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  #641  
Old 10-27-2020, 04:29 PM
David Paule David Paule is offline
 
Join Date: Dec 2009
Location: Boulder, CO
Posts: 4,595
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There are excellent folding wing designs for cantilevered low-wing designs. Look at U.S. WW II carrier aircraft for examples. Pull a pin or flip a lever and push the wing back.

As I mentioned above, the RV-12 has better visibility than any, repeat any, of the high-wing aircraft that I've flown, and I've flown a bunch of them. So it can quite clearly be accomplished. Still, if you really want good visibility, the engine can't be in your line of sight, although the RV-12 does a pretty decent job of making that a non-factor.

I'll add ease of entry and exit, since that's a valid point.

Personally, I wouldn't expect that Van's would have a 120 mph kit for sale unless it were something to broaden their entry into the LSA market, such as tandem or taildragger RV-12 derivative. The sort of airplane that's been debated in this thread accepts those speeds but probably would not be in that current weight class. As has been pointed out, there's a lot of competition is that Supercub class. If it came from Van's, I'd expect a faster cruise speed.

Dave
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  #642  
Old 10-27-2020, 10:58 PM
Captain Avgas Captain Avgas is offline
 
Join Date: Oct 2005
Location: Melbourne, Australia
Posts: 1,914
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Quote:
Originally Posted by PaulvS View Post
Add for high wing:

4. Easier to get into and out of, and load/unload.

5. Sit in the shade both in the air and outside on the ground.

6. Less risk of getting trapped upside down if it flips in a crash.

7. Ability to enter and exit the aircraft in heavy rain without getting drowned...or getting the interior soaked. An advantage not to be underestimated.

8. Vastly superior wing clearance in off-field or forced landings.

Personally I don't think a low wing aircraft ticks the crucial boxes for a bush plane. I would be very surprised if Vans would design such a folly.
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Last edited by Captain Avgas : 10-27-2020 at 11:15 PM.
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  #643  
Old 10-27-2020, 11:03 PM
gasman gasman is offline
 
Join Date: Mar 2007
Location: Sonoma County
Posts: 3,877
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Van's is sitting and waiting for the new LSA rules..............

Van, make it tall enough to walk under the wing and not get the Cessna forehead tattoo.
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Last edited by gasman : 10-27-2020 at 11:05 PM.
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  #644  
Old 10-28-2020, 01:10 AM
PilotjohnS PilotjohnS is offline
 
Join Date: Jan 2016
Location: Southwest
Posts: 1,232
Default Speed is key

Vans has a winner with the RV9 in the sense that is has a slow stall speed but a high cruise speed. I hope Vans doesnt change this total performance. But a tall gear is fine except if it slows the plane down, I would take the higher cruise and the “Cessna Stars” anyday. Just gotta learn to duck.
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WARNING! Information presented in this post is my opinion. All users of info have sole responsibility for determining accuracy or suitability for their use.

Dues paid 2021, worth every penny

RV9A- Status:
Tail 98% done
Wings 98% done
Fuselage Kit 98% done
Finishing Kit 35% canopy done for now
Electrical 35% in work
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  #645  
Old 10-28-2020, 08:27 PM
enterprise enterprise is offline
 
Join Date: Sep 2018
Location: Daytona Beach, FL
Posts: 30
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Quote:
Originally Posted by memberberries View Post
I'm not a fan of the Rotax 915 at 37k for 141hp at 186lbs. Thats big motor money for one that really doesn't do a whole lot more than say a UL350is at 22K for 130hp at 173lb. Unless you're at high DA and need the forced induction. Too spendy a powerplant for my budget.
The main advantage to the turbo is getting to keep that 141hp up to cruise altitude and having a fuel efficient motor when you get there. If we are comparing apples to apples with a RV-9 with a brand new IO-320, I don't think the cost delta will be that large.

The UL power engines are very impressive. When I picked the RV-12is project, the other choice for me was a Zenith 750 cruiser with the UL 350. I like the idea of a modern ECU controlled purpose built engine.
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  #646  
Old 11-05-2020, 02:40 AM
Scroggin Scroggin is offline
 
Join Date: Aug 2020
Location: Feilding New Zealand
Posts: 14
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Its got to be a metric plane😬 throws hand grenade and runs.
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  #647  
Old 11-05-2020, 06:05 AM
DeeCee 57's Avatar
DeeCee 57 DeeCee 57 is offline
 
Join Date: Sep 2018
Location: LSZF
Posts: 509
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John S, according to that table https://vansairforce.net/community/s...mparison+table speed ratio wise places the -9 in 3rd position...

-3B with 4.06
-4 with 3.93
-9 with 3.92
-8 with 3.81
Etc.

All those being taildraggers.
The worst of all, a nose dragger:
-12 with 2.96

As a personal note, I’m no fan of the -9, but having a speed ratio as large as possible for a future aircraft will always be a plus.
Looking at the history of Van’s models, the contrary is happening...
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Last edited by DeeCee 57 : 11-05-2020 at 06:07 AM.
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  #648  
Old 11-06-2020, 10:11 AM
RYOUNG RYOUNG is offline
 
Join Date: Feb 2010
Location: NC
Posts: 48
Default RV-8 Plus

Having just gone through the process of engine selection for my RV-8, I selected the IO-390 despite cons of weight, forward cg, etc,etc....however, I do not appear to be alone as others on this forum are also going through this process of engine selection. I just had an epiphany! What if Van’s developed an RV-8 “plus” kit to help offset some of the cons associated with using this engine. Maybe a shorter engine mount, cowl mods, other ways to move the cg aft that would restore the good handling of the O/IO-360 equipped 8’s. I am already making adjustments to help with cg like aft mounted battery, Sky Designs alum gear (saves 15 lbs), Hartzell composite prop (Saves 10-15 lbs), anything else that might help. I believe Van’s might have a market for this.
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  #649  
Old 11-06-2020, 10:17 PM
huse0054 huse0054 is online now
 
Join Date: Jul 2010
Location: Eagan, MN
Posts: 32
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Quote:
Originally Posted by RYOUNG View Post
Having just gone through the process of engine selection for my RV-8, I selected the IO-390 despite cons of weight, forward cg, etc,etc....however, I do not appear to be alone as others on this forum are also going through this process of engine selection. I just had an epiphany! What if Van’s developed an RV-8 “plus” kit to help offset some of the cons associated with using this engine. Maybe a shorter engine mount, cowl mods, other ways to move the cg aft that would restore the good handling of the O/IO-360 equipped 8’s. I am already making adjustments to help with cg like aft mounted battery, Sky Designs alum gear (saves 15 lbs), Hartzell composite prop (Saves 10-15 lbs), anything else that might help. I believe Van’s might have a market for this.
I would be first in line for this.
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  #650  
Old 11-19-2020, 10:18 AM
Moose8154 Moose8154 is offline
 
Join Date: Aug 2008
Location: New Castle Delaware
Posts: 6
Default UL Power

Quote:
Originally Posted by huse0054 View Post
I would be first in line for this.
Why not use the latest UL520 turbo - 220hp, IO-320 weight - what's not to like?
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