Saito 82 throttle - RCCanada - Canada Radio Controlled Hobby Forum
RCCanada - Canada's Radio Control Hobby Forum
Engines Discuss engines

Reply
 
Thread Tools Display Modes
Old 09-29-2016, 05:23 PM   #1
Lieutenant Dan
RCC Apprentice
 
I am: Stanley P
Join Date: May 2016
Location: Guelph Ontario
Radio of choice:
Graupner MZ 24
# of RCs: 20

Feedback: 1 / 100%
Posts: 29
Total Props: 0
Saito 82 throttle


       Remove this ad - become a site supporter!
I swapped out my 46 in my twist for a Saito 4 stroke 82 I rotated the carb and still had issues with throttle linkage. I didnt want to change to a longer engine mount for clearance and used this flex line with the fitting shown in picture which works really well. I stiffened the end as well by soldering the inner cable lightly as well. Most my aircraft have the typical u end my question is has any body else used a similiar setup? I did try a steel rod and bent it into a semi rectangle to bring it out and rearward to the throttle arm but seemed a little sloppy. Also seen the 4 stroke throttle kits but they seem a little over engineered imo.
Attached Thumbnails
Click image for larger version

Name:	20160928_200802.jpg
Views:	96
Size:	595.5 KB
ID:	1063185  
Lieutenant Dan is offline   Quick reply to this message.

Sponsored Links - Subscribe to remove this ad.
Old 09-29-2016, 05:54 PM   #2
Cougar429
Level 3 Supporter
★ Site Supporter ★
 
Cougar429's Avatar
 
I am: Gary L
Join Date: Aug 2008
Location: Tecumseh, Ontario

Feedback: 75 / 100%
Posts: 5,537
Total Props: 35
Re: Saito 82 throttle

I have been using cable-in-tube for years. Since not a critical flight component rigid linkage is not required.

Even so, if the cable fits smoothly in the tube there is little or no slop. Also, you are able to route the run to avoid obstructions such as tanks or flight packs, something no solid setup could accommodate. Any number of smooth bends add no drag.

Having said that could not use that rig for the Skybolt due to the tank size and location. Ran the tube through the firewall as close as possible, then milled a flat in the mount for the bellcrank. From there a spare heli linkage connected to the throttle arm.

The tube is the same I use for fuel lines, identical in O.D. to brass or alloy supplied with the tanks. I.D. is slightly smaller, but have never found that to be a problem, even up to a Saito 150. The cable is available at any hardware store and is flexible enough to work with little drag. Using solder to harden an unsupported length is one solution. I have wicked in thin CA for the same purpose. At the same time I CA on a nylon clevis to connect to the throttle arm. You don't want any metal-to-metal contact, especially one that can carry RF behind the firewall.

ps. My son plays guitar, so along with the aircraft cable I have used the larger diameter strings within the tube. They are flexible and stiff enough not to require solder or CA.
Attached Thumbnails
Click image for larger version

Name:	DSCF0582.JPG
Views:	50
Size:	1.08 MB
ID:	1063209   Click image for larger version

Name:	DSCF0755.jpg
Views:	45
Size:	811.1 KB
ID:	1063217   Click image for larger version

Name:	DigitalCameraTransfer 903.jpg
Views:	44
Size:	743.2 KB
ID:	1063233  
__________________
I know there's money in aviation........I put it there!

Last edited by Cougar429; 09-29-2016 at 06:00 PM.
Cougar429 is offline   Quick reply to this message.
Old 09-29-2016, 07:57 PM   #3
Lieutenant Dan
RCC Apprentice
 
I am: Stanley P
Join Date: May 2016
Location: Guelph Ontario
Radio of choice:
Graupner MZ 24
# of RCs: 20

Feedback: 1 / 100%
Posts: 29
Total Props: 0
Re: Saito 82 throttle

Great info thanks and yes the cable is arranged in such a way that the fuel tank is nicely installed easier than the plastic rod installation...
Lieutenant Dan is offline   Quick reply to this message.
 
Old 09-30-2016, 07:20 AM   #4
Cougar429
Level 3 Supporter
★ Site Supporter ★
 
Cougar429's Avatar
 
I am: Gary L
Join Date: Aug 2008
Location: Tecumseh, Ontario

Feedback: 75 / 100%
Posts: 5,537
Total Props: 35
Re: Saito 82 throttle

Should have added a couple pieces of info.

