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Old Aug 02, 2003, 12:51 PM
AKA BillyKillaWatt
Billy Haynes's Avatar
Rockwell, NC
Joined Jan 2002
1,036 Posts
Morris Hobbies Pen Knife

Well, like I dont have enuff stuff to do! I saw this kit in the LHS & just had to have it. Gofli, how's this go'n to fit in the trailer? O yea I killed the profile sukhoi, It'll fit......
I did a search & couldn't find where anyone's done a conversion thread on the zone (found where someone had talked about it, but no further post about it) of the plane so I figured I'd do one.
Morris Hobbies Pen Knife 36" w.s., 500sq ", engine .20-.32, oops....... motor Mega 16/15 series, 10c KAN 950 (no Lipolys yet) 4ch w/5servos.
Going to try & keep it light as possible, cutting out all excess wood in parts (ribs, fuse sheeting, ect). I'm shooting for AUW of no more than 36 oz's. So lets get to it!
One more thing, This kit comes with one of those plastic containers for holding used x-acto blades, nice touch
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Old Aug 02, 2003, 02:30 PM
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hopsterguy's Avatar
Westerly, RI, USA
Joined Oct 2002
1,482 Posts
Re: Morris Hobbies Pen Knife

Quote:
Originally posted by Billy Haynes

One more thing, This kit comes with one of those plastic containers for holding used x-acto blades, nice touch

Oh man, that's great. New one by me.

We should make a list... 100 ways to use an unused glow tank.
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Old Aug 02, 2003, 04:15 PM
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NM
Joined Jun 2002
274 Posts
My son flies one with a Hacker B40 , 4-1 gears. 10 X2400 SCRs.
Unlimited vertical , very aerobatic.
I think a Mega 1615 will be underpowered . He also flew it with A jeti 30-3 , so a bigger Mega would be fine.

Keep us posted

Dick Roberts
Navajo Dam , NM
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Old Aug 02, 2003, 09:16 PM
HobbyKing
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Hong Kong, Hong Kong Island, Hong Kong
Joined Apr 2001
4,507 Posts
I'd tend to agree with Dick, with a 16/15 series you aren't gonna get quite the performance you're gonna want for a Pen Knife...I had a .40 on mine and that was ballistic..I'd say something comparable to an OS .32 would be perfect.... A Mega 22/30/3 direct drive would fly it well...or perhaps my old E3D setup, the Mega 22/20/2 geared 3.75:1 on 10 cells would fly it well.

Just a thought...

--Paul
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Old Aug 02, 2003, 11:12 PM
AKA BillyKillaWatt
Billy Haynes's Avatar
Rockwell, NC
Joined Jan 2002
1,036 Posts
Well I started building on it.......I changed my mind on the 16/15/series before I even saw your post........small wing span, but man.......It's wide & thick, did I mention thick.......& the wing area just didn't ring a bell in my head like it should.......
Sooooooo, I got a new Astro Flight cobalt 15 FAI motor w/std g.b., that I bought before I knew brushless was the real ticket......I'll prob never be able to get rid of it, so might as well use it. I've got other AF motors & I like'm, was just hope'n to keep this plane light.......still, w/FAI 15, 10c 1950's it's only 11.5 oz sq ft wing loading. I was hope'n to keep it 9 or under.....o well.
Seem's to me that this thing has a small rudder & ele., I thought about making them bigger, but then it wouldn't be a "stock" Knife.
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Old Aug 03, 2003, 01:01 AM
HobbyKing
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Hong Kong, Hong Kong Island, Hong Kong
Joined Apr 2001
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Billy,
This plane, is essentially a .40 size fun fly (like the Morris Knife) except its just clipped down it seems..The control surfaces seem small on it, but they are effective.... lots of throw...put some expo into her. She can get squirrelly.. Lots of fun...Mine even held together for several rounds of combat.... (Rest in pieces)

