  8 years agoPost 10
MikeInMobile

rrElite Veteran

Mobile, Alabama

My Posts: All  Forum  Topic

The speed of the throttle servo is NOT critical since you are limited by the response of the engine anyway!

The radio has a distinct number of steps that relate to the Full throw. When you reduce the travel, you reduce the number of positions available to the servo. For the throttle servo, the speed is NEVER important because the response for the engine is SO SLOW!

PM  EMAIL  GALLERY  Attn:RR  Quote
10-14-2010 07:58 PM  8 years agoPost 11
calvarez

rrNovice

Gilbert, AZ

My Posts: All  Forum  Topic

Thanks Mike, great point. I'll move the ball so the throw is more even.

Carlos, Gilbert AZ

PM  EMAIL  HOMEPAGE  Attn:RR  Quote
10-14-2010 08:15 PM  8 years agoPost 12
MikeInMobile

rrElite Veteran

Mobile, Alabama

My Posts: All  Forum  Topic

I always try to hit above 100$ travel on the throttle servo

PM  EMAIL  GALLERY  Attn:RR  Quote
WATCH
 1 page 1030 views POST REPLY
HomeAircraftHelicopterCentury Radikal G20-30 N640 Hawk Predator › Hawk IV swash plate mixing type for DX8
 Print TOPIC  Make Suggestion 

 3  Topic Subscribe

Tuesday, December 11 - 1:14 pm - Copyright © 2000-2018 RunRyder   EMAILEnable Cookies

The RC discussion world needs to consolidate. RR is now one choice for that. Its software is cutting edge. It hosts on-topic advertising. Help RR increase traffic buy making suggestions, posting in RR's new areas (sites) and by spreading the word.

The RunRyder Difference

• Category system to allow Rep/Vendor postings.
• Classifieds with sold (hidden) category.
• Classifieds with separate view new.
• Answer PMs offsite via email reply.
• Member gallery photos with advanced scripting.
• Gallery photo viewer integrated into postings.
• Highly refined search with advanced back end.
• Hosts its own high end fast response servers.
• Hosts thousands of HD event coverage videos.
• Rewrote entire code base with latest technology.
• No off-topic (annoying) click bait advertising.
Login Here
 New Subscriptions 
 Buddies Online