Matronics Email Lists

13 yrs ago, I flew with friends to Grand Canyon Caverns in AZ and fueled up at local source.Just drove right up and got full service.
Bob H

I believe that the early Pulsar had added plies in critical areas to accept higher loads of a 912 than the initial design with a 582 engine. I don’t know the exact details of the beef up. But as Mik ...

I designed a new, compact muffler and am in process of making a pair of prototypes to fly and test.
Won’t be available for a couple of months. Units are all 304 SS, TIG welded and cylindrical for m ...

I'm in Santorini, Greece so comment is limited.

Elongation of bolt material is primary indicator of energy absorbtion capability. Grade 8 has around 12% which is plenty for gear application and won ...

912 alternator doesn't have brushes, so that can't be the issue.
Bob H

From: pulsar-list <pulsar-list@matronics.com>
Reply-To: pulsar-list <pulsar-list@matronics.com>
Date: Wed, ...

Someone asked a question about the dimensions of nose gear belleville washers.
I checked mine and here are dimensions -

Thickness = .045”
Height = .090”
OD = 1.25”
ID = ...

I use Falcon also. My cost is about the same as Bernie's for liability only.
Bob H

From: Pulsar-List Digest Server <pulsar-list@matronics.com>
Reply-To: <pulsar-list@matronics.com> ...

Use Rhino 9700 as tank coating to protect glass from ethanol/fuel and use
polysulphide to seal alum end plate to glass at wing root.
Bob H

From: Pulsar-List Digest Server <pulsar-list@matro ...

Make sure replacement tube is made from 304 or 321 stainless steel for
long-term oxidation resistance.
Bob H

From: Pulsar-List Digest Server <pulsar-list@matronics.com>
Reply-To: <p ...

You don't want to use a polyester for structural laminating, only an epoxy,
because of the strength advantages of epoxy and shrinkage of polyester.
The highest mechanical properties of a room temp e ...

All organic materials will eventually be effected by solvents. The degree of
dissolution is a function of the specific materials involved and the
solvent's chemical activity, concentration and time ...

I tried that HB heater in plane years ago and found that the electrical noise from the fan motor interfered with comm so badly, I could not hear or talk.
Bob H [quote][b]

Just to be correct technically, it�s 4130 steel. You don�t want more than
.30% carbon for welding.

The nose gear mod assures safety for the future.
Bob H

From: Ron Koval <ronko11@yahoo. ...

Read your recommendation to have Steen build spars for Pulsar- Mechanical properties of wood vs glass would preclude direct dimensional substitution, so a wood spar would have to be larger for equival ...

Yes, those were from Aerodesigns gear on XP.
Bob H

[quote] From: Pulsar-List Digest Server <pulsar-list@matronics.com>
Reply-To: <pulsar-list@matronics.com>
Date: Thu, 18 Jul 201 ...

Regarding gear repair from Palmer-
If fractures were confined to only the resin between fibers, you could
theoretically inject resin and repair gear. But cracking of structure
normally involves fra ...

Dennis;
4340 has more carbon (30%) than 4130 so weldment has higher chance of
cracking after cooling. You want to keep carbon content in steel for welding
below .30%, hence 4130 is better choice. 4 ...

I believe the Rotax requirement to rebuild carbs every 200 hrs is too conservative so they can sell parts.
If you flew in continuous dust storms or rain, maybe there is a need. But for most pilots, a ...

As I've mentioned several times previously, the stiffness is due to the CTE
differences between glass wing and aluminum ailerons. Commercial aircraft
use a sliding hinge arrangement to allow for the ...

912 should never be idled below 1600 rpm as low speeds cause gearbox to vibrate. Mine idles around 1750 rpm, smoothly.
Prop balance will effect vibrations. I use a static tire balancer to check prop ...