RE: JMGlasscraft Penetrator  
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RE: JMGlasscraft Penetrator - 4/24/2008 1:23:05 PM   
RocketRob



Posts: 538
Joined: 12/27/2002
From: San Francisco, CA, USA
Status: online 		Hey, I want some magic dust too guess I have to pick mine up in Oakland.

Dave, sounds like you are ready for the VA and a tank. Can't let those eleckys get you down, what you might not be able to beat in speed you can certainly beat in decibels! I would think it might just swap out cg wise?

Last weekend I took about 6 flights on the Micro and one on the Penetrator. Trimmed the cut down 7x6 prop trailing edge down a bit but still not quite screaming yet. Perhaps I am ready to put a real engine on here soon.[)]

(in reply to turbotodd)
       Post #: 76

RE: JMGlasscraft Penetrator - 4/27/2008 6:46:34 PM   
RocketRob



Posts: 538
Joined: 12/27/2002
From: San Francisco, CA, USA
Status: online 		Todd??

(in reply to RocketRob)
       Post #: 77

RE: JMGlasscraft Penetrator - 4/27/2008 9:45:57 PM   
DeviousDave


 

Posts: 384
Joined: 2/25/2007
From: , MI, USA
Status: offline 		LoL, this morning John quipped that once he flew his stuff with a Medusa, he'd have to take the name RocketTodd!

Did some more playing with the micro stuff today, but it's gonna need a separate post and a scanner to share pics.

Dave

(in reply to RocketRob)
       Post #: 78

RE: JMGlasscraft Penetrator - 4/30/2008 3:41:29 PM   
turbotodd


 

Posts: 36
Joined: 3/26/2008
From: Sunnyvale, CA, USA
Status: offline 		I missed flying this weekend. I'll be out Sunday. Started on the Yellow Jacket last night. Servos, firewall, are in. Glassed bottom side of wing and stab. I'll make some more progress tonight! The paper clips aren't making much sense to me. I was going to use piano wire and 1/8 balsa stick for elevator rod. Dave/Rob would you explain? I haven't done this part yet. With Medusa set-up should I come in at 4.5oz. I plan to weigh it before any paint goes on just out of curiosity. If all goes well the maiden will be Sunday! Yippee!!!TT

(in reply to DeviousDave)
       Post #: 79

RE: JMGlasscraft Penetrator - 5/1/2008 4:43:21 AM   
DeviousDave


 

Posts: 384
Joined: 2/25/2007
From: , MI, USA
Status: offline 		My airplanes are a little different than John builds them-if the paper clips are for what I think they are, it's for connecting the servo output arms to the control surfaces. You put extra bends in them and straighten/tighten them to get the control surface to center.

Myself, I like computer radios.

In fact, I gave John two computer radios and he doesn't use either one of them!

ETA: Remember to eat your wheaties before that test flight. The little bugger is going to be incredibly fast on that 5300KV Medusa motor. John and I tried this Sunday to have a top speed contest between his new Rivets and my Micro Estrellita, both having that setup in them. The little guy is normally right at my comfort edge-trying to follow two 16" airplanes around at mach two to line them up for passes was an excersice in futility and I was glad when it was over. They are building on our school field and things are getting tight there. These little buggers really move out. I remember back from my Sp400 racing days when people said their planes did 100mph. Well, these little guys would positively Clown on my 2nd place NATs plane. You won't believe it until you see it-be absolutely sure to follow throw recommendations, they are more important than CG on these little guys... And CG is pretty darn important!

< Message edited by DeviousDave -- 5/1/2008 4:52:03 AM >

(in reply to turbotodd)
       Post #: 80

RE: JMGlasscraft Penetrator - 5/1/2008 7:10:46 AM   
turbotodd


 

Posts: 36
Joined: 3/26/2008
From: Sunnyvale, CA, USA
Status: offline 		I get more excited everytime you warn me!!! LOL. I will make sure everything is spot on before maiden. I don't recall seeing aileron throws. I will check the print in the A.M. Finished glassing everything tonight. I will use .032 wire w/sleeve for the elevator. I have a computer radio and yes I use it. I will probably add some expo. on the elevator for the maiden just in case. Oh if for any reason things don't go well you'll know because John will get another order till I get it right! Todd

(in reply to DeviousDave)
       Post #: 81

RE: JMGlasscraft Penetrator - 5/1/2008 12:12:58 PM   
RocketRob



Posts: 538
Joined: 12/27/2002
From: San Francisco, CA, USA
Status: online 		Todd, glad you are getting along.
I would like to echo Dave's comment about throws.
Even on my .010 micro, I set a bit more throw on high rates and call outs for low rates. After launch I could not get to my dual rate switch fast enough

And the speedy electric would be perhaps twice as critical?

carefully check and recheck your cg as you build - it is tough to take weight off the tail after it is complete.

And I am really starting to like the underhanded toss!

