RE: crop duster r/c

RE: crop duster r/c
View related threads: (in this forum | in all forums)

Logged in as Guest

Users viewing this topic: none

Printable Version

All Forums >> RC Airplanes >> RC Scale Aircraft >> RE: crop duster r/c

Page: << < prev 40 41 42 [43] 44 45 46 47 48 49 next > >>

Login

Message

<< Older Topic Newer Topic >>

RE: crop duster r/c - 6/13/2008 7:57:27 PM

swixtt

Posts: 427
Joined: 1/19/2005
From: , BC, CANADA
Status: offline

wow, that is some setup!! i will need a bigger bird than my at502 to pack it!

very good work Thrush... your planes are remarkable!

(in reply to Thrushdust)

Post #: 1051

RE: crop duster r/c - 6/13/2008 8:52:32 PM

OldScaleGuy

Posts: 772
Joined: 12/19/2005
From: Seymour, IN, USA
Status: offline

Very interesting Dave. You have obviously done a lot of development work to come up with a system that works well. Thank you for sharing all of this information.

_____________________________

The difference between a good model and a great model is sandpaper.
www.LeisureRcModels.com

(in reply to swixtt)

Post #: 1052

RE: crop duster r/c - 6/14/2008 3:36:05 AM

mnoodle

Posts: 17
Joined: 3/20/2008
From: La Grande, OR, USA
Status: offline

That is just amazing Thrushdust. Great looking plane. Thanks again for sharing it with us.

(in reply to OldScaleGuy)

Post #: 1053

RE: crop duster r/c - 6/15/2008 5:46:26 PM

WLJ

Posts: 414
Joined: 1/2/2002
From: Enfield, NC, USA
Status: offline

quote:

ORIGINAL: Thrushdust

I'm using a modified Kobalt portable CO2 regulating system for pneumatic tools from Lowe's item # 166441 http://www.lowes.com/lowes/lkn?action=productList&N=0&Ntk=i_products&Ntt=CO2 with their 9 oz (net weight-17oz gross) tanks #184295 in combination with 4 "medium" Robart air tanks in my current set-up. I removed two "large" Robart tanks from the old system that had a total of 6 but still had a net gain of over a pound when "loaded". I do have more air than dust capacity now and I also have a more consistent rate than before rather than a big burst on the first pass and lighter trails on the second pass.
WLJ and I are planning to do a build thread for an RC Guys Agwagon when his arrives in which I'll include some new shots of my setup shown several times earlier in this thread. I haven't seen the smaller H9 Pawnee in person yet but I had a working system in a much smaller version of my Thrush ~10 years ago, maybe we can work something out.

David

I've got it, just don't have time to work on it right now. Billy J. (WLJ)

(in reply to Thrushdust)

Post #: 1054

RE: crop duster r/c - 6/17/2008 6:00:31 AM

Thrushdust

Posts: 129
Joined: 4/24/2002
From: Northeastern, NC, USA
Status: offline

In response to some of the PM questions I have received:

The dust reservoir has to be strong enough to withstand the full pressure in the event that either the dust valve doesn't open for some reason or the booms become clogged when the air valve is turned on. I actually tested mine outside the airplane (and the workshop) to make sure it would withstand the pressure with the dust valve in the off position.

A 20oz or similar soda bottle could work for both the air (2+) and the dust but the "filler" cap is pretty small for the dust and I have felt them EXPLODE and seen an AT-6 literately blown apart at Top Gun when a compressor was left unattended, estimated pressure 200+ PSI at the time of fracture!

The holes in the bottom of the boom, where my "spray" actually comes out, get progressively larger towards the tip as do the orifices on the full scale to create a more even pattern as the pressure decreases as the spray medium travels out the booms. I'll check and see what I'm using at each end but it will depend on your system's flow capability and swath for what you will need.

Yes, those spray holes are on the wrong end of the scale nozzles, you need to make a left and right not just keep drilling holes to do it right, but you can't see that when its flying by down the runway, and my "newer" ones are correct.
I drill holes for each of the molded nozzles to be ZAPped into also, they are screwed on to threaded nipples on the full scale subject.

DH

(in reply to WLJ)

Post #: 1055

RE: crop duster r/c - 6/17/2008 1:41:55 PM

hangar_9flyer

Posts: 5
Joined: 6/17/2008
From: newcastle, ON, CANADA
Status: offline

i am looking for an agro crop duster arf/kit/plans. i would preferable like the kit that you are able to put a large high power radial engine on the front. i saw it at the top gun but have know idea were i can get the plans from.

(in reply to hopt)

Post #: 1056

RE: crop duster r/c - 6/17/2008 2:27:50 PM

Thrushdust

Posts: 129
Joined: 4/24/2002
From: Northeastern, NC, USA
Status: offline

The Rockwell Thrush S2R-600 at Top Gun '08 in Masters class was mine, 108" ws and 28lbs, but it only has a Saito 1.80 on it, not a high powered radial. The other eight cylinders are molded plastic and filled with lead for balancing. Sorry plans nor kits are available for this one.

