Sunday Punch

[Lynn Hunt]

Well, let's see, you can touch it, it complements the weight and balance for the aircraft so in that sense it's real. We need to replace the booties around the barrel shrouds and send out the fire bottles for hydro which are located in the nose. But more importantly and what I think you're really after, it has a NA data plate, ammo box mounts and originally came on the airplane which makes it real. You will see in some old photos glass noses that have been either painted or metalized but they still retain that bomber shape. The gun nose has a different shape and could be changed in the field.

[Matt Gunsch]

There is even a rumor about a glass nose............

NOOOOOOOOOOOO!

That gun nose isn't "real", though, is it? Looks like a cobbled-together approximation to me?

What's the story on the prop AD?

A DC something that had been sitting for a number of years was on a ferry flight and it shucked a blade due to corrosion, and the plane went down. So all Hydromatic Hamilton Standard props have to be inspected between 3 and 5 yrs,

81-13-06 R2 HAMILTON STANDARD: Amendment 39-4133 as revised by Amendment 39- 4409 is further revised by Amendment 39-6271.

Applicability: Hamilton Standard Hydromatic (noncounterweighted) propellers with aluminum blades that use engine oil for pitch control (does not apply to propellers with integral oil control or to propellers with steel blades) of the following types: 22D30, 22D40, 23D40, 23E50, 23E60, 24D50, 24E60, 33D50, 33E60, 34D50, 34D51, 34E60, 43D50, 43D51, 43E60, and 43H60, as installed on various reciprocating engine powered aircraft such as, but not limited to: Beech D17 and D18, Boeing 377 series, Canadair Model 4 and CL-215, Curtiss-Wright C-46, DeHavilland DHC-2, DHC-3, and DHC-4, General Dynamics (Convair) T-29, 240, 340, and 440 series, Gulfstream American (Grumman) G-12A, G164, F4U, S-2F, TBM, and W-2F series, Lockheed L-10, L-12, 049, 749, 1049, 1649 series, Martin 202 and 404 series, McDonnell Douglas B-26, DC-3, DC-4, DC-6, and DC-7 series, North American AT-6, B-25, P-51, SNJ-5, T-6 and T-28.

Compliance: Required as indicated, unless already accomplished.

To prevent propeller blade failure due to corrosion and fatigue, accomplish the following:

(a) Inspect propeller blades within the next 90 days after July 1, 1982, or within 18 months since last inspection, whichever occurs later, for corrosion in the blade fillet and shank area, particularly under the teflon friction reduction strip and the resin corrosion barrier, in accordance with Hamilton Standard Aluminum Blade Overhaul Manual No. 130B, dated March 1, 1980, previously incorporated by reference on June 28, 1982, in AD 81-13-06. Thereafter, if corrosion is found reinspect at intervals not to exceed 18 months since the last inspection.

(b) For propellers with all installed blades having no corrosion at the last inspection, the 18 month reinspection interval may be increased as follows:

(1) Reinspect between 33 and 39 months since the last inspection. If corrosion is found to be beyond repairable limits return to the 18 month reinspection interval required by paragraph (a). If corrosion is found to be within repairable limits the reinspection interval cannot exceed a 36 month reinspection schedule.

(2) If no corrosion is found at the last 33 to 39 month reinspection in accordance with paragraph (b)(1), then thereafter reinspect at intervals not to exceed 60 months. If corrosion is found to be beyond repairable limits at any reinspection interval return to the 18 month reinspection interval required by paragraph (a). If corrosion is found to be within repairable limits the reinspection interval may remain on a schedule not to exceed 60 months.

(c) Prior to further flight, blades with corrosion in the fillet or shank area must be replaced with an airworthy blade or repaired in accordance with Hamilton Standard Aluminum Blade Overhaul Manual No. 130B, dated March 1, 1980.

(d) Disassembled propeller blades preserved in accordance with Hamilton Standard Aluminum Blade Overhaul Manual No. 130B, dated March 1, 1980, need not include storage time when computing the time since last inspection.

(e) Upon submission of substantiating data by an owner or operator through an FAA Airworthiness Inspector, the Manager, Boston Aircraft Certification Office, Engine and Propeller Directorate, Aircraft Certification Service, Federal Aviation Administration, 12 New England Executive Park, Burlington, Massachusetts 01803, may adjust the compliance times specified in this AD or approve an equivalent means of compliance with this AD.

NOTE: Extensions to the compliance schedule previously granted to owners/operators are still applicable to this amendment. These extensions which are beyond a 39 month reinspection interval may be extended to 60 months as provided in paragraph (b)(2).

(f) Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate airplanes to a base for the accomplishment of the inspection required by this AD.

This AD revises AD 81-13-06 R1, Amendment 39-4409, (47 FR 36217; August 19, 1982), which revised AD 81-13-06, Amendment 39-4133.

This amendment (39-6271, AD 81-13-06 R2) becomes effective on September 15, 1989

[Pogo]

Thank you. Hooray for WIX! Beats me how the hell we ever got along before the internet.

Now, if I may continue to feature my remarkable ignorance to the world at large, may I ask how many B-25's are/were affected by that prop AD? I mean, they all have pretty much the same engines, but does that mean they also have the same props?

[Matt Gunsch]

Thank you. Hooray for WIX! Beats me how the heck we ever got along before the internet.

Now, if I may continue to feature my remarkable ignorance to the world at large, may I ask how many B-25's are/were affected by that prop AD? I mean, they all have pretty much the same engines, but does that mean they also have the same props?

Read the AD, EVERY SINGLE PLANE that uses a Ham Standard Hydromatic prop, that means B-25, A-26, TBM, T-28, P-51, P-47, B-17, B-24, B-29 and on and on and on

[Matt Gunsch]

darn double tap

Last edited by Matt Gunsch on Wed Sep 02, 2009 10:34 pm, edited 1 time in total.

[MattP38]

Very neat info about Sunday Punch making progress. I do not mean to offend, but is it necessary to have another glass nosed B-25? How's about keeping the gun nose or making a more accurate representation? :)

[Jack Cook]

It looks pretty accurate just needs a turret.

[steve dickey]

It looks pretty accurate just needs a turret.

Turrets just add drag, slows ya down, I like the clean lines of those that still fly without the turret. Nice pic BTW

[MattP38]

That's great. Jack, you're right it does need the top turret.