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RE: CMP/GSP Spitfire - 6/3/2005 11:00:53 AM   
HenrikL


 

Posts: 7
Joined: 8/20/2004
From: SevenoaksKent, UNITED KINGDOM
Status: offline 		Congratulations, Edwin!
After reading your report of 2 successful flights, I can't wait to finish mine and get her in the air.

How is your setup? Two fairly experienced flyers in my club had severe problems with C of G/side thrust/down thrust in their CMP/GSP Spitfires.
Where in the 120-130 mm (4 3/4 - 5 1/8 inch ?) range from LE is your C of G?
Have you changed the down thrust or side thrust that is built into the fuselage?
What is your full elevator deflection?

I don't expect that the fairly small flaps will change the slow flight characteristics much, but I DO think they will increase the drag a fair bit, which will help you bleed off the energy which is needed if the approach on your flying field is a bit steep due to trees or other obstacles.

Regards,
Henrik.

(in reply to Dave03B)
       Post #: 101

RE: CMP/GSP Spitfire - 6/3/2005 1:43:44 PM   
Edwin


 

Posts: 3376
Joined: 2/8/2002
From: Leander, TX, USA
Status: offline 		I set CG at 4 7/8" from the leading edge at the fuse. No CG problems that I can think of. You DO have to balance it a little on takeoff but no different than any other I've flown. No side or down thrust changes. I used their wood block spacer. I think full deflection is around 5/8 to 3/4". We have a somewhat steep approach also. Power lines 500' off the north end of the run way. About 3 weeks ago I shreaded an 82" gasser thru them. Ruined the engine, was a ryobi so not a big financial loss. Rudder seems to be about 3/4" also. Thats all I could get out of it, but it seems like its enough. Ailerons are a little less than 3/4". Good roll rate, I LIKE IT! This is gonna be a good sport flyer. But that paint on the mylar covering isnt so good. It scuffs easy and chips off. Gonna be repainting it and sealing it after I get it flying like I want it. My buddy took some stills and will get them as soon as I can. I have one problem on my cowl installation that needs fixing (it shifted about 1/8" and isnt centered properly). Will fix that tonight.

CMP really ought to update their instructions. Those dimensions for the wing hold down make it easy to drill thru the wing fairing if you're not thinking ahead.

Edwin

(in reply to HenrikL)
       Post #: 102

RE: CMP/GSP Spitfire - 6/3/2005 2:10:44 PM   
HenrikL


 

Posts: 7
Joined: 8/20/2004
From: SevenoaksKent, UNITED KINGDOM
Status: offline 		Edwin!
Thanks for your reply!
Just to make sure I get it right - did you measure the elevator- aileron- and rudder-throws at the place where they were widest (where you get the largest throw of the surface at that angular deflection)?

I look forward to seeing the pictures!

Henrik.

(in reply to Edwin)
       Post #: 103

RE: CMP/GSP Spitfire - 6/3/2005 4:31:33 PM   
Sturtz



Posts: 1511
Joined: 9/22/2004
From: El Reno, OK, USA
Status: offline 		Flaps are small but they make all the differance in a low wind situation.
The landing vid is rough,,, but you got to understand there was (ZERO) wind here Weds. (Right Mugenkidd ?) lol We are use to 10mph winds or greater 350 days a week here. You Okies can testify on that one. EKK !!
I overshoot the runway but get her down in one piece. Tail down.
Landing CMP Spitfire

P51 Mustang and Extra300 belong to the Mugenkidd.



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< Message edited by Sturtz -- 6/3/2005 4:33:44 PM >


_____________________________

Kurt
AMA# 794291
Saito Club #121

(in reply to HenrikL)
       Post #: 104

RE: CMP/GSP Spitfire - 6/3/2005 4:57:55 PM   
Sturtz



Posts: 1511
Joined: 9/22/2004
From: El Reno, OK, USA
Status: offline
quote:

Did I notice a tendency to nose over on take off ?

Joe


Yup. Gotta hold some elevator throughout the run-up. 1/4 flaps will help too. Adds just enough lift to keep the nose up on takeoff.
Have plenty of spare props on hand till you ace the ground schooling. And if your running a Pitts style muffler, be sure to trim the pipes shorter.

(Historical Note
The few hours prior to D-Day were a race to find or make enough black and white paint for all the planes. Mops and rags were used by many to paint the stripes. Many planes were smeared and streaked from airspeed and exhaust fumes on the fresh cheap paint.

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< Message edited by Sturtz -- 6/3/2005 5:03:10 PM >


_____________________________

Kurt
AMA# 794291
Saito Club #121

(in reply to Sturtz)
       Post #: 105

RE: CMP/GSP Spitfire - 6/3/2005 6:57:17 PM   
Edwin


 

Posts: 3376
Joined: 2/8/2002
From: Leander, TX, USA
Status: offline 		Henrik,
Yes I measure at the widest cord of the control surface.
Edwin

(in reply to Sturtz)
       Post #: 106

RE: CMP/GSP Spitfire - 6/7/2005 7:11:22 PM   
Sturtz



Posts: 1511
Joined: 9/22/2004
From: El Reno, OK, USA
Status: offline 		Just checking in to see how the builds are coming along.


