EVR Hawker P1216 Plans

[EchoVictor]

Been asked by a few folks who have requested plans, so I figured I'd put 'em in here.

Build thread here;
http://www.oldrocketforum.com/showthread.php?t=6598

Parts List:

Part Name / Quantity / SEMROC Part Number
PNC-55IR Plastic Nose Cone / 1 / BNC-55AO
PNC-20Y Plastic Side Cones / 2 / BNC-20Y
BT-55 Body Tube, 5.5" long / 1 / BT-55RJ
BT-20 Body Tubes, 9" long / 2 / BT-20N
BT-20 Engine Tube, 2.75" long / 1 / BT-20J
CR-2055 Centering Rings / 2 / RA-2055
CR-520 Thrust Ring / 1 / EB-20A
Engine Hook, 2.75" long / 1 / EH-28
Kevlar Thread / 1 / SCK-24
Shock Cord / 1 / ECR-236
Parachute, 16" dia. / 1 / CP-16Y
1/8" thick balsa fin stock / 1 / FMB-43
3/32" thick balsa fin stock / 1 / FMB-33
Launch Lug, 1/8" dia. / 1 / LL-117
1/4" x 3/16" balsa stock, 5" long / 1 / NA

PART NOTES:
PNC-55IR Nose Cone can be obtained from the Estes kit #2183 Shuttle Express.
PNC-20Y cones can be obtained in Estes #303161 NC-20 Nose Cone 4 pack.
If using SEMROC balsa nose cone, make sure to add screw eye (not in parts list).

Parts view (JPEG should be 1/1 scale):
http://i73.photobucket.com/albums/i204/EchoVictor/Rocket%20Stuff/HawkerP1216PartsView.jpg

Front View (JPEG should be 1/1 scale):
http://i73.photobucket.com/albums/i204/EchoVictor/Rocket%20Stuff/HawkerP1216FrontView.jpg

Top/Bottom/Side Views (JPEG should be 1/2 scale):
http://i73.photobucket.com/albums/i204/EchoVictor/Rocket%20Stuff/HawkerP1216TopSideViews.jpg

ASSEMBLY NOTES:
Main Wings cut from 1/8" thick balsa sheet.
Tails and Fins cut from 3/32" thick balsa sheet.
Wingtip Rails cut from 1/4" x 3/16" balsa stock. May substitute dowel rod or launch lugs.
Be sure to swing test as some dimensions may end up slightly different. Additional nose weight may be needed for stability, especially if using balsa cones.

Enjoy (and if you build one, you MUST post pictures :))!

Later,
EV

[pantherjon]

Thanks! :)

[A Fish Named Wallyum]

This looks like a candidate for BARCLONE!!! :D

[CPMcGraw]

This looks like a candidate for BARCLONE!!! :D

I'll second that thought! :D

It looks really good, EV!

[EchoVictor]

Add it to the ranks, then!

Later,
EV

[CPMcGraw]

EV,

Noticed there is not a RockSim file for this one. Did you happen to work one up?

[andrew scott]

I just did a quick one of the EVR hawker P 1216


best motor for this B6-4, B4-4, c6-5

22.200 Grams Clay nose Weight 85.50 mm from the nose tip

Andrew ;)

[CPMcGraw]

Thanks, Andrew!

I've made some adjustments to the file, based on the construction photos and EV's description of the build. The stability margin for this bird is about 2.13 on a B4-4, 2.15 on a B6-4, and 2.02 on a C6-5. This works out well given EV's description of the flight as being straighter than he anticipated.

EV, if you see anything in this file that doesn't match the prototype, shout!

Length: 19.77"
Diameter: 1.352" (BT-55)
Fin Span: 9.20"
Weight: 2.20 oz

Simulation runs shown below. All three listed engines work from a 36" x 1/8" rod.

[EchoVictor]

Gee, thanks guys! I don't have RockSim, so I appreciate you pulling together these files.

Not to be nitpicky, but Craig, you did ask me to note anything that I see that's different from the real bird. I'm out of town for the week, so I'm working from memory here...

1 - Wingtip side missile rails are missing.
2 - Not sure if you noticed that main wings are 1/8" and the rest of the fins are 3/32" thick
3 - The rear horizontal stabilizers aren't that far aft. The rear tip of the fin is parallel with the end of the body tube, not the rear of the root edge. Overall is about 1/2" forward from where you have it now.
4 - Same thing on the lower vertical stabs. Extend the rear edge of the upper stab down to find the point. It's around 1/4" forward.
5 - I don't know the total mass, but I did happen to measure the PNC-55IR nose cone, and it's 15 grams. There's no additional clay weight inside.

Later,
EV

[CPMcGraw]

Gee, thanks guys! I don't have RockSim, so I appreciate you pulling together these files.

Not to be nitpicky, but Craig, you did ask me to note anything that I see that's different from the real bird. I'm out of town for the week, so I'm working from memory here...

1 - Wingtip side missile rails are missing.
2 - Not sure if you noticed that main wings are 1/8" and the rest of the fins are 3/32" thick
3 - The rear horizontal stabilizers aren't that far aft. The rear tip of the fin is parallel with the end of the body tube, not the rear of the root edge. Overall is about 1/2" forward from where you have it now.
4 - Same thing on the lower vertical stabs. Extend the rear edge of the upper stab down to find the point. It's around 1/4" forward.
5 - I don't know the total mass, but I did happen to measure the PNC-55IR nose cone, and it's 15 grams. There's no additional clay weight inside.

Later,
EV

EV,

Thanks for the feedback. Andrew really did a bang-up job getting the RKT file worked up, so I more-or-less just used his file as a foundation. I'll tweak a new copy sometime tomorrow, after the Shuttle gets off, with these corrections.

[andrew scott]

Yep PC55IR nose cone is about 12-15 grams on my scales.

just have to do a quick rework on the sim. ;)


Andrew

[andrew scott]

update here is the new rocsim for the EVR Hawker p 1216

use 10 grams nose Weight to get in the sweet spot for B6-4 B4-4. 2-7 ft/s

C6-5 is still in 16 ft/s mark.

Andrew :cool:

[Feyd]

Man that is a sweet-looking bird. Is that nosecone available anywhere? I haven't looked yet.

Feyd

[CPMcGraw]

Man that is a sweet-looking bird. Is that nosecone available anywhere? I haven't looked yet.

Feyd

It's mentioned in the first message of this thread:

...PNC-55IR Nose Cone can be obtained from the Estes kit #2183 Shuttle Express...

[Feyd]

Ah ok, that's what I get for not paying attention to the parts list :) I have a Shuttle Express built but I stepped on one of the shuttles :p so it hasn't flown. I may have to cannibalize it.

Thanks!

Feyd

[EchoVictor]

Just got home from vacation last night, and put the Hawker on the scales this morning.

Total unloaded weight (sealed/painted/decaled);

76 grams / 2.65 oz

Any other measurements needed?

Later,
EV