I currently get my plastic tube from a pneumatic supplier, but it should be available at any pet store selling fresh and saltwater fish gear as it's used for their aeration systems. Set up an aquarium for the family back in the 80's and this is where I originally came up with the idea to use it for fuel tubing.

With careful heating it can be formed to follow the inside of a tank or route within an engine compartment. It is also flexible enough to allow for installation and removal without damage. This is impossible for brass or alloy.

Also, forgot to mention the rigidity of the piano strings limits the size of the bend radius. Too tight and the drag can go up a lot.

ps. I have enough practice to be able to heat and free bend the tubing, (yet can still make a hash of it) but you can help prevent collapse by having aircraft cable inside during the process. Just try to heat the area SLOWLY and keep it in the shape required until fully cooled and set.
Attached Thumbnails
Click image for larger version

Name:	DSCF0122.jpg
Views:	33
Size:	598.5 KB
ID:	1063665  
__________________
I know there's money in aviation........I put it there!
Cougar429 is offline   Quick reply to this message.
Old 09-30-2016, 09:32 AM   #5
waynepinke
RCC Junior Contributor
 
waynepinke's Avatar
 
I am: Wayne Pinke
Join Date: Jul 2007
Location: LASALLE, ONTARIO
Radio of choice:
Futaba & Hitec

Feedback: 22 / 100%
Posts: 208
Total Props: 5
Re: Saito 82 throttle

I have used this set-up for 4 strokes when space is limited at the firewall. I used an old bellcrank or a long servo arm to create a lever action and allow the steel throttle wire to be clear of the fuel tank.
Attached Thumbnails
Click image for larger version

Name:	Saito 91 Throttle Linkage 002.jpg
Views:	29
Size:	140.3 KB
ID:	1063761   Click image for larger version

Name:	Saito 91 Throttle Linkage 003.jpg
Views:	26
Size:	144.2 KB
ID:	1063769   Click image for larger version

Name:	Saito 91 Throttle Linkage 004.jpg
Views:	23
Size:	141.3 KB
ID:	1063777   Click image for larger version

Name:	Saito 91 Throttle Linkage 005.jpg
Views:	26
Size:	154.4 KB
ID:	1063785  

__________________
Wayne Pinke
MAAC #8730
Sun Parlor RC Flyers (Windsor, Ont)
waynepinke is offline   Quick reply to this message.
Old 09-30-2016, 11:47 AM   #6
Cougar429
Level 3 Supporter
★ Site Supporter ★
 
Cougar429's Avatar
 
I am: Gary L
Join Date: Aug 2008
Location: Tecumseh, Ontario

Feedback: 75 / 100%
Posts: 5,537
Total Props: 35
Re: Saito 82 throttle

DuBro makes something similar, but theirs has the linkages on the same side:

http://shop.dubro.com/p/4-stroke-thr...kage-qty-pkg-1
__________________
I know there's money in aviation........I put it there!
Cougar429 is offline   Quick reply to this message.
Old 09-30-2016, 06:17 PM   #7
Lieutenant Dan
RCC Apprentice
 
I am: Stanley P
Join Date: May 2016
Location: Guelph Ontario
Radio of choice:
Graupner MZ 24
# of RCs: 20

Feedback: 1 / 100%
Posts: 29
Total Props: 0
Re: Saito 82 throttle

Yes I have 3 of those little Dubro kits, it wasnt going to work for me because the side fueslage at the mounts are very tight and I would not have been to put the bellcrank in unless of course the saw came out then no problem. that piano wire method looks very good too ...
Lieutenant Dan is offline   Quick reply to this message.
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the RCCanada - Canada Radio Controlled Hobby Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

Member names may only be composed of alpha-numeric characters. (A-Z and 0-9)

!!ATTENTION ADVERTISERS!! If you intend on advertising anything on this forum, whatsoever, you are required to first contact us here . Additionally, we do NOT allow BUSINESS NAMES unless you are an Authorized Vendor. If you own a business, and want to do sales on this site via posting or private message, you will need to follow the rules. Shops, Stores, Distributors, Group Buys without being authorized will see your account terminated.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
Your Name
Your first name and last initial is required if you plan on using the forum.
Location
Which city & province you live in. This is mandatory for classified listings.
Radio of choice?
Which radio is your current favorite to use?
Number of RC Vehicles?
How many boats, cars, planes do you own?

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
vBulletin Message

Thread Tools
Display Modes

Forum Jump


All times are GMT -5. The time now is 11:18 PM.


vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.