RE: 1/8 scale functional Hamilton Standard hub for RCV SP engines.  
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RE: 1/8 scale functional Hamilton Standard hub for... - 4/25/2008 4:43:26 AM   
Adonis


 

Posts: 33
Joined: 5/18/2007
From: ., ID, USA
Status: offline 		Josh thanks for all of your work on this project, from your design work to your meticulous testing to make sure it runs perfect. I’m very excited to get this thing mounted on a very scale Corsair, a Royal/Marutaka of course! Like I said it makes me want to cut the engine mounts off of my current Corsair! I thought it looked good in the air as it is, but with that prop it is going to look awesome!

(in reply to Juice)
       Post #: 126

RE: 1/8 scale functional Hamilton Standard hub fo... - 4/25/2008 7:33:54 PM   
HellcatAce


 

Posts: 151
Joined: 9/27/2005
From: Castaic, CA, USA
Status: offline 		IT"S ALIVE!!!! Great work Josh! Guess I gotta go buy an RCV now!

Just to clarify, was that test with a 90 SP or the 120SP?

< Message edited by HellcatAce -- 4/25/2008 7:35:37 PM >

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Fly scale planes scale...really, it looks better.

(in reply to Adonis)
       Post #: 127

RE: 1/8 scale functional Hamilton Standard hub fo... - 4/25/2008 7:38:16 PM   
Juice



Posts: 827
Joined: 2/12/2002
From: Richmond Hill, ON, CANADA
Status: online 		Ace... That was with a 90SP.

I'll be doing more tests this weekend to get some RPM numbers for common diameter/pitch settings.

Josh

(in reply to HellcatAce)
       Post #: 128

RE: 1/8 scale functional Hamilton Standard hub fo... - 5/2/2008 5:08:38 AM   
Juice



Posts: 827
Joined: 2/12/2002
From: Richmond Hill, ON, CANADA
Status: online 		RPM Test #1

[I don't trust my results. They were too good to be true. I'll post RPM numbers again on a later date.]

< Message edited by Juice -- 5/2/2008 6:31:44 PM >

(in reply to Juice)
       Post #: 129

RE: 1/8 scale functional Hamilton Standard hub fo... - 5/2/2008 5:52:39 AM   
grinder-RCU



Posts: 566
Joined: 2/18/2003
From: London, ON,
Status: offline 		Looking good Juice. The 90 has lots of torque to swing that big 3 blader around. Maybe the bigger prop ( more mass ) is having a greater flywheel effect making those rpm's possible. On the 90sp the max rpm is 5500 is it not?. I would think you would do most flying around about half throttle with the 90sp and H9 corsair. Can't wait to get that 3 blade hub on my son's Corsair and try her out. Keep up the good work. So all I need to order from Solo is the 3 blades, extension nut. With the blades being flat black not glossy. Did you ask for the scale profile blades?.

Joe.

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(in reply to Juice)
       Post #: 130

RE: 1/8 scale functional Hamilton Standard hub fo... - 5/2/2008 4:27:48 PM   
Joe Lott


 

Posts: 39
Joined: 12/13/2007
From: Killen, AL, USA
Status: offline 		Wow! I was preparing to buy a 120SP. Now I'm going to have to rethink that move. One question, Josh. Does your tach have a button or switch to go from 2 blade readings to 3 blade readings? If you were reading for a 2 blade prop with a 3 blade attached, that would explain the high RPM. I know that's a dumb question but I had to ask.

(in reply to grinder-RCU)
       Post #: 131

RE: 1/8 scale functional Hamilton Standard hub fo... - 5/2/2008 6:41:18 PM   
Juice



Posts: 827
Joined: 2/12/2002
From: Richmond Hill, ON, CANADA
Status: online 		Joe...

I'm glad you asked, because I think that's what happened (measuring RPM of 3 blades on 2 blade setting). It was cold, and it was drizzling rain very lightly at times, and I was rushing to beat the sunset. In the rush, I probably just forgot to set the tach to 3-blades. You know, the simplest explainations make the most sense.

I feel like a bonehead right now.

Josh

< Message edited by Juice -- 5/2/2008 9:45:38 PM >

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       Post #: 132

RE: 1/8 scale functional Hamilton Standard hub fo... - 5/2/2008 10:24:56 PM   
Juice



Posts: 827
Joined: 2/12/2002
From: Richmond Hill, ON, CANADA
Status: online 		Joe...

Props and an extension nut. Yes, that's what you'll need from Soloprops.

They have two order forms.

1) From the one titled "Solo Props Secure Order Form", you'll order three or more "Round Tip Blades". I still have to do RPM tests to determine if 16" or 18" blades are best. In the comments section near the bottom, you should specify "Flat black. Corsair round tips".

