FREE SHIPPING ON ORDERS OVER $350 (USA ONLY - SOME EXCLUSIONS APPLY) | 877-4-SPRUCE
Thumbs 1
Thumbs 1
Thumbs 1

HEATER BYPASS VALVE WITH ENGINE SIDE CONTROL LEVER

$106.75/Each
Quantity
Add to Wishlist
Part# 08-01311-1
MFR Model# ENGINE SIDE

Overview

The all stainless steel heater bypass box was conceived while looking at aluminum hardware used for sealing the firewall on experimental aircraft. It didn't make much sense to try to seal a stainless steel firewall with aluminum hardware. It is well known in the metal working world that stainless steel melts at 2600 degrees and aluminum melts at 1200 degrees. What most pilots don't know is that windblown avgas burns about 1875 degrees. And so, work on the all stainless steel heater bypass box began.

The all stainless box withstood the torturous flames for 10 minutes without failure. A good first test. Then the aluminum box was tested. In only 16 seconds the aluminum was a liquid puddle at the bottom of the simulated firewall. Only 16 seconds, you might not even know you have an engine fire in that time. This was an eye opener.

Once the all stainless steel heater bypass box was in production, the fun part began. Testing initially was a challenge because a simulated engine fire was required. But how hot does windblown avgas really burn? Our tests showed that windblown avgas burns at 1875 degrees. Now the test bed was in place.

Three models of the all stainless steel heater bypass boxes are offered. The engine side control lever comes with a backing plate that attaches to the cabin side of the firewall and has a 2 inch scat tube outlet so a tube can be attached in the cabin that directs air where wanted. The cabin side control unit is commonly used on RV7, RV8 and RV9 aircraft where the air is distributed in the cabin through a plenum. The RV-10 requires a special set of two that have offset levers to clear the upper nose gear mount.

All stainless steel construction offers a fireproof closure in case of an engine fire. \

Designed with weight in mind, our stainless unit weighs 3.95 ounces and replaces the TG-10 aluminum box that weighs 3.28 ounces.

New flapper design offers better seal to keep out hot air when closed.

Documents

  • Customers Also Viewed
  • Frequently Purchased With
  • Related Items

Reviews

Good compact unit.

Robert M Verified Purchase

ALL SS HEAT BOX ENGINE SIDE

November 30, 2021

high quality part, easy to install and works great on a 912 Rotax powered Kitfox. I had previously tried using coolant for water heat but got minimal heat. This heat box combined with custom made exhaust muff from AS is the way to go.

Bill N Verified Purchase

ALL SS HEAT BOX ENGINE SIDE

November 10, 2021

Fast efficient postage. Item exactly as they said. Would recommend this company any time

Robert U Verified Purchase

ALL SS HEAT BOX ENGINE SIDE

October 4, 2021

Well built Cabin Heat Valve, easy to install.

Gary K
September 16, 2020

Good quality

Richard E
December 12, 2019

Q&A

Please note, Aircraft Spruce's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.

Q: Does this heater bypass valve take 2" diameter ducting?

Yes, this has a 2" diameter for ducting.

Q: Does this dump air when not directed in the cabin?

Yes that is correct.

Q: What are the dimensions of this width/ height?

This is hard to measure but it is approx 5 inches wide and 2.5 high.

View in Catalog

View Image View in Catalog