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  #1  
Old 04-01-2009, 09:21 AM
slow8 slow8 is offline
 
Join Date: Mar 2009
Location: UT, USA
Posts: 2
Default Info on Rocket II and III

What are the differences between the Rocket II and III?

Are they both based on the -4?

Sorry for the simplistic questions but the Rocket site is pretty scrambled.
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  #2  
Old 04-01-2009, 11:45 AM
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longranger longranger is offline
 
Join Date: Mar 2007
Location: 45G, Brighton, MI
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Go to http://www.harmonrocket.com/ and click on SPECS, or HRII&III, and you'll get a table with HRII spces in black and HRIII specs in red. The main difference, of course, is that the HRII is two-seat, and the HRIII is single seat.
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RV-7 TU 904KM (reserved)
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SB Fuselage Just Past QB Stage


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  #3  
Old 04-01-2009, 12:41 PM
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miyu1975 miyu1975 is offline
 
Join Date: Apr 2008
Location: Indianapolis, IN
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HRII Fast....HRIII Faster..
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RV 7 N324TP IO 360 A1A
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  #4  
Old 04-01-2009, 02:29 PM
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Jeff Brenhaug Jeff Brenhaug is offline
 
Join Date: Dec 2007
Location: Minnesota
Posts: 94
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Go to www.harmonrocket3.com and see the only flying HR3 thus far. Although a few of them are close to being airborne.
Jeff
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  #5  
Old 04-01-2009, 09:13 PM
SteinAir SteinAir is offline
 
Join Date: Feb 2005
Location: Minneapolis
Posts: 2,439
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Jim's not too far away with his HRIII at LVN. He picked up a bunch of electronic goodies this week, so it won't be too long until you'll have a flying partner here in Minnesota that can keep up with you!

Cheers,
Stein
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  #6  
Old 04-02-2009, 06:42 PM
Jeff Brenhaug's Avatar
Jeff Brenhaug Jeff Brenhaug is offline
 
Join Date: Dec 2007
Location: Minnesota
Posts: 94
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Hey Stein,
Keep the pressure on Jim to git 'er done. I'm heading overseas for a few months and want to see some progress when I get back.
Jeff
p.s. NO, you can't fly it while I'm gone.
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  #7  
Old 04-03-2009, 08:04 AM
dlithgow dlithgow is offline
 
Join Date: Mar 2009
Location: Jacksonville, AR
Posts: 6
Default Scrambled

It is pretty scrambled.

The basic difference is:

HR2 is a two seater based on a widened RV-4 fuselage in the front seat. Back seat RV-4 size. This adds (help me here) about 6 inches width up front. I believe it still uses the RV-4 canopy. Wings are clipped vs. RV-4 and more ribs are added. Many skins are increased to 0.040 thickness.

HR3 is a single seater flown from what was formerly the rear seat. Still based on the RV-4, but NOT widened. Uses special canopy. Wings are clipped even more than HR2 and another rib is added. Skins same as HR2.

The higher speed is from the narrower fuselage and shorter span. Empendage is stock RV-4 with the 0.020 skins substituted for 0.016 like the later kits.

When I build mine, I'm thinking to build a HR4 -- 2 place, narrow body, flown from the rear with the higher performance engine. Seems the best of all worlds. I like the idea of a removable auxillary fuel tank, too, that will swap in for the front seat for extended high speed cruise. Have also toyed with idea of being able to switch back and forth between two place and single place canopies. What the heck ?

Hope I got all of that right. Feel free to correct anything that's wrong guys.

Final thought. It's definitely not a "kit". Harmon's "plans" are definitely not Van's level quality. You build this thing; not assemble it.
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  #8  
Old 04-03-2009, 11:07 AM
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longranger longranger is offline
 
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Location: 45G, Brighton, MI
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dlithgow,

All that sounds good except that HRII front 'pit is only 4" wider than RV-4. Because of that, the canopy is wider, too.
__________________
Miles (VAF# 1238, Paid up as of 12/2016)
RV-7 TU 904KM (reserved)
Wings Structurally Complete!!
SB Fuselage Just Past QB Stage


Construction Log
Picasa: Empennage Album, Wings Album, Fuselage Album


1955 Cessna 170B flying since 1982


'To get something you never had, you have to do something you never did.' -Unk.
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  #9  
Old 04-12-2009, 04:28 PM
Floridagator Floridagator is offline
 
Join Date: Jan 2007
Location: Waterford, MI
Posts: 18
Default Harmon Rocket III Plans

If anyone is seriously considering building a Harmon Rocket III, I have a set of plans for sale in the VAF Classifieds:

http://www.vansairforce.com/communit...ad.php?t=42190

$100 shipped to US address
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  #10  
Old 04-26-2009, 06:22 PM
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smokyray smokyray is offline
 
Join Date: Jan 2005
Location: TX32
Posts: 1,629
Default Size matters

Guys,

The HR2 by far is the best cockpit setup of any of the RV's I have flown. It is 4" wider at the shoulders than the RV4, which is alot. However comma, it is much wider at the panel and has much more "total" room up front than the 4 or the 8. Having spent 5 years building and 10 years flying a -4, the HR2 cockpit is vast (very similar in size to the F-16) and has much better visibility than the 4.
All of the previous posts are accurate, but they don't stress how fun, fast and efficient the HR2 is compared to ANY airplane, much less an RV. This week I flew alongside many of my RV SNF visitor friends and forgot how amazing the HR2 is...

Simply put, it Rocks!

Smokey
HR2
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