RE: Sundowner from Hangar 9

RE: Sundowner from Hangar 9
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RE: Sundowner from Hangar 9 - 1/8/2008 11:53:46 AM

teazers

Posts: 2
Joined: 7/4/2007
From: , SOUTH AFRICA
Status: offline

I like power in my planes thinking of putting a DA50 in mine any tips or recomendations for the instalation of it.
thanks(www.hein.marais@gmail.com)

(in reply to mfuess)

Post #: 151

RE: Sundowner from Hangar 9 - 1/8/2008 2:15:51 PM

mfuess

Posts: 402
Joined: 9/5/2002
From: Bedford, TX, USA
Status: offline

Bolt it straight up! Re-enforce your firewall. I added another layer of 1/8" plywood but this isn't really necessary but it's good practice for larger engines. Use large fender washers under the standoffs (on the firewall end). You can move your gas tank back if you like, again this isn't necessary. You will have to use the HEAVY rods in the stab & move your receiver battery pack to the rear hatch. This will provide you the correct balance, give or take a little. I didn't use my DA-50 because of the standoff requirements, but other people have. I prefer to have my engine sitting back in the proper hub location. No big deal though...

Move your throttle servo inside the fuselage for your DA and align it for a perfect line-of-sight for the linkage. You can also add a choke servo if you like.

(in reply to teazers)

Post #: 152

RE: Sundowner from Hangar 9 - 1/9/2008 1:05:03 PM

mfuess

Posts: 402
Joined: 9/5/2002
From: Bedford, TX, USA
Status: offline

quote:

ORIGINAL: teazers

I like power in my planes thinking of putting a DA50 in mine any tips or recomendations for the instalation of it.
thanks(www.hein.marais@gmail.com)

One thing I forgot to mention. This is purely optional but very much in your best interest. Use high-quality PINNED HINGES instead of CA hinges. Vibration generated from gassers really eats up those CA hinges after awhile. I have done this to every aircraft I installed a gas engine in.
Big Gas engine in a Sundowner

(in reply to teazers)

Post #: 153

RE: Sundowner from Hangar 9 - 1/10/2008 1:02:45 AM

senkbeil@knology.net

Posts: 68
Joined: 8/28/2002
From: West Point, GA, USA
Status: offline

hangar 9 came out with a new sundowner 50 it(in my opinion) looks better than the bigger one.

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(in reply to mfuess)

Post #: 154

RE: Sundowner from Hangar 9 - 1/10/2008 1:34:24 AM

RPool

Posts: 106
Joined: 8/10/2006
From: Euless, TX, USA
Status: offline

Thanks for sharing that...

(in reply to senkbeil@knology.net)

Post #: 155

RE: Sundowner from Hangar 9 - 1/10/2008 2:06:22 AM

CRG

Posts: 104
Joined: 6/1/2005
From: , CA, USA
Status: offline

Actually I agree. The only real difference apart from the size are the wheel pants and tailwheel. On my big Sundowner I used wheel pants from the H9 Cap 232, they match the blue on the wing and fuselage, and an Ohio R/C tailwheel. Looked very cool.

quote:

ORIGINAL: senkbeil@knology.net

hangar 9 came out with a new sundowner 50 it(in my opinion) looks better than the bigger one.

(in reply to senkbeil@knology.net)

Post #: 156

RE: Sundowner from Hangar 9 - 1/10/2008 3:33:15 AM

RPool

Posts: 106
Joined: 8/10/2006
From: Euless, TX, USA
Status: offline

Has anyone seen the 50 in person? Our club is talking about using the 50 size as a platform for some organized club racing. I don't have a problem with someone liking the looks of the 50. It just seemed an odd comment all by itself. Kind of like driving up in your brand new red car and your neighbor coming over and saying he likes blue better. It's ok...just different. There is a thread for the 50 sized Sundowner but I guess everyone is waiting for them to come in. MFuess (above) changed his wheelpants on the 80" too. If yours look as good as his do, you have to like that.

< Message edited by RPool -- 1/10/2008 3:42:11 AM >

(in reply to CRG)

Post #: 157

RE: Sundowner from Hangar 9 - 1/10/2008 11:24:28 AM

mfuess

Posts: 402
Joined: 9/5/2002
From: Bedford, TX, USA
Status: offline

quote:

ORIGINAL: RPool

Has anyone seen the 50 in person? Our club is talking about using the 50 size as a platform for some organized club racing. I don't have a problem with someone liking the looks of the 50. It just seemed an odd comment all by itself. Kind of like driving up in your brand new red car and your neighbor coming over and saying he likes blue better. It's ok...just different. There is a thread for the 50 sized Sundowner but I guess everyone is waiting for them to come in. MFuess (above) changed his wheelpants on the 80" too. If yours look as good as his do, you have to like that.

