RE: f22 raptor-rc work on progress!   
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RE: f22 raptor-rc work on progress! - 1/12/2008 1:34 PM   
hpghost



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From: dubai, UNITED ARAB EMIRATES
Status: offline 		after 6hrs machining, here is the first nozzle (1hr setup, the machine does the rest!)

you can see the block before and after.

now it is time for me to make the rudder, stab and wing molds as I just received resin and plugs are now ready...AT LAST SOME PROGRESS!

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RE: f22 raptor-rc work on progress! - 1/13/2008 2:03 PM   
hpghost



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Status: offline 		now there is the bottom plate to complete the nozzle...need to find some very flat head screws...

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< Message edited by hpghost -- 1/13/2008 2:04 PM >

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RE: f22 raptor-rc work on progress! - 1/15/2008 4:42 PM   
acepilot121


 

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Status: offline 		thats looking awsome

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RE: f22 raptor-rc work on progress! - 1/15/2008 6:54 PM   
bruce88123


 

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Status: offline 		It does look nice.

B

TW - we may not comment often but we're watching.

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RE: f22 raptor-rc work on progress! - 1/15/2008 10:10 PM   
Mods-R-Me



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quote:

ORIGINAL: bruce88123

TW - we may not comment often but we're watching.


copy that


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RE: f22 raptor-rc work on progress! - 1/16/2008 3:54 PM   
hpghost



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Status: offline 		last week end, I tried to mold the last rudder half...I used polyester as i wanted to see how this works (in order to save some $ on my temporary molds!).

this is the last time I use the polyester for that! the mold couldn t release, the gelcoat was not good and the plug got damaged.
not even speaking about the smell of polyester which I hate and the dosing which is not as easy as epoxies...

will keep it to mold some epoxy parts only....

now I need to mill a new half rudder and do again primer on it...damn...lost 2 days work!

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< Message edited by hpghost -- 1/16/2008 3:56 PM >

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RE: f22 raptor-rc work on progress! - 1/16/2008 4:30 PM   
bruce88123


 

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Status: offline 		I can see the problem. You didn't use a big enough hammer.

Rats, I hate it when that happens.

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RE: f22 raptor-rc work on progress! - 1/16/2008 4:37 PM   
hpghost



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Status: offline 		next time I use the jig saw!!!


Btw, hummer is used to take back the alum rods (I do recycling )

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RE: f22 raptor-rc work on progress! - 1/16/2008 6:20 PM   
TeamSeacats



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Status: offline 		I don't think your problem was the polyester but the fact that your paint was not compatible with it - looks like they reacted and/or you didn't get a good release layer of wax. Try using wax with a PVA film to act as a barrier between the part and the mold....separation is guaranteed but a shiny finish is difficult with the PVA.

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RE: f22 raptor-rc work on progress! - 1/16/2008 6:52 PM   
hpghost



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Status: offline 		in fact there is two explanations from y side:
- resin didn t worked with my wax.
- wax work better with epoxy.

I already did many molds with Expoy gelcoat and resin. never such issue. so I beleive it is not problem between paint and wax as this was already like that before...don t you think so?

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RE: f22 raptor-rc work on progress! - 1/17/2008 4:05 AM   
TeamSeacats



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quote:

ORIGINAL: hpghost

in fact there is two explanations from y side:
- resin didn t worked with my wax.
- wax work better with epoxy.

I already did many molds with Expoy gelcoat and resin. never such issue. so I beleive it is not problem between paint and wax as this was already like that before...don t you think so?


I can't say for sure - I know that I have not had a problem with cheap "spray can" paints and polyester resin if I use PVA between. For my plugs, I paint with spray can enamel and then put a clear coat on it. The clear coat buffs to a great shine but is not terribly durable. Epoxy is certainly less reactive than polyester resins though....stick with what you know works!

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RE: f22 raptor-rc work on progress! - 1/17/2008 10:20 AM   
wings_of_fire


 

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Status: offline 		wow!....good to see u back in overdrive hpghost!.. good going ..keep it up.

what material is the metal plate u r using as the bottom plate for the nozzle ? I am concerned about the exaust gas temperature...& the aluminium nozzle behind the plate.