--Paul
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Old Aug 03, 2003, 01:47 AM
AKA BillyKillaWatt
Billy Haynes's Avatar
Rockwell, NC
Joined Jan 2002
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"is essentially a .40 size fun fly "
there's no way I'd put a "good" .40 on this plane, even w/throttle management I don't see how it would hold together....(remember I'm cutting out all the fat I can)...It might hold up to my blue os .46LA (POS).
I used the SWAG method to determine my weight & motocalc shows good #'s for the FAI & the 4/5FAUP's I'm getting from Cue.
Static ratio 1.35:1, excess ratio .473:1.
Motocalc's #'s aren't as good for my 540T & it hovers/ fun to fly.
I need some sleep......................................
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Old Aug 03, 2003, 11:42 AM
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Raleigh, NC
Joined May 2003
483 Posts
pen knife w/an AXI?

any thoughts on building one of these with an axi 2814/12 in the nose?

Barrett
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Old Aug 04, 2003, 09:51 AM
AKA BillyKillaWatt
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Rockwell, NC
Joined Jan 2002
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Haven't got as much done at this point as I hoped. I can tell laser cut kits have spoiled me
capncrunchI know very little about brushless, nothing about AXI's.
Fuse weight 4 7/8 oz's. I have to go get more thin ca before I can do anything else........
I made a new R.H. ply nose piece that extends past the wing LE so I can attatch the batt pack to it, & not 1/16" balsa. I plan to just use hook & loop fastener glued to the ply (between holes) & to the batt pack, then a couple pieces strapped over top of the pack.......unless I can come up w/ something better
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Old Aug 04, 2003, 11:51 PM
HobbyKing
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Hong Kong, Hong Kong Island, Hong Kong
Joined Apr 2001
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Quote:
Originally posted by Billy Haynes
"is essentially a .40 size fun fly "
there's no way I'd put a "good" .40 on this plane, even w/throttle management I don't see how it would hold together....(remember I'm cutting out all the fat I can)...It might hold up to my blue os .46LA (POS).
Oh it does hold up to a "good" .40 ...I don't know how, but it did....even while flying it in combat (I didn't have anything else to use) with other planes much faster than me.. I do agree though, when cutting out a bunch of weight, it would shake itself apart.

I can't wait for more pics of it.

--Paul
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Old Aug 05, 2003, 01:31 AM
AKA BillyKillaWatt
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Rockwell, NC
Joined Jan 2002
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Rudders done, horizonal stab is done..........nothing worth showing pic's of. Both pieces built per plans, except I made a working tail wheel. I used 1/2 a Robart hinge stuck in the fuse for the bearing, small dia music wire & small plastic/foam tail wheel. The plans show a fixed tail wheel...........I've never understood why anyone would want a fixed wheel or wire, or one of those caster type wheels. I know, it's not going to be on the ground that much, but a working tail wheel isn't that much more trouble or weight..........& it looks so much beter.......I think
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Old Aug 05, 2003, 01:20 PM
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Santiago Pudahuel, Chile
Joined May 2003
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I saw a PenKnife with an OS25 glow last sunday at the field.
Very nimble, rolls like a drill, inside and outside loops very very small, but a brick without power.

JL
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Old Aug 05, 2003, 03:36 PM
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NM
Joined Jun 2002
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Capt. Crunch
I think an AXI 2820-14 would fly it fine. It flew good with a Jeti 30-3 , but not the vertical as with the Hacker BL40.

Mounting an Axi to the profile fuse might be an intresting challenge .

Dick roberts
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Old Aug 05, 2003, 10:50 PM
AKA BillyKillaWatt
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Rockwell, NC
Joined Jan 2002
1,036 Posts
fuse

fuse & tail are built...........6 1/8 oz's. After I get this posted I'm going to build the ailerons, & cut the holes in the ribs. Hopefully I'll get the wing done before I go to work tomarrow
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Old Aug 06, 2003, 12:55 AM
AKA BillyKillaWatt
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Rockwell, NC
Joined Jan 2002
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2 hours,= ailerons built & sanded, Ribs put on a diet. I didn't weigh the ribs before cutting the holes, figured weight savings wouldn't be that great, but hey, any reduced weight will increase my power-to-weight ratio specially since I'm unsing non-brushless, I need all the help I can get Now to get some sleep so I can get back to it in 7 hours...
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