_____________________________

Kurt
AMA# 794291
Saito Club #121

(in reply to Edwin)
       Post #: 107

RE: CMP/GSP Spitfire - 6/7/2005 8:48:46 PM   
Edwin


 

Posts: 3376
Joined: 2/8/2002
From: Leander, TX, USA
Status: offline 		Didnt get to flying on sat. Need to finish up the detail work on it, pack it up and go to Idaho with it. Gonna do a little flying with friends up there for a week then tool around the mountains for awhile.
Edwin

(in reply to Sturtz)
       Post #: 108

RE: CMP/GSP Spitfire - 6/9/2005 3:22:22 PM   
Cubano8


 

Posts: 206
Joined: 11/2/2003
From: Miami, FL, USA
Status: offline 		I was wondering if this engine would work with this plane, or is it overkill?

http://www.horizonhobby.com/Shop/ByCategory/Product/Default.aspx?ProdID=EVOE26GT

Let me know what you guys think, please.

Thanks,

Sam

(in reply to Edwin)
       Post #: 109

RE: CMP/GSP Spitfire - 6/9/2005 3:30:13 PM   
runover1



Posts: 663
Joined: 4/27/2003
From: Lancaster, PA, USA
Status: offline 		It is a little on the large size, but give it a whirl and let us know how it does. My RCV 120SP is said to be a little on the large size as well, but it balanced out perfectly.

_____________________________

Enjoy everyday with the freedom of knowing it is a new day, even if you crash.

(in reply to Cubano8)
       Post #: 110

RE: CMP/GSP Spitfire - 6/9/2005 3:30:57 PM   
SJN



Posts: 4387
Joined: 9/28/2002
From: Copenhagen, DENMARK
Status: offline 		That looks exactly like an MVVS 26 engine.
Look on page 2 at the top.....if you havn`t seen it already.


Mine had good power on the webra 90 2 stroke.

_____________________________

Sonnich Johannesen

(in reply to Cubano8)
       Post #: 111

RE: CMP/GSP Spitfire - 6/14/2005 12:02:55 AM   
BigK9


 

Posts: 86
Joined: 11/25/2002
From: San Clemente, CA, USA
Status: offline 		I'm about to build my second GSP 71" Spit (sold the first one - big mistake). This time, I am going with an MVVS 1.60 or Mark 1.80 gasser. As Horizon just did a screw job on the other distributors for MVVS so that they could come up with a quick fix for a small gasser (the 'soon to be released - yeah, sure - Evolution 1.60 gasser is the exact same engine as the MVVS 1.6), I can't find any MVVSs anywhere.
Tired of the glow fuel mess - especially on this flat finish.
Overall - this ARF is very nice. My last one had a YS 1.20AC. Balanced without any lead anywhere (with the Century retracts).
Anyone have a GSP Spit with either of these engines, or a similar sized gasser?
I will probably go 17.5+ and a 3-bladed prop with the Mark 1.8.
As this GSP is so tail heavy, I am not worried about the extra size. Ofcourse, I may fly the thing close to mach 1 and rip the wings off, but why not?

(in reply to Pete850)
       Post #: 112

RE: CMP/GSP Spitfire - 6/14/2005 12:38:33 AM   
runover1



Posts: 663
Joined: 4/27/2003
From: Lancaster, PA, USA
Status: offline 		I was so ready to get my Spit in the air this week, but had engine trouble. I could not get my RCV 120SP to run right, so I called the manufacturer and they had me send it to their US Warranty Repair Facility. They said mine was one of the early ones that were not test run at the factory. I talked with the repair center and they are going to time it, run it and get it right. This is a great service. I am so looking forward to getting it into the air, but definately want it to run right and not deadstick on me.

Did all of you use the wooden dowel control rods, I am questioning whether I want to use these or not.

_____________________________

Enjoy everyday with the freedom of knowing it is a new day, even if you crash.

(in reply to BigK9)
       Post #: 113

RE: CMP/GSP Spitfire - 6/14/2005 11:18:21 AM   
Pete850



Posts: 250
Joined: 9/19/2003
From: WaterloovilleHampshire, UNITED KINGDOM
Status: offline 		I used carbon control rods - I just got tempted as they looked so black & shiny in the shop!!

BTW RCV Engines are made in the next road to where I work (Ferndown UK).

_____________________________

Yet another weekend's flying unscathed.......!!
www.planenutz.co.uk

(in reply to runover1)
       Post #: 114

RE: CMP/GSP Spitfire - 6/14/2005 11:28:10 AM   
Dave03B


 

Posts: 2206
Joined: 6/5/2003
From: Bournemouth, UNITED KINGDOM
Status: offline 		Ferndown Industrial Est. Wimborne! I never knew that until today!

< Message edited by Dave03B -- 6/14/2005 11:31:20 AM >

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Dave Bright - www.wimbornemac.org

(in reply to Pete850)