< Message edited by RocketRob -- 5/1/2008 12:14:14 PM >

(in reply to turbotodd)
       Post #: 82

RE: JMGlasscraft Penetrator - 5/1/2008 12:17:33 PM   
RocketRob



Posts: 538
Joined: 12/27/2002
From: San Francisco, CA, USA
Status: online
quote:

Oh if for any reason things don't go well you'll know because John will get another order till I get it right! Todd


I order them 2 at a time[)]

Just launch over the pickelweed! These planes are very strong and light and subscribe to the "low mass formula" - they carry low mass to the scene of the accident[)]

(in reply to RocketRob)
       Post #: 83

RE: JMGlasscraft Penetrator - 5/2/2008 12:28:00 AM   
DeviousDave


 

Posts: 384
Joined: 2/25/2007
From: , MI, USA
Status: offline 		The CG called out on the plans is fairly conservative, but when balancing planes with chords this narrow, you want to make a testing jig, maybe drill a pair of holes in a board and fit sharpened pencils as the points you set the plan down on.

The foam wing is a world of difference from the built up version, especially on landing. Still, the plane wants a little power on final. Nothing major, it just helps to control the decent-reynolds numbers on a tiny wing like this aren't too good. Stalls are a non-event, and you really have to screw up to make one snap roll.

Speaking of snaprolls and stalls, the new Rivets/ThunderChicken is even better than the MicroShark family of models. John had snaproll problems with the design when he first test flew it and shelved it until a few weeks ago. I didn't get to see the original flights, but they were done with the GWS fan motor on 6 cells. I saw it sitting on his shelf and cajoles him into putting a proper motor and battery in it and giving it a go again. It's a really zippy plane, I wrung it out as best I could-if there was a snaproll tendency I couldn't find it. It turns harder than I want in a racer (think: chained up Dog, Mailman), and with it pointed into the wind it comes down like an elevator with the stick pulled back all the way. Just a little wing wiggling to correct. If it does the same on a calm day I'm going to puch to get rid of some of the washout, lord knows why-it's a smokin' little airplane. Wonder how much faster it will go with a foam wing like the YellowJacket?

The underhanded toss is no-fool with the Medusa setup. Not enough prop to worry about torque, TONS of thrust for such a little plane!

(in reply to RocketRob)
       Post #: 84

RE: JMGlasscraft Penetrator - 5/5/2008 3:24:45 PM   
turbotodd


 

Posts: 36
Joined: 3/26/2008
From: Sunnyvale, CA, USA
Status: offline 		Sunday was a blow out! Literally! I flew my Extra a couple times and left. The Yellow Jacket build halted on Thursday due to work issues. (overtime) Overtime=$ =penetrator. I think I'll call John today and order one!!! I will get back after my build tonight. It weighs 4.1 oz. w/o paint. I build slow, but clean. I will have at least 16 hrs. after paint RTF in it. I think I could do another one in about 12 next time around. I will post pictures this week. Todd

(in reply to DeviousDave)
       Post #: 85

RE: JMGlasscraft Penetrator - 5/6/2008 11:12:27 AM   
turbotodd


 

Posts: 36
Joined: 3/26/2008
From: Sunnyvale, CA, USA
Status: offline 		I decided to go with the Cheap Thrills 36". My 34" Mustang is getting retired so it's power system will go in the new airframe. Medusa 28 40 3400kv. 3s TPX2200 50a about 500 watts. Pitch speed is about 150mph with 5x5 APC. I think it will be a good match. My Yellow Jacket will get paint tonight. I'm at 4.5oz. I must have left something out at the last weigh in.

(in reply to turbotodd)
       Post #: 86

RE: JMGlasscraft Penetrator - 5/6/2008 1:27:03 PM   
RocketRob



Posts: 538
Joined: 12/27/2002
From: San Francisco, CA, USA
Status: online 		Todd, 'bout time to put the Mustang out to pasture . I'll be pleased to see this one!

I'm jonsin to put a VA in the pee wee penetrator - unless Dave beats me to it.

The little micro Estrelita just gets faster and faster. I removed the prop spring as it seemed to rub the propdriver a bit. And I'm still only using 25% nitro and a stock prop.
Something about fixed throttle planes, and knowing there is no turning back till dead stick.
When I turn downwind and visually and aduibly see this little red spec acellerating, you get a rush of adrenelin and it just sortof ties up your gut.

< Message edited by RocketRob -- 5/6/2008 1:29:13 PM >

(in reply to turbotodd)
       Post #: 87

RE: JMGlasscraft Penetrator - 5/7/2008 12:18:11 AM   
DeviousDave


 

Posts: 384
Joined: 2/25/2007
From: , MI, USA
Status: offline 		Oh, the VA is already in the PeeWee Penetrator, just haven't flown it yet.

"Maybe this weekend,..."




Rob: I love diving down wind for a low pass with these .010 planes-the little guys sound like they are going to explode! weeeeeEEEEEEEEEEEEE-eeeeeeeeeeeeeee!

(in reply to RocketRob)
       Post #: 88

RE: JMGlasscraft Penetrator - 5/7/2008 3:08:49 AM   
flying poodle



Posts: 144
Joined: 10/28/2003
From: ashland city, TN, USA
Status: online 		Love the Atari logo!

(in reply to DeviousDave)