< Message edited by wings_of_fire -- 1/17/2008 10:21 AM >

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RE: f22 raptor-rc work on progress! - 1/17/2008 12:20 PM   
hpghost



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Status: offline 		metal plate is 0.5mm Stainless steel

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RE: f22 raptor-rc work on progress! - 1/17/2008 2:26 PM   
bruce88123


 

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ORIGINAL: hpghost

metal plate is 0.5mm Stainless steel

Ouch! Bet that took a toll on the cutter.

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RE: f22 raptor-rc work on progress! - 1/17/2008 2:46 PM   
hpghost



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Status: offline 		I simply spayed tons of WD40 while cutting and reduced cutter to lowest RPM... I would not say it is good but as you can see it works...

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RE: f22 raptor-rc work on progress! - 1/20/2008 10:13 AM   
hpghost



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Status: offline 		ok...I tried an other Stainless steel part and broke again a cutter. let's forget about this material...not good for my cnc.

in the meantime, this week end has been very active with 5 half molds done and the first rudder on its way...

result is not too bad.
I am even surpised to see the 2 halves wing molds fitting perfectly. considering the way they have been made, I am quite happy and this proves that CNC milling plugs is a good option.

there are few issues with panel lines which are not as clear as expected but this can be adjusted later on.

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RE: f22 raptor-rc work on progress! - 1/24/2008 4:04 AM   
Aircraftfreak15


 

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Status: offline 		keep us updated long project when you compleat this one and fly it whats your next one a C-5? that would be cool.

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RE: f22 raptor-rc work on progress! - 1/24/2008 7:39 AM   
hpghost



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Status: offline 		my next one will be even more challenging...it is already started and will only talk about it when this one is done...

stay tuned

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RE: f22 raptor-rc work on progress! - 1/24/2008 9:10 PM   
Aircraftfreak15


 

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RE: f22 raptor-rc work on progress! - 1/25/2008 5:35 AM   
hpghost



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Status: offline 		no real clue as I am not working on it 24/7 (even far from that). but let's say that a first flight before june could be possible

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RE: f22 raptor-rc work on progress! - 1/26/2008 9:19 PM   
hpghost



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From: dubai, UNITED ARAB EMIRATES
Status: offline 		just done the 1st rudder test part...one small issue with gelcoat (will solve it easy).

the nice JR8511 fits perfectly inside.

I am not sure if I will keep it inside later on as the torque need for rudder might be to high compared to what the arm lenght can offer.

will do an other part soon.

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< Message edited by hpghost -- 1/26/2008 9:21 PM >

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RE: f22 raptor-rc work on progress! - 2/4/2008 6:23 PM   
hpghost



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Status: offline 		some much office work that I can t progress! hope to move forward soon! I also expect resin shipment to come within a month....no resin = no progress!

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RE: f22 raptor-rc work on progress! - 2/23/2008 5:31 AM   
hpghost



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From: dubai, UNITED ARAB EMIRATES
Status: offline 		just did a temperature test for the nozzle with the use of IR temp pistol.

as far as I can see the top part (aluminium) reach max 220 degrees near the stainless steel plate and 180 degrees on the top part.

I need do do some little modification in the design but overall it is looking good

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RE: f22 raptor-rc work on progress! - 2/25/2008 1:50 PM   
hpghost



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From: dubai, UNITED ARAB EMIRATES
Status: offline 		hi everybody,

just to let you know that I have modified my website a little bit as follows:
- update on construction will be only on this post, not anymore on the site as it is not usefull to have to similar updates.
- the site will have latest status on display + latest version of 3d model which you can view in the form of a 3dPDF file.

have a look, it's nice!


http://www.raptor-rc.com

let me know if you have some comments for improvement...I'd like to have an online 3d model display but don t know how to do so far...

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RE: f22 raptor-rc work on progress! - 2/28/2008 12:17 PM   
hpghost



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Status: offline 		Here we are!

I finally managed to pulish online the 3d model of the jet! you can browse it directly from my site!

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