The Sundowner 50 comment is a little off the wall for this thread, but it is a Sundowner. If the little one flies as good as the big one, it's a winner. I did make "some" changes to my Sundowner like the wheel pants, and I added more color. I made more non-seen changes such as hinges, firewall re-enforcement, gas tank, tail-wheel, etc.. Our noise abatement issue at the field as cost me a lot of speed! I put a canister muffler on to keep the 50cc quiet and it slowed my airfraft down about 15 MPH. I'm going to "TRY" to over come this with props. None the less, I like the Sundowner! It's very stable for this type of aircraft, and it will do some limited aerobatics. I did a nice flat spin with it yesterday and it was very difficult to get it to pull out. I raced a guy that has a BME 50 powered Super Chipmunk, I lapped him every 3 laps. No surprize... I have 5 years of F1 (factory sponsored) racing experience and a better designed aircraft.

< Message edited by mfuess -- 1/10/2008 11:27:44 AM >

(in reply to RPool)

Post #: 158

RE: Sundowner from Hangar 9 - 1/11/2008 12:53:54 PM

mfuess

Posts: 402
Joined: 9/5/2002
From: Bedford, TX, USA
Status: offline

quote:

ORIGINAL: RPool

Mejzlik makes a 14.4 x 13 prop. How do you guys think that would work on the 26GT? What are the advantages of 2 and 3 blade props? Is one better than the other in the Sundowner's case?

This prop will probably be OK, if you are using a Tuned Pipe on your 26GT. You will likely be un-happy with the lack of thrust from a 14.4 diameter prop, especially with a 13+ pound aircraft. Only use two blade props. They are considerably more efficient especially on smaller two strokes, like a 26GT.

I have several 26GT engines all with modified tuned pipes. My best props are: Mejzlik 15x12, 16x8, and 16x10. With the 16x10 performing the best overall.

SEE my Pipe Mods: 26GT Pipt Mods

SEE my 26GT Review: Kick Ass Evolution 26GT

GOOD LUCK!

Mark

(in reply to RPool)

Post #: 159

RE: Sundowner from Hangar 9 - 1/11/2008 1:12:28 PM

mfuess

Posts: 402
Joined: 9/5/2002
From: Bedford, TX, USA
Status: offline

Using a stock Evolution 26GT II in a Sundowner is "marginal" at best, if you want to "go fast & turn left". It will fly the aircraft, and you might even like the slower lap times. But a Sundowner is much better served with a bigger displacement engine. I love my Evo 26GT engines... in the RIGHT AIRCRAFT, and the Sundowner just isn't it.

(in reply to mfuess)

Post #: 160

RE: Sundowner from Hangar 9 - 1/12/2008 1:28:06 PM

mfuess

Posts: 402
Joined: 9/5/2002
From: Bedford, TX, USA
Status: offline

quote:

ORIGINAL: Rebellion

As promised, here are a few pics. One thing I'm curious about, I noticed that the exhaust opening on the muffler is narrower than the exhaust port on the engine. Measured, it's almost exactly 1/8" narrower. That seems like it would rob performance a bit, or am I missing something? Also, no gasket was included. No big deal, but be aware you'll have to make your own.

The difference in opening size is nothing to lose sleep over, in this application. I have performed numerous case studies on this issue using various engines and the effect is insurmountable. If you were looking for every single RPM available from your engine, you wouldn't even be using this muffler. Or, any pitts style muffler for that matter! So bolt it on and enjoy your Sundowner.

(in reply to Rebellion)

Post #: 161

RE: Sundowner from Hangar 9 - 1/13/2008 4:47:00 PM

proptop

Posts: 4426
Joined: 10/18/2002
From: Rome, NY, USA
Status: offline

An ole flyin' buddy and I were talking about his Sundowner last night...
He has 3 engines that we are considering...
YS 1.40 Sport, the new YS 1.70, and a Saito 1.80

I'm leaning toward the YS 1.70, and wondering if anyone here has used it or any of the 3 that I've listed?

What prop would be good for a YS 1.70 for max speed? I'm thinking maybe something like a 15 X 14 or 16 X 12?

_____________________________

It's bad luck to be superstitious...
Revver Bro #77

(in reply to mfuess)

Post #: 162

RE: Sundowner from Hangar 9 - 1/13/2008 5:00:11 PM

mfuess

Posts: 402
Joined: 9/5/2002
From: Bedford, TX, USA
Status: offline

YS 1.70 would (by far) be the best choice of the options offered. That is a very high-torque engine and it will do best on a 16x16 APC prop (for a Sundowner). On a really good tune, you will see about 7600 RPM using YS 20/20 fuel. This will get you to about 115 MPH depending on how clean your airframe is.

< Message edited by mfuess -- 1/13/2008 5:02:47 PM >

(in reply to proptop)

Post #: 163

RE: Sundowner from Hangar 9 - 1/18/2008 3:37:38 PM

mfuess

Posts: 402
Joined: 9/5/2002
From: Bedford, TX, USA
Status: offline

quote:

ORIGINAL: bobzilla

I want to stick in my G-62 and set a new air speed record for straight-line course with an ARF! Is it possible with this plane?

It WON'T happen... PERIOD.

A G62 would be your worst choice. It won't spin up enough to get the kind of speed you are thinking about. And a Sundowner airframe is not clean enough, not to mention it won't support this engine without MAJOR work. You also wouldn't have prop ground clearance for a G62...

Bad idea all together...

(in reply to bobzilla)