There was a smaller Air Tractor flying in the Pro-AM class (doing aerobatics for some reason - rolls and loops???) that may have been one of Duane Habet's kits

There is a large 501 Air Tractor kit build over in the Giant Scale section,
http://www.rcuniverse.com/forum/m_6605661/anchors_6605661/mpage_1/key_Air%252Ctractor/anchor/tm.htm#660566
but that's a turbine powered airframe. There are several other radial engine versions of the full scale Air Tractors, maybe you could convert that kit or the kit provider may have a radial version to offer too.

D. Hayes

< Message edited by Thrushdust -- 6/17/2008 2:30:21 PM >

(in reply to hangar_9flyer)

Post #: 1057

RE: crop duster r/c - 6/19/2008 2:35:08 AM

hangar_9flyer

Posts: 5
Joined: 6/17/2008
From: newcastle, ON, CANADA
Status: offline

if there are no plans available for the one with the saito 1.80 radial, how do you get it? build it from scratch i assume?

(in reply to hopt)

Post #: 1058

RE: crop duster r/c - 6/19/2008 2:38:29 AM

hangar_9flyer

Posts: 5
Joined: 6/17/2008
From: newcastle, ON, CANADA
Status: offline

thrushdust, would you be willing to sell or suggest what i can do to get one very similar or exact to yours? i love this plane and would be honoured to fly it

thanks a bunch.

(in reply to hopt)

Post #: 1059

RE: crop duster r/c - 6/19/2008 4:44:00 AM

bgfireman

Posts: 208
Joined: 10/28/2004
From: Dudley, NC, USA
Status: offline

Dave,
Not to get off of the current subject, but are you anywhere close to the beach fire? I hope not. And we hope to see you in Goldsboro on July 19 if you are off.
Thanks Alan

_____________________________

Romans 3:23,
For all have sinned and come short of the glory of God.

(in reply to hangar_9flyer)

Post #: 1060

RE: crop duster r/c - 6/19/2008 5:19:12 AM

Thrushdust

Posts: 129
Joined: 4/24/2002
From: Northeastern, NC, USA
Status: offline

Yep, built it myself, don't need no stinking drawings for that! ;-) Not ones that anybody else can understand anyway, just a few sketches, the T.L.A.R. and the K.I.S.S. principles and about 12 weeks working 60-80 hrs a week in two 6 week periods. Then a couple of weeks of "clean-up" before each major competition. I did have about 25 years of model building and 12 yrs of experience working on the full scale and knew what it needed to look like. Also, I didn't have the spray system working the first year at Top Gun '03.
It is my own design and there is no way I'd have the time or the desire to spend the time it would take to produce sale able drawings. I tried to get some done of my smaller version (82" ws) 10+ yrs ago and could never work out all the bugs. Of the 5 prototypes that other folks were building to test the plans, none were ever completed and flown for various reasons. I fly it in Masters and Designer classes so it must be designed and built by me. It's not for sale. Although, I guess there's a price for just about anything so you can PM an offer, but consider its history because I do! As mentioned earlier on this thread and others, RC Guys from Canada and Austars are both working on ARF Cessna spray planes about the same size.

bgfireman, No, thank goodness, we get some smoke once in a while but we're @ I-95, 9 miles south of VA border. Not looking good for the your fly-in, wrong weekend I think, sorry!

D.Hayes

(in reply to bgfireman)

Post #: 1061

RE: crop duster r/c - 6/19/2008 10:01:15 PM

twin3d

Posts: 62
Joined: 8/28/2006
From: Blacklick, OH, USA
Status: offline

Are you anywhere near Littleton NC? My Parents live there, I grew up in Creedmoore NC Lived there for 10 Years.

(in reply to Thrushdust)

Post #: 1062

RE: crop duster r/c - 6/19/2008 10:11:36 PM

Thrushdust

Posts: 129
Joined: 4/24/2002
From: Northeastern, NC, USA
Status: offline

Roanoke Rapids, NC. about 15 miles east since August 1980. I grew up in Raleigh NC, then 2 yrs of school in Goldsboro NC.
Fred, the owner of the full scale Thrush used to say "Welcome to RR, it ain't the end of the world, but you can see it from here!"

< Message edited by Thrushdust -- 6/19/2008 10:16:46 PM >

(in reply to twin3d)

Post #: 1063

RE: crop duster r/c - 6/20/2008 12:08:33 AM

hangar_9flyer

Posts: 5
Joined: 6/17/2008
From: newcastle, ON, CANADA
Status: offline

hey, like i said i would love to own this plane, give anything. I have been searching for a long while and when i finally saw it in the Rc news magazene, wow! o just cant believe i actually ran into the owner! pretty much name your price i will pay it!

(in reply to hopt)

Post #: 1064

RE: crop duster r/c - 6/20/2008 12:10:40 AM

hangar_9flyer

Posts: 5
Joined: 6/17/2008
From: newcastle, ON, CANADA
Status: offline

or better... if you were to sell it...how much do you think? make some profit on it! lol

(in reply to hangar_9flyer)

Post #: 1065