2) From the one titled "Solo Props Replacement Part Order Form (Secure)", you'll order Part Number 45624 (Extension Nut & Washer, 5/16"x24). Later he'll combine the two orders and charge for shipping only once.

I have an idea to save everyone some money in shipping charges. Everyone places their own orders for props and extension nuts with Soloprops... and pays for it. Carl with then combine all the orders into one shipment sent to me. I'll pay for the shipping charges and divide the cost by the number of people involved and add it to your bill. Then I'll re-pack your props and extension nut along with my hub and a Tru-Turn dome spinner and ship you everything. This way everyone only pays for shipping once. And that one shipment to you will contain the complete prop/hub system, ready to assemble and mount. Does that make sense?

I gave Carl from Soloprops a heads up about your orders and this shipping idea. He said it won't be a problem on his side. Everyone: If you want to combine all your shipments, please respone to the thread with "YAY". Otherwise, say "NAY".

Josh

(in reply to Juice)
       Post #: 133

RE: 1/8 scale functional Hamilton Standard hub fo... - 5/3/2008 4:34:13 AM   
grinder-RCU



Posts: 566
Joined: 2/18/2003
From: London, ON,
Status: offline 		"YAY"

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       Post #: 134

RE: 1/8 scale functional Hamilton Standard hub fo... - 5/3/2008 3:16:05 PM   
Adonis


 

Posts: 33
Joined: 5/18/2007
From: ., ID, USA
Status: offline 		"YAY"

That prop is all I need to complete these pictures!

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(in reply to Juice)
       Post #: 135

RE: 1/8 scale functional Hamilton Standard hub fo... - 5/4/2008 1:46:06 AM   
Joe Lott


 

Posts: 39
Joined: 12/13/2007
From: Killen, AL, USA
Status: offline 		Yay. I'm in.

(in reply to Adonis)
       Post #: 136

RE: 1/8 scale functional Hamilton Standard hub fo... - 5/4/2008 1:59:26 AM   
tony-howard


 

Posts: 273
Joined: 9/28/2004
From: Monroe, WA, USA
Status: offline 		A YAY from me too.



< Message edited by tony-howard -- 5/4/2008 2:00:12 AM >

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Tony
pacific-scaled-aircraft.com

(in reply to Juice)
       Post #: 137

RE: 1/8 scale functional Hamilton Standard hub fo... - 5/4/2008 2:56:08 AM   
ed_mustafa


 

Posts: 1
Joined: 11/17/2007
From: las vegas, NV, USA
Status: offline 		yay here too!

(in reply to tony-howard)
       Post #: 138

RE: 1/8 scale functional Hamilton Standard hub fo... - 5/4/2008 10:22:13 PM   
Skaweee


 

Posts: 15
Joined: 3/23/2005
From: Stafford, VA, USA
Status: offline 		Can I climb aboard too? Just stumbled across this thread. I had contacted the folks at Solo-Prop about two weeks ago to ask about a 1/8th scale prop hub, they said not at this time. This seems too good to be true!

(in reply to ed_mustafa)
       Post #: 139

RE: 1/8 scale functional Hamilton Standard hub fo... - 5/5/2008 4:34:12 AM   
Juice



Posts: 827
Joined: 2/12/2002
From: Richmond Hill, ON, CANADA
Status: online 		Skaweee... You are welcome to join. I can still add to the order, but only for a short while longer. Read over the thread and keep an eye one the details such as cost, weight and approprite engines.

Josh

(in reply to Skaweee)
       Post #: 140

RE: 1/8 scale functional Hamilton Standard hub fo... - 5/5/2008 5:21:47 AM   
Juice



Posts: 827
Joined: 2/12/2002
From: Richmond Hill, ON, CANADA
Status: online 		RPM Test #2

Engine: RCV 90SP
Fuel: Red Max 10% nitro, 7% caster, 14% total oil content.

1) MAS 18x12x2 5280 RPM
2) APC 15.75x13x3, 5300 RPM
3) 1/8 Hub 18x13x3, 3840 RPM
4) 1/8 Hub 18x11x3, 4400 RPM
5) 1/8 Hub 18x10x3, 4450 RPM
6) 1/8 Hub 16x13x3, 4760 RPM
7) 1/8 Hub 16x12x3, 4960 RPM
8) 1/8 Hub 16x11x3, 5200 RPM

The extra 4 oz of the hub does have an negative effect on max RPM. And I had hoped that I can fly with the 18" props. But from these RPM numbers the 90SP doesn't have enough to spin it above 5000 RPM.

It looks like I'll be flying with the 16" blades set to 11" pitch. I hope to make the flight on either Thursday night or sometime next weekend.

I may also buy different fuel next time also. I actually don't like the Red Max fuel I used for this RPM test, because both of my RCV engines could never idle well with it. I had